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Cobra 148 gtl adjustment points?
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Cobra 148 gtl adjustment points?
Very early 148's had the fixed value too, according to the schematic. Adjusting Longboards - Adjusting longboards requires a bit of know-how. it has its advantages over a standard 148 gtl in its ability to cover more frequencys and have more modes of transmission. (Power up the radio, put it. You will find a wide range of features and functions built into the Cobra 148 GTL DV receiver to give you maximum communication. I see the adjustment pot, I can adjust it back down for longevity sake. Nov 4, 2005 These are above and beyond the conversion and talkback modification. For M/A Com/Harris/GE, etc: there are two software packages that program all current and past radios. 7 degrees Celsius, or 148 Methanol is also known as methyl alcohol and has the chemical composition of CH3OH. Methanol has a melt. 148 NW ST: TSB-10017. Rather, it is an acronym for federal legislation called Consolidated Omnibus Budget Reconciliation Act With the 100% subsidies expiring in October, now is probably the time to find a cheaper Obamacare plan. Cobra made a model one step higher known as the 2000 GTL. The microphone connector is of a four-pin design and the whole connection is designed to maximize space. These radios can be c. I see you found out, the original 148-GTL is an audio screamer on transmit, without messing with the other adjustments, other than using a good grade power. I've seen them go for much more and much less, but the 150-200 range seems about average for a clean unmodified radio that usually includes the matching external speaker. Switchable Noise Blanker - For increased noise reduction. At least, the 148 GTL non-NW/ST version has proven to be quite stable. I am also looking for a "clarifier" mod. Read the SWR along the top scale of the meter. im looking to recap this radio as well lots of caps do not match the values on cb tricks thanks. The Cobra 2000 GTL citizen's band base station radio demonstrates the epitome of contemporary CB base station design. Where should I probe to make sure the board is getting between 128v because I am having my doubts this is proper place to measure (at the meter lights). When the lowest point has been reached, switch to Channel 1 and then to. I used the cord and complete guts of hand mic to make it work. Cobra 148GTL DX Service Manual Pages 1 to 31 Early Version. weak modulation is a different problem than no modulation. The Cobra 2000 GTL uses an 11. Higher value (obviously) increases the delay. 40 channel solid state. It was opened and modified for extra frequencies and unloc. It operates on the 40 CB (Citizens Band) channels, allowing users to communicate with other CB radios in their vicinity. Geberit AG / Key word(s): Annual. We want what the original Cobra 148 GTL can do. It has 4 slide switches underneath radio. Post by cb4ever104 » 13 Nov 2015, 07:47 wa10 wrote: and no way to adjust it to align it other than repair the fault, Size Size Size. Following that the Cobra 148 GTL DX "late" model was also marketed as the Superstar 360 FM. Need to raise the carrier to 2 Here is possibly the best mobile vintage ssb radio ever built. 4 #1 I recently came by a tatty, very used Cobra 148GTL which needs some TLC (More than I expected sadly so I may just end up passing it on) One weird thing is when I transmit on AM, my voice comes through the speaker. I was able to increase the output power of mine to 12 watts AM/ 20 watts PEP SSB. A Connex frequency counter will not work. HERE YA! GO FOLKS A COBRA 148 F GTL DX + RARE BIRD MADE IN TAIWAN NOT MALAYSIA THEY WERE PRODUCED IN VERY SMALL NUMBER FOR 1 THIS IS THE RADIO EVERYONE WANTS SO GRAB IT THE PRICE IS GOOD BECAUS UNIDEN Grant XL and COBRA 148 uses the same jack - so if they replaced the jack with non-oem, they may have reassembled it wrong not realizing that a ground lug ring from the case is also needed - required due to the Hot audio ground and it's ability to operate in Positive and Negative Ground vehicles at that time - the lug mounted internally. COBRA 148 GTL- knobs and switches (20239) 99 Seller's other items Messages Location Mar 13, 2022 I have an older Cobra 148 GTL. http://wwwcom/products/cobra-148-gtl-classic-cb-radio- Enjoy the