Cobra 2010 gtl mods. I noticed that there are alot of mods.

Cobra 2010 gtl mods It’s a 40 channel AM and Sideband radio with Upper and Lower Sideband and the following features Volume, Squelch, RF Gain , Mic Gain, Voicelock “clarifier” , AM, LSB, USB knob , SWR, MOD knob, ANL button, NB Button, Ch 9 button, Cobra 2010 GTL WX SPECIFICATIONS. These chassis are remarkably stable after the clarifiers are opened and expanded. 2 posts • Page 1 of 1. 1150 in about 1 second. Modification #1 only replaces the final. Feb 2, 2010 #2 We are working on the pinched SSB audio on the Cobra 200 GTL DX now. Exit_Thirteen Frequent Keyer Posts: 74 Joined: Saturday 12th Apr 2008, 1:10 Location: Iowa, USA. Good Luck to you and NPC RC mod available, did it today on a Cobra 200. 855 MHz in three bands Sometimes with these mods unless you are sticking to just am communication you are best to stick with a peak and tune job on the original configuration. Galaxy DC-521S (4 wire) 1- Shield 2- Yellow 3- Red Radio Make and Model: cobra 142 gtl PCB Number: pc-385AE PLL Number: MB8719 Test gear available: dmm, analog multimeter, dummy load, oscilloscope, soldering iron, RF frequency counter. Modification #2 replaces both driver and final. Replace the big electrolytic cap on the board from a 1000mf to a 2200mf or a 3300mf (its near the large transformer) - IIRC. But can't seem to find the what the Cobra 148f gtl mods 140GTL, 142GTL, and 148GTL Hints And Kinks 5 70 Author Message Skullman Page 2Posted on Thursday, May 13, 2004 - 1:31 am: thx for info tech548 i was thinking of putting a kl203 behind it will this amp do what it says?Page 3Posted on Wednesday, September 01, 2004 - 6:15 pm: Audiomonster, Both should take the: BKS-02004 Last night I did the clarifier mod on my new 148 but there are a few problems. I recently obtained a Cobra 148F GTL from a friend and I was thinking about having some modifications done to the radio. 965. Remove Q27 (located UNDER mic socket) 2. SHOCKER Member. all channel mods must be removed and components returned to original condition. 34V). 045. Here is a good set of power/audio mods for the Cobra 148GTL. I have barely touched a radio since I leftmy lab in 2000 but with the skip cycle coming in again I am back into again. I came across this video and have searched and searched for how to put in a 3 digit channel display like the one in this video and cant find Subject: Download links to mods for GTL hosted on NoGrip Tue 18 Sep 2018, 7:47 pm Every since I acquired my first 148 GTL I have been afraid to do anything but a simple peak on it because there are millions of different versions of mods out there for it (just like every other radio). Great transmit output and runs eit Copper Talk » Modifications » Radios » Cobra 2010GTL Channel MODS? « Previous Next » Author: Message 727: Posted on Sunday, February 24, 2002 - 12:40 am: Anyone know of a channel mod for the 2010? I have looked everywhere and can't find one. Variable power I dont see the need for really. Using BluePoint DVOM Cobra 148 GTL with a 8719 and 11,1125 crystal 26. 045 , Need the chart I can fill in the blanks slide 2ck up and 12 kc down Jan 4, 2025 @ BJ radionut : Hi jon here im looking for an open clarifier mod for a cobra 2000 that works seems the ones on the net dont work,does anyone have a step by step mod poss with pics that works,ive tried several on the net without the way i want it,thanks jon. This started before even touching Larry's Asymod Hi-Fi Asymmetrical AM & eSSB Cobra 2000 GTL includes the amplifier keyer function and all of the Hi-Fi mods and functionality that goes into a A page which describes how to align the Cobra 148GTL CB radio. Does anyone know what modification this is? Also an idea of what was changed to install this? If I remove it, appears to have no DC to the finals. r 174 and r 175 jumped out . Cobra 2000 GTL modulation mod. I sometimes have to back them out to get the unit working again. I modified that 142 GTL at one point to use both crystals with a second VCO coil to cover the range of the second crystal. Also, a good description of all the mods that could be done to this radio would be great also. Rick Technical Helper Posts: 1041 Joined: Sunday 4th Jun 2006, 0:52 Location: UK. My Cobra 200GTL is bare stock. Post by Goldfinger » Tue Feb 15, 2011 11:51 pm. Basically the NZ mod involves changing a crystal (X3) to drop the radio down by 635KHz (from 11. It is now dead keying 4 1/2 watts swing to 15 AM with 100% mod on AM SSB swings 15 watts and will swing 100% mod. 3. 33-41 Chnl. The radio has an AM pot adjustment inside so you can easily lower the deadkey – I set mine at 1 watt swinging 12 watts. One switch would control a relay that changed the crystal and VCO coil in use. Member. Sure your signal will look cool on the meter, but you won't be able to communicate further, you won't be louder, you won't get more power, and you won't have the high fidelity audio you said you You asked for the Cobra 21-LTD and those are the power and modulation modifications for it. The radio is in EXCELLENT CONDITION!! NO MODS Read more about the seller notes “Cobra 148 GTL AM/SSB CB radio made in the Taiwan. Please feel free to share stories, video gates, mods, pictures of Ok, TOLL FREE, I made the mods and found that I slid back one full channel (18 is now 19). Also the voltage swing on the end of R44 (800 ohm) is nil when I adjust VR402 (8. Opens in a new window or tab. Type: 10 meter (export radio) – will cover 11 meters after conversion. It sounded great but they guy needed a new audio amp IC every year or so. I am left with some questions. Volt Final and cut R131, Thats all that ever needs to be done to a 148/Grant! I usually get 20+ watts out on AM without the NPC crap! The 148/Grant swings way better than a cobra 25 or 29! Cobra 148 GTL with a 8719 and 11,1125 crystal 26. Thread starter Wire Weasel; Start date Aug 1, 2010; Wire Weasel Senior Moment. The center is at 9:30 and when i key up, it takes a second for it to settle on frequency. cobra 148 gtl chan display mod. If you want to allow more mod I highly recommend that you install a 800Ohm - 1KOhm resistor in series with the center leg of TR24 (cut the track and bridge the cut with the resistor, quick and easy), that ensures that the AMC still functions, but allows more Cobra 25 GTL/LTD/CLASSIC SAMS PHOTOS: 207 AM LIMITER: D-9 POWER TWEAKS: 1. Re: Cobra 148 Gtl Dx MK1 channel mod mod info please. Might be with the current pll on board. Change R108 (1 Ohm) to a . Easy mod for a few more watts without doing the NPC-RC. Volume, Squelch, and Dynamike controls on the front. Below are 2 modifications for the 148 GTL. I noticed that there are alot of mods. I have a 148 made in the Philippines (side mic socket). New posts RCI8719 Mods in Cobra 148GTL. For discussions on CB Radio Repair and Troubleshooting, do not post modification requests here, use the Modifications forum ! 9 posts • Page 1 of 1. 045 , Need the chart I can fill in the blanks slide 2ck up "MODS". Note that there is a limit to the number of files you can download. 8550, I remember back in the day you could buy expo kits that would help you achieve this but I The 142 GTL is a very easy rig to modify. 405 MHz NOAA weather channels (RX only) Modifications and fixes: Reviews: Popular Communications: A page which lists the adjusters for the cobra range of radio's. Today, we’re going to modify a Cobra 2000 GTL base station for BIG AUDIO. Chnl. com! Dec 29, 2010 487 439 73 413-West Tennessee. Bought a Cobra 142gtl and looked online to get a manual. I find that the variable power mods are really only useful to those who want to run one deadkey level when running barefoot, and one deadkey level when they use their amp. Cobra 142 GTL, D104 Eagle, Gonset GSB 201 MkIII 27. This document describes two modifications for the Cobra 148 GTL radio to increase power output to approximately 25 watts. Last edited: Feb 2, 2010. Thread starter SHOCKER; Start date Sep 28, 2009; S. Cut Trace on pin 14 of PLL and place 4. Change R114 to a 10K. Post by The Defpom » Sunday 30th Nov 2008, 9:33. Many a typical CB radio can benefit from some form of better Bias power filtration - a simple low-pass filter and as needed an extra BIAS filter cap and buffer resistor can offer even more levels of protection which takes care of that FCC Part 95 Free Pass I've modified this to specifically apply to the Cobra 2000 GTL. Thanks to Tim Trent and David Brooks for making this ra Joined: Saturday 5th Jun 2010, 5:51 First Name: Robbie Location: Brisbane. Will give all the channels the 148/2000 will off the 8719 chip (I added the a extra crystal that you will need if you wanted to get all the channels if need be , it's just a simple swap ,one for the other and the channel mod. Dec 13, 2008 3,187 844 223. Re-tune coils L10,L9,L8 for maximum forward power. I noticed the background noise (computer fans, etc. Looking at some of the other variations of modifications suggest shorting out R174 (grounding one side of VR402). On AM transmit and receive 100% but always in This Cobra 2000 GTL had all of the modifications undone and brought back to stock. One would be better off using both Rick's and the original schematic 148 GTL schematic. cobra 2000 GTL ???? Discussions on CB Radio Modifications. This is such a simple mod to do, all you need to do is remove R138, which is a surface mount resistor which is Did the mods you described. I have just purchased a fair cobra 1000. Many of you already know that the 148 GTL and Grant XL are the same radio. 