benefit of long-range SSB communications in a no-frills, super reliable. Oct 14, 2012 · Hello, I am wanting to adjust my deadkey on my Cobra 148 and my Uniden Grant XL. Cobra 148 GTL Side Mic Faceplate Decal CB Radio Any Design/Color Galaxy Uniden. Cobra 148 GTL Front Mic Face Plate Decal CB Radio any Design/Color Connex Galaxy. The speaker is gone and in its place is this big ugly board that looks like it came out of an. (Power up the radio, put it in LSB or USB, set the mic gain to minimum, remove the wire from test point 8, insert a milliamp meter in series between the test point (which is positive) and the wire, key the mic, and adjust VR9 until the meter reads 50 mA Set the final bias to 100 mA. Active Member. The Federal Communication Commission (FCC) limits the maximum power a CB radio can transmit at 4 watts. These radios can be c. Do you connect this signal to pins 1 and 2? The original 148GTL was actually introduced in the mid-1970's. This radio transmits good in both modes. Just picked up a very nice early 90's Cobra 148 from its original owner. The older 148's and 2000's had a 12 ohm resistor at R183, the newer radios had a 10 ohm resistor. I have replaced the switch (it was nasty). Adjusting to parenthood takes time and patience because of the plethora of changes. 73s a todos! Group created only for Radios Cobra. Counter PCB Schematic 148F GTL. Also included is an extra long nine foot mic cord so long reaches in a big truck are not a problem! More Cobra 148 GTL AM/Single Sideband Benefits: Feature 40 AM and 80 SSB Channels. The thing that bothers me more is the fact that the circuit board in the INTL version doesn't have any relation whatsoever to Cobra's 148 line up. Done Tuning a Regular Cobra 148 GTL for some Big Modulation back in October 2022. I recently purchased a Taiwan made cobra 148 gtl. No surprise there - eh? Would putting in a better quality 9 volt voltage regulator help this radio out? The 148GTL-DX is without doubt a great rig. There aren't any shops locally and I don't know of any reputable shops that accept mail Ins. Learn 5 things to know about adjusting to parenthood. GENERAL: Type: Citizen band / "Freeband" / Export transceiver: Frequency range: 26855 MHz in three bands. VINTAGE Cobra 148 GTL SSB CB Radio - Parts or Repair. Everything worked fine with the exception of the SSB s-meter alignment (Step 7 of 3. Press in, again, and release to turn off radio. Basic alignment tx / RX, modulation (100% MOD), and RX sensitivity adjustment (30MODCOBRA 148 F GTL RESTO MOD FOR DANIEL IN CALI. This radio has been a standard 'go to' radio of CB fans for decades. While not mandatory to add services, if service items ordered total less than $20 the service amount will be adjusted to $20. Cobra 148 GTL-B Printed Circuit Board PTBM122DOX. by frogman296 » Tuesday 3rd Mar 2009, 0:37. i recently purchased a cobra 148 that i know nothing about. It has had all electrolytic capacitors replaced, returned to stock condition, and realigned. 3 on the built in SWR meter and then falls back to 1. Advertisement When a child enters your lif. 6) Adjust VR11 for maximum PEP on SSB. Receive signals can also be monitored through PA. Basic alignment tx / RX, modulation (100% MOD), and RX sensitivity adjustment (30MODCOBRA 148 F GTL RESTO MOD FOR DANIEL IN CALI. stretched nipples gallery The Cobra® 148 GTL is a full featured radio with 4 watt AM and 12 watt SSB operation. Posted on Thursday, September 29, 2005 - 1:39 am: Hi, my cobra 148gtl (new make) transmits off frequency and frusterates me that there is no nob to correct this. Adjustable Dynamike Boost Dynamically boosts. Over the years, Cobra® has done a good job keeping the CB radio models that work in production. Follow the wire (white or green) from R44, remove the other end from the PC board, and connect it to constant +8 volts (IC4 pin 3). Radio Stations Cobra-electronics Cobra 148 GTL user manual pdf download free [0 Related for Cobra 148 gtl manual de servicio Ford 1300 tractor service manual Issuu converts static files into: digital portfolios, online yearbooks, online catalogs. AM/SSB RadioThe Cobra 148GTL features 40 AM and 80 SSB (Single Sideband) channels (40 up and 40 down). President Grant, followed by Uniden Grant and Cobra (made in the same time period, with later model Cobra's coming in last. How to bias the driver and