5. It looks to have a channel mod with 3 position switch in the aux spot. CB BASE RADIO COBRA 2010 GTL WX AM SSB LOOK. Either buy an easier to mod radio, or take it to someone who knows what they are doing. Cobra 148-GTL issues. This Mckinley uses the same basic PC board as the Cobra 142 GTL and is more like like Cobra 140 GTL mobile. R181 is the feedback resistor on the 4558 mic preamp IC. Find a 13. dk. 1) Are the bottom-side components in photo 1 original? Resistor Capacitor Jumper Sleeved parts (two) 2) The following parts are missing topside; are Cobra 148 Gtl Dx mod info please. It appears that the mod is for extra channels. A better way to mod a >120channel 148GTL-DX receiver would be to broaden the response of the front end (27MHz) BPF and then make up for the extra loss this causes by rebiasing the front end amp for slightly higher gain. This will A bit rare over here in Australia, this is the Cobra 2010 GTL WX 40 ch ssb am and been aligned in ssb and working a treat. Reading Point Adjustment Description Value; OSCILLATOR: TP9: L19: 1iwilly wrote: ↑ 15 May 2022, 23:18 hello to all i have a cobra 148 gtl side mike made in Taiwan looking for some audio mods, not hi-fi not ready for that part yet and power mod also I know my SSB freq is off the only frequency counter I have is this one dosy FC-50 i Cobra 148 GTL with a 8719 and 11,1125 crystal 26. S. Remember this is a STOCK Cobra 200 GTL DX – the only thing that has been added is a DM-452 knock off microphone. LC, what you say makes perfect sense now that I think back. dxForums. I replaced many parts in vain starting with the Finals the MB3756 solved the problem. Joined: Sunday, 14 February 2010, 1:55 AM Real Name: lucas thibodaux. 3)Find J2 . Mods for the Cobra 148F-GTL DX CB radio. I couldn't find these in the search, so I reposted it. No mod limiter pulled, no pots have been touched or turned for power alignment. GENERAL: Type: Citizen band / "Freeband" / Export transceiver: Frequency range: 26. No feedback on the previous "Negative Peak Compression / Reduced Carrier mod aka npc/rc" inquiry. Symptoms: hi all this is my first post here nice site thank you. Modification 1 replaces only the final transistor, while Modification 2 replaces both the driver and final transistors. There were already existing holes from dxHome. Sep 27, 2010 363 101 53 56. MB8719 & RCI8719 should do all the tricks. Cobra 148 GTL-B Printed Circuit Board PTBM122DOX (Cybernet Chassis) RX: Change C135 to a 1uF non-polarized electrolytic Change C146 to a 1uF non-polarized electrolytic TX: Change C145 to a . Re the xmit & rcv mods work on all the different chips, for the most part. Buy It Now +$40. Hear is what I have done . I see the Cobra 200 GTL DX isnt very popular on this forum but I have a chance to pick up a new second production which states the PCB number is PCB # 200-GTL PFM-0090A- BE . Jan 22, 2019 509 160 53 56. Cobra 148GTL (PC-412) The PCB in this radio is almost identical to the Grant (PC-409) and the Madison (PC-411) and it can be used for comparisons. 2 monolithic cap. New posts Search forums. I've also added my own tweaks. I would not do any mods to one of the last Cobra 148 GTLs that was manufactured in The Philippines. ) in my room picked up (verifiying the mic preamp mod works). Where can I find a good website that gives some info on the Cobra 2000 GTL CB radio? As I understand, it's a great classic CB Base radio to have. Is there a way to unlock the Cobra 2000 GTL and keep stock Clarifier range? Thanks Mike 35 Is this an ok mod to do? Cutting the trace and adding a switch? If using pin 13 for channels 41-44 the channels come up on these channels. Anyone know first what k pot I need for variable power and what location on board do I have to tap into or remove to do this mod? As to swing mod same as above or is this one of those tricky cbs far as the Cobra 2000 mods are easy First, examine the speaker you have ON the radio - that one just may need to be reheated in the action of adding some extra solder just to free up the cone from getting caught in the spyder - the heat can help free the cone from being jammed - you can also use an Ohmmeter and unsolder those wires to it, remember the color code for it is polarized (again back to first Don't go for blue, It's very hard on the eyes especially in the dark. 5k ohm resistor 6-change C172 to a 2200uF 25volt The Cobra 142 GTL line was the little cousin of Cobra's flagship radio, the 2000 GTL There are a few mod's on the internet about this radio. Sep 28, 2009 #1 Ok so I have a 148 GTL side mic with extra channels. It has been since the late 1980s that I Cobra 148 GTL with a 8719 and 11,1125 crystal 26. it's the right way to do it. "142 GTL CUT R104 VR6, (ssb)VR7 " this is the most popular mod. The one regret from getting the blue 3 digit display in my 148 GTL is that I went for blue. DAK CB Radios; SBE – Side Band Engineers; STONER Pro-40 CB SSB Base Station #322; TRAM Diamond Corporation; TRAM D201 VFO RF SIGNAL FREQUENCY COUNTER CYMOMETER TESTER 0. I don't completely understand the advantages. Cobra Mods. Kit comes with easy to follow text instructions, and color coded wiring picture diagram. Next, solder the cathode (banded end) of a 1N4148 diode to pin 14. 6 Watt dead key swings to 30 bird on low-power peak of 105, 20 watt dead key swings to 60 bird on high-power 135 peak. Copper Talk » Modifications » Radios » Cobra 2000 GTL best frequency mod « Previous Next » Author: Message Gonzo Junior Member Username: Gonzo Post Number: 28 Registered: 9-2004: Posted on Wednesday, October 06, 2004 - 4:07 pm: I have a Cobra 2000 GTL that has uppers and lowers, however, I do not have to throw any switches to activate Cobra 150 GTL DX Problem Mod. I included a few pics of what I see inside. LC erf2030 low watts I replaced the stock 2075 in my 25 GTL with a ERF-2030 and the companion part EN-1230, I followed the instructions provided, removed R38, R40, and C45. Jan 4, 2025 Community platform by XenForo Cobra 148 GTL with a 8719 and 11,1125 crystal 26. The radio is in EXCELLENT CONDITION!! NO MODS WHAT SO EVER!! VIRGIN RADIO!! Cobra 148 GTL-B hi-fi mod. Looking back I should have got green or orange. For a very long time I been searching for a variable power and swing mod at no luck. It is 150K stock. Both modifications are approx. For example: When keyed up, it will go from 27. To my surprise it receives great but I am rebuilding a Cobra 2000GTL. The most notable able is the (1) 1st rf amp and (2)dioide swap and finally the (3)"Goldfinger" cap mod. I have fixed some radios for friends and the modifications they come with are always for extra channels. It is unknown if these modifications will work on older 148 GTL models. Poormans 192 Channel Mod - Cobra 142 GTL. The Exports can't touch the Cobra 2000 GTL or any of the MB 8719 chassis. 045 , Need the chart I can fill in the blanks slide 2ck up and 12 kc down Jan 4, 2025 @ BJ radionut : When you asked about "loud signal blast" I went back to an old Cobra 148 that has a mod in it that uses the R43 AGC out line as a tap point - to go to D15's Banded end - using a 1N4148 and a simple 2. 35-43 Chnl. which chip is in the radios made after 96 or 97 seems to be a case of what was available the day they made a particular I bought an old cobra 87 GTL the other day. 325MHz to 11. Cobra 146 GTL Realistic TRC-453 Uniden PC-122 & AR-144 Uniden Pro -810e Base PC122XL. Hi gday all,new to the forum,I have a cobra 148 gtl dx mk2 which I am in the process of modding there will be six bands via a new six band switch I have the conversion details via the relative diode links to the ic6 and ic7,this will give me the lo lo and hi hi. The only thing was the MB8734 PLL was not available. You can turn the ALC The original board had mods done to it and they took the phone plug out and put in a channel switch, which I see is a very common thing with these radios, I just about cry when I see this kind of thing done to these radios. NO CLIPS ! lightly tuned at 4 to 16 on AM and around 20 on SSB. Swing mods don't do anything useful. Also applies to: Cobra 148GTLF Cobra 2000GTL Undien Grant XL Uniden Grant LT 1. 8VDC output point on the radio, solder the purple wire to that point and there is your 25 to 30 watt mod (along with the usual modulation modification and tune-up). This modification is known as the Negative Peak Compression / Reduced Carrier mod aka npc/rc. The original PLL was The mods that Justin Stahnke posted is the long way to get the 25 to 30 watts. the rig wont change frequency, channel display is OK but radio is stuck on channel 1 26. Change the 10k resistor between mic white audio wire and TX mods: Change C46 to a . Channel 9 switch to Channel 19: Cut D32. Brand New. -VR10 SSB. 045 , Need the chart My CB radio has finally arrived. 47 Ohm. Buy It Now +$6. I have replaced all electrolytic caps and removed the obvious modifications. RD250 Top Poster Posts: 1073 Joined: 04 Dec 2010, 14:06. Lots of space and easy to disassemble. Re: cobra 148 gtldx mods. A page with modifications for the cobra 148 gtl. MOD Meter. These are supposed to be the newest and supposedly have the previous bugs worked out. Hello guys, Im new here, and have a question. AM Signal Meter. 6950 after conversion. 4. I just picked up a 89 GTL for free because the meters don't work. Also have a Royce 1 Cobra 148 GTL variable deadkey mod. Sep 23, 2021 #1 I see mentioned many times about adding low channels to the cobra 29s with out an expo kit or xtals. This is due to the circuit being tuned to produce rated power at about half the output impedance as say a cobra 29. Join a vibrant community of like-minded individuals and explore the exciting realm of CB radios. Thread starter wcsd106; Start date Oct 24, 2010; W. 1125MHz) , however, once that crystal has been changed, all you need to do to get 27MHz is pull pin 10 of the PLL low (to 0V), that will cobra 140 gtl. I'm sure it's easy, I just don't have it here in front of me. 01uF non polarize cap 3-change-c18=47uf to a 330uf-to-680uf 4-change tr41 to a tip-41c 5-Change R228 to a 1. 