final transistors 3. So, I unsoldered the center lead from where it was, turned the radio on & touched the center lead to TP3. Advertisement Depending on your purposes, there. A wire now goes from the now-separated wiper of the trimpot to the. By continuing to shorten the antenna you will notice the SWR reading will reach a low point ; Cobra 148 GTL | 148GTLE_Eng-Spa - Page 6 982 Southern Nevada #1. New posts Search forums. TX Power: 10w FM/AM, 12W CW/SSB. It has had a lot of things done to it as far as putting in the Commstat 200 VFO. nissan crate engines for sale Only nylon tools; or you risk breaking the ferrite inside the cans. If R183 is 12 ohms, change it to 10 ohms. mods/peak/tuning can be done to it without making it sound like a monstrosity. Press the button on the microphone and adjust the SWR CAL knob until the needle is on the triangle marker in the upper-right corner of the meter. Hiya, I have Cobra 148 (PB-010 chassis)which has suffered at the hands of the screwdriver and blowtorch brigade over its 30 year lifespan. I need another radio like I need a hole in the head, but I put it on the air for the heck of it and found that it's off frequency by about 200hz (which apparently. This takes it out of the circuit. Your other radios may not have the carrier totally supressed on SSB, and need adjusting. klondikemikescapkits 144inBama, Shadetree Mechanic and Back_Crick_Hobbies. Re: Cobra 148 GTL/2000 GTL RX mod. If you would like to help us put more manuals online support us. Hello, I am wanting to adjust my deadkey on my Cobra 148 and my Uniden Grant XL. the VR to adjust for modulation in the 148gtl is VR7, located in front of the big soda can looking capacitor toward the rear right. A small adjustment can make a huge difference in receive or not. However, following installation of the SC106, I am unable to get the UK band channels to centre in the middle of the coarse tune with the 5K trimmer pot supplied with the SC106 kit. I've undone all the evils committed against it and just need to realign it back to factory spec.
You're bidding on a very nice Cobra 148GTL. The microphone connector is of a four-pin design and the whole connection is designed to maximize space. Post by Rick » Saturday 19th Apr 2008, 10:40 As for bad SSB TX audio, check the chassis screws also check the final and driver bias, C150 can cause some odd problems in this area. 28 Mar 18, 2022 Hey: Guys. for all those that had /still have or ever loved the good ole cobra 148 gtl dx in any shape or form one of the best , if not the best radio ever made for cb radio. Factory Service Manual ( Covers 148GTL, 148GTL ST, 148 NW ST) (dated 1997 1998) Pages 1-15 The average going price for a 2000 is about $150-200. Everything worked fine with the exception of the SSB s-meter alignment (Step 7 of 3. blacked ambushed Learn 5 things to know about adjusting to parenthood. Go To the page for the Midland CB Radio's Tuning Chart (part 1) Go To the page for the Midland CB Radio's Tuning Chart (part 2) Go To the page for the Realistic CB. I seem to have located "bits and pieces". Thank you for your time! Would anyone be able to post a step-by-step, basic, rundown of the correct order of procedure and potentiometer-adjusting for a dy. zodiac wrote: I thought you wanted the test points for adjusting the frequency not the bias. The bias shorting plate on the DX allows you to measure the bias current of the driver and final transistor. The original information pertains more to the Cobra 148 GTL than the 2000. I am also looking for a "clarifier" mod. plugged it in and had to adjust the frequency a bit but otherwise seems to work fine. To transmit a continuous tone, install switch S2 as shown. Values below 1k would be inadvisable. Built-In SWR meter Allows matching antenna for optimum performance. gamma-ray-graphics (2,570) 98 VTG Cobra 29LTD WX Classic 40 Channel CB Radio NO Mic/Pwr cord 1996 Powers ON.
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Cobra 148 Gtl Mobile Cb Radio. Factory Service Manual ( Covers 148GTL, 148GTL ST, 148 NW ST) (dated 1997 1998) Pages 1-15 The average going price for a 2000 is about $150-200. solid state citizens band ssb/am. Only members can see who's in the group and what they post Anyone can find this group. By changing it to a lower value, the delay is decreased. Cortland Street Chicago, IL 60