045 , Need the chart I can fill in the blanks slide 2ck up and 12 kc down Jan 4, 2025 @ BJ radionut : This group is for the love, discussion,and general information for the famous Cobra 2000 GTL And President / Uniden Madison radios. or really just any useful mods you may have. Parts needed: 1 10 microfarad, 25+ volt electrolytic capacitor Wire or other suitable material to create jumper shunt A page which list's the modulation boosts and tune ups for the cobra range of radio's 140 & 142 GTL Channel Expansion & Clarifier Modification (See Note on Page) (Correction in Volume 5 Page 17) Cobra 2010 (Discontinued) The Cobra 2010 is Cobra's newest and best base station ever! This is a typical example of mis-information, the resistor changes listed below will not produce more This kit is designed to add the "extra channels" to your Cobra 148-GTL, Cobra 2000-GTL, Uniden Grant XL mobile units. PS this can be used for the Cobra 2000 GTL but you will have to change the PLL to a MB8719 to make it work. Finals were 30 cents 8719-192-l-plcc cobra 2000 kit instructions note: radio must be in original channel configuration. Sep 11, 2009 10 0 11 42 lompoc, ca. Pretty easy to keep a clean signal as well. Combined with the standard PLL mod I think it went from 26. 175 to 28. Copper Talk » Modifications » Radios » Cobra 148 gtl MMB8719 CH MOD (China 148 gtl) « Previous Next » Author: Message Drifter_8291 New member Username: Drifter_8291 Post Number: 3 this was on a Cobra 148F-GTL and this was the lowest that the PLL circuit was stable with the stock control crystal. The receiver also features increased protection against cross modulation and strong adjacent channel signals. can anyone direct me to a good site where there might be some nice mods for the 148 GTL to really push Joined: 07 Sep 2010, 14:59 Call Sign: 26TM360 Cobra 148 GTL/2000 GTL RX mod. Is the board the same as the 2000GTL? Thanks in Advance! 3's & 8's Doug Deerehead Keep a 1k fixed resistor in series with the POT. -R104 AM PWR- VR6 SSB PWR-VR7 COBRA 2000 148GTL PRESIDENT WASHINGTON MADISON MOD. Thread starter Aztec; Start date Dec 2 , 2016; 1; 2; Next. Cable Guy Packaged by weight, some settling may occur. 515-27. 1. Today, we're going to modify a Cobra 2000 GTL base station for BIG AUDIO. 2. Once you go crazy looking for an item on Rick's nice clean schematic you can find it on the original from Cobra schematic. Manufacturer - Cobra Model - 148 GTL D Fcc ID - BBO3K2148GTL other numbers on back is G505022769 Board Number is KEPC-332-E6 Cobra 2000GTL in the shop for it's 50 year check up, close enough to 50. HELLO, is there any mod"s for loud modulation and better recieve for my cobra 2000 GTL ? at this point both are very weak, i am using an Cobra 148 GTL with a 8719 and 11,1125 crystal 26. As far as i remember the radio was useing a MB8719 pll ic which was highly moddable the pcb was the same as the Stalker IX, Realistic TRC-490, Uniden / President Washington, PC-385 PCB i have seen them with an fm Cobra 2000 GTL modulation mod. This mod can also be used on other radios that use a MB 8719 PLL to get a 10 Khz jump. If that is your case, and you do decide to do this mod in the future; go with the way Sonoma posted. $375. Try about 270 ohms. 58 watchers. We will post any news/modifications here as soon as they are tested. best of luck. 2K Resistor - looking this ACG section over here - reminded me that if nothing else, this mod applied more of the AGC difference signal that goes I saw another mod in a cobra 2000 that used a large (by comarison) audio transformer off the output of the audio amp. 34-42 Chnl. email is I replaced many parts in vain starting with the Finals the MB3756 solved the problem. I would like to be able to have the frequency coverage expanded so i can roughly cover 26. It involves rewiring the clarifier and either changing the PLL or changing the downmix tripler into oscillator(s). Change R43 (10 Ohm) to a 2. What do you do, specifically to drop the carrier on AM and get forward power on AM. thanks 941 Cobra 87 GTL - What to Do? Thread starter HomerBB; Start date Feb 2, 2010; HomerBB Sr. Some are simple and others more elaborate. This page shows the mod to get a 10 Khz jump on a Cobra 142GTL. no clipping needed and no swing mods necessary. Joined: 14 Jun 2010, 09:28 Location: Dunny On The Wolds. RF Meter. 3k) to a 1k (located near mike socket) 2. Way back when, and way way back when this mod was done full tilt. Cobra 148 GTL with a 8719 and 11,1125 There was a thread here, but I couldn't find it. What you usually find is the mk2 148 will start to generate funny 'owl' hooting noises on FM mode as you tune down your newly added super low Cobra 148 GTL with a 8719 and 11,1125 crystal 26. 045 , Need the chart I can fill in the blanks slide 2ck up and 12 kc down Saturday at 11:02 PM @ BJ radionut : CBTricks has the mod for the 148GTL with the ERF2030. Remove power from the radio. Jan 29, 2010 7 0 11. The goal is to super mod this rig. The Cobra 21 GTL is a very simple radio but it has all the right features. The same board was used in the Cobra 2000 GTL. 045 , Need the chart I can fill in the blanks slide 2ck up and 12 kc down Jan 4, 2025 @ BJ radionut : I'm performing the Poormans 192 Channel Mod from the files section at "the mod yahoo group" on a Cobra 142GTL. Post by RD250 » 12 Dec 2012, 22:55. Using BluePoint DVOM Yes, but it's not a mod for a newbie. 0650 to 29. To obtain maximum performance please read carefully the descriptions and operating instructions in Cobra 148 GTL with a 8719 and 11,1125 crystal 26. this is COBRA 142 AND 140GTL MOD. Jan 29, 2024 #9 Would that be the I bought this radio with a couple of Cobra 25’s and 29’s a number of years ago. Most 148's will do 18 watts peak with very little modification. Post by RD250 » 20 Nov 2012, 00:00. Thanx I picked up a Cobra 146 GTL (I had owned one about 5 years ago and remembered it performing very well) for a song and dance and threw it in the mobile. PWR-VR11 Channel , clarifier,and audio mods for radios that have the mb8719 or RCI8719 PLL If your radio has a MB8734 pll change it to a MB8719 COBRA 140 , 142 GTL , PRESIDENT WASINGTON AND Cobra 2000 GTL, low receive. Was supposed to not TX at all but pleasantly surprised to find out it does. It is at the front of the radio almost in the center. 00 shipping. 045 , Need the chart I can fill in the blanks slide 2ck up and 12 kc down Jan 4, 2025 @ BJ radionut : Also curious about doing a variable power mod to this as well so i can set it up to run with my texas star 667 Ideas opinions?-222- Reply. 1 of 2 Cobra 148 GTL with a 8719 and 11,1125 crystal 26. If you could please delete this thread (as I cant), I would be thankful. One of the wires became unattached on the underside and Im not sure were it goes? COBRA 2000 GTL channel mod wire off? Thread starter Crambone; Start date Oct 4, 2019; C. 965-27. peace, haans . Nov 19, 2009 246 6 28. I have ordered a Cobra highgear modulated power mic, for $20 + shipping and handling I do not expect stellar performance from it but rather a slightly better sound for now until I can get a better mic. dss56 Well-Known Member. presteps; replace the mb8734 pll with an mb8719, mmb8719 or a rci8719-99 pll. the Mod that is out for the Cobra 200GTL DX is only part of the Mod doing the mod by only pulling the R138 gives you the 11 meter band But it dont Xmit on 10 Freqs per band you would need to add the following step to finish it to work and Xmit on all the 11 meter Freqs In the Picture for the 2nd batch of Cobra 200 GTL DX Radios as in the “Cobra 148 GTL AM/SSB CB radio made in the Taiwan. I can't find stock meters for the life of me and would love to replace these. 045 , Need the chart I can fill in the blanks slide 2ck up and 12 kc down Jan 4, 2025 @ BJ radionut : A cobra 140 GTL, I gather that this rig is the same as a 142. Carrier Adjustment: VR10. Alignment. Thread starter dss56; Start date Sep 23, 2021; D. The purple wire mod is the TP-8 wire for the newer GrantXL layout. With Cobra 148 GTL with a 8719 and 11,1125 crystal 26. 7uf and R158 to 470k ohm). 385 LSB Cobra 200 modded w/2SC2879 Finals Yes, but it's not a mod for a newbie. So any help would be great. If you want to allow more mod I highly recommend that you install a 800Ohm - 1KOhm resistor in series with the center leg of TR24 (cut the track and bridge the cut with the resistor, quick and easy), that ensures that the AMC still functions, but allows more Cobra 148 GTL with a 8719 and 11,1125 crystal 26. can anyone point me in the right direction on where a good list of 1000 mods are. I was reading on here where the Cobra 148 has a mod that does not extend the slide range it only unlocks the Clarifier it was posted by Nomad. This page shows mods for the Cobra 150 GTL. CB Beam Antennas; CB Cobra 148 GTL with a 8719 and 11,1125 crystal 26. We are also somewhat dissatisfied with the SSB audio quality considering this is a Cobra radio. 045 , Need the chart I can fill in the blanks slide 2ck up and 12 kc down. 7 Ohm. The original information pertains more to the Cobra 148 GTL than the 2000. So I claim no originality here Hello everyone, This is my first post! Thanks for letting me join your forum! I was about to modify a Cobra 148GTL with the 6 position rotary switch mod dxHome. Move the jumper 4)Remove the frequency counter module from the radio. cobra 148 gtldx mods. 045 , Need the chart I can fill in the blanks slide 2ck up and 12 kc down Jan 4, 2025 @ BJ radionut : Cobra 148 GTL with a 8719 and 11,1125 crystal 26. (you are missing out if you are not in my frames !) AMC: ALC: AM POWER. Did a normal once over, correct fuse, nothing inside burnt but I did find 2 loose parts inside, never a good thing. Thread starter Dark Star; Start date Jan 7, 2021; 1; 2 The Cobra 29 mod adds missing parts to the radio so the carrier can be controlled. I have channels in it now but when I looked around for mods there didnt really seem to be much out there that I foundjust soemthing about an audio limiter which can be cut and one or two pots for power. This is a Snake Radio Customs Cobra 2000 GTL build and Modification. 385 LSB Cobra 200 modded w/2SC2879 Finals Connect with CB radio enthusiasts at CB Radio Talk Forum. Replace stock final with a 2SC1969 transistor. I have bought a Cobra 146gtl which has the clarifier unlocked already. 02 shipping. Aug 1, 2010 #1 Got one of these in recent trade. Alignments. Re: Cobra 2000 GTL. When it comes to Cobra 148/2000GTL receive mods there seems to be only a few. 36-44 When using pin 13 to get channels 41-44 no bridge resistor is required. 1152 to 27. My COBRA has the upper and lower channels added via the NB and CB switches. I'm having the Doc perform the elective surgery in addition to the full revamping, including hardwood floors and crown molding. pesso por favor que leigos em eletronica nao se atevao a fazer tau ato de modificação pois fica por conta em risco você Radio Make and Model: Cobra 2000 GTL PCB Number: PCB-497 PLL Number: 8719 Test gear available: Symptoms: Frequency locked What is working: By switching the channel selector is always transmitting and receiving the channel 1 When I select USB or LSB the frequency of transmission and recepição lost. Extra Channels. Coppernob wrote:Hi gday all,new to the forum. If you have some stuff that not is listed here you can donate this by contact mods. i would like to do the rc/npc mods along with the channel mod. it's the freq expansion that doesn't work on 8734 chip & SOME of the freq expansion doesn't work on MMB8719. 045 , Need the chart I can fill in the blanks slide 2ck up and 12 kc down Jan 4, 2025 @ BJ radionut : Power Increese for Cobra 148 GTL: 09 Apr 2008: Peak voice sensitivity for Cobra 2000 and 148gtl: 10 Mar 2008: Extra channel modification 3 switch version for Cobra 148GTL: 19 Dec 2007: mod submission for cobra ssb 8719pll chassis (cobra 148gtl) 12 Mar 2007: cobra 148gtl 10-meter conversion: Click here to view all the ABOVE modifications for Cobra 148GTL & Uniden Grant XL Unlocked Clarifier Mod. I did the super modulation swing mod (shown on this site in the How-To section) on all of the radios including this one. For discussions on CB Radio Repair and Troubleshooting, do not post modification requests here, use the Modifications forum ! 4 posts • Page 1 of 1. 045 , Need the chart I can fill in the blanks slide 2ck up and 12 kc down Community platform by COBRA 148 GTL CHANNEL MOD. ok what am i doing wrong . When this mod is used the switch stays in the center (off) position for normal use, to activate the mod just flick the switch either up or This is the manuals page for Cobra. My brother has a mk1 cobra 148 gtl dx and has asked me to do the channel expansion mod for him. Top. Frequency range: 28 to 29. I might be able to get one at a fairly cheap rate, and a D104 Mic. (C158 to 4. 001uF ceramic disc or mylar converte o cobra 148gtl aos mosfet finals. Same board as the Cobra 142 GTL and Washington base station. removed R 44 . belfiglioval Dead Key Posts: 22 Joined: Monday 24th Sep 2007 Post by belfiglioval » Saturday 29th Sep 2007, 19:32. The power output is about the same as what you can get with the stock radio tuned up good, though. Channel Modification. scottishtommy Member. 7 MHz from factory – 26. Have a Cobra 1000 GTL base. my question is, are these good performers. 045 , Need the chart I can fill in the blanks slide 2ck up and 12 kc down Jan 4, 2025 @ BJ radionut : This is a known problem on the mk2 Cobra 148GTL-DX if you try and add super low using diodes on the binary adders and do no other PLL mods to improve the PLL stability on the bottom end of super low. Parts Only. derosnopS. So, sense it's not here, I can't just figure it out by looking at it. . Last night I did the clarifier mod on my new 148 but there are a few problems. 1-Cobra 21 2-Cobra 21-A 3-Cobra 21-GTL 4-Cobra 21-LTD 5-Cobra 21-LTD Classic 6-Cobra 21-Plus 7-Cobra 21-X 8-Cobra 21-XLR If you have the 21-LTD "Classic", then the mods are a bit different than the standard LTD model. 5150 to 27. In this page you find schematic, users and instructions manuals, service manuals, technical supplement, leaf leads and other good stuff. 045 , Need the chart I can fill in the blanks slide 2ck up and 12 kc down Jan 4, 2025 @ BJ radionut : Mods for the Cobra 142 GTL CB radio. 045 , Need the chart I can fill in the blanks slide 2ck up and 12 kc down Jan 4, 2025 @ BJ radionut : I can dig that kaos. Change R76 (3. $14. There are other Cobra 21s also. This modification is for the latest production 148 GTL with 4pin microphone plug. wcsd106 Active Member. . Reply. galaxy Dead Key Posts: 38 Joined: Tuesday 1st Nov 2005, 20:10 Bought a Cobra 142gtl and looked online to get a manual. That schematic alone could start an entirely new post on things that people have found wrong on that schematic. -R131 AM PWR. One wire is off, not a big deal if I get it working I am removing the mod. I would like to increase the output power as much as possible on AM and SSB. The heat dissipation of the 2sc1969 in these platforms goes way up compared to the increased output power. The problem is I like my 148 too much to experiment on it so I am asking if anyone knows of the best way to mod this radio. It does NOT affect sideband! Volting the final is not in the same category as the NPC mod. and what kind of mods if any can I do to increase performance. Estas modificaçoes deve ser realizadas com aparelhos para verificação de tençao espectro analizador e precissisos watimetros pois com um bom conhecimento no que esta fazendo. Jan 4, 2009 Better TX performance without severe mods? Thanks. Cobra 148f DX+. It is unknown if this modification will work on previous 148 GTL units. 1)Disconnect the power cord and microphone. I have a Cobra 2000 GTL that the Clarifier is not unlocked. i have googled my brains out trying to find any info. like new condition in a package deal with a Motorola maxtrac. I purchased a Cobra 2000 GTL and am trying to remove the mods from the radio - I removed the rotary switch style PLL mod, channels back to normal. GENERAL: Type: Citizen band transceiver: Frequency range: CB 26. Cobra 29 classic LTD/GTL low channel mod. Let me take a look at this mod and i will get back to you on it. 1695 and tx 27. This was posted a while back as a complete set of mods for audio: Also applies to: Cobra 148GTLF Cobra 2000GTL Undien Grant XL Uniden Grant LT 1. It's all show and no go. Post by astradyne » 19 Feb 2011, 19:19. Suits Cobra 146, Realistic TRC451, DSE Hornet 2, Uniden PC122 and AX144 etc Cobra 148 GTL with a 8719 and 11,1125 crystal 26. Remove the covers and locate the TMP87PP21DF Microprocessor( see Picture ) near the front right of the unit. If lower carrier is desired, change R196 near VR-10. Fuel your knowledge, unlock secrets, and engage in discussions. Google "upd2824" and you should get all the info you need. Cobra 148 GTL with a 8719 and 11,1125 crystal 26. Next, solder the anode end of a 1N4148 diode to pin 11 of PLL. As my first post, I'd like to know if anyone has replaced the meters with something other than stock. Benefits charity. 1835 when the radio is in chanel 19 . ↳ Radio Modifications; ↳ Shortwave Radios / Scanners; ↳ Sideband (SSB) The Cobra 148 GTL, Washington base, Cobra 142 GTL all have the PLL you need. The radio's real performance is its receiver. Post by fat boy » Wednesday, 29 October 2014, 15:32 PM. 045 , Need the chart I can fill in the blanks slide 2ck up and 12 kc down Jan 4, 2025 @ BJ radionut : Note: Older 29's (LTD and GTL) use the same basic procedure, but instead of re-using the caps, place a 100pf across C62, a 68pf across C59, and 22pf across the spot where you removed R55. Is the board the same as the 2000GTL? Thanks in Advance! 3's & 8's Doug Mods for the Cobra 150 GTL CB radio. The cheap and cheerful way to broaden the response dates back about 30 years and I think quite a few people did these mods. Change it to anything from 470k to 1M. Copper Talk » Ask The Tech » Modifications » Cobra 2000 gtl clarifier mod? « Previous Next » Author: Message Sandbagger106 Intermediate Member Username: Sandbagger106 Post Number: 111 Registered: 11-2002: Posted on Sunday, November 30, 2008 - Hello r/cbradio, I am looking for modification suggestions . RADIO MODIFICATIONS Frequency Conversion Channel Chart (After Modification) (On One Page) Channel Chart Cobra CA Series 1- Shield & Black 2- Red 3- White 4- Blue . SuperSwing Mod for the TRC 453, TRC 465 and Uniden PC122. 1 MHZ ~ 65 MHZ; CB Radio Antennas . took brown wire off of fvl and took the red wire on the other side of the fvl and moved it to pin #1 of ic4 and now on rx im on 27. I Support WorldwideDX. 00. 2)Remove the covers of the radio. 7K across cut. 045 , Need the chart I can fill in the blanks slide 2ck up and The following is a list of the features that have changed between the Cobra 2000 GTL & 2010 GTLW: (+) Improved (=) Same (-) Worsened Cobra 2000 GTL Cobra 2010 GTLW Stock Mic + Power Desk Mic External Speaker - Internal Speaker Speaker 1 &2 Switch - 1 External Speaker Output Fine/Coarse Voice Lock (Clarifier) = Fine/Coarse Voice Lock (Clarifier here is a working list of power/audio mods for cobra 148-gtl/2000-gtl 1-change-r114-to-10k 2-change-c46-to-. Locate and R The mod is for survival - not necessarily a pass for the FCC Part 95 test. Cobra 2000 GTL Meter (Mod or RF PWR)- Generic - White needle. This page describes modifications for the Cobra 148 GTL (PC-412) The PCB in this radio is almost identical to the Grant (PC-409) and the Madison (PC-411) and it can be used for comparisons. As for mods, I'd just give it a good tune up and add a 10KC shift on the CH9 switch. Modifications. Crambone Well-Known Member. The COBRA 2010 GTL WX has a vastly superior receiver which includes noise blanker circuitry and a switchable automatic noise limiter. 045 , Need the chart I can fill in the blanks slide 2ck up and 12 kc down Jan 4, 2025 @ BJ radionut : COBRA CB RADIOS MODIFICATIONS; Cobra 2000 GTL Modifications; CPI – Communications Power Inc. 175 to 28 Taking a nice radio like a Cobra 2000 and doing a swing mod to it is butchering to me. 25 watts. Hey there, guys. Anyone know of a channel mod for the 2010? I have looked everywhere and can't find one. A used Cobra 148 GTL that I got while helping friends clean their deceased uncle's place (along with 5 other various mid sized units) with 75-ohm cable and dual Firestik antennas mounted high on west coast mirror struts, 4-pin Diesel noise canceling mic to right angle adapter to 4/5 pin adapter. gpihvyq smiwiu kmz fvwo dhju rqaqbahi azwypc gtill uxja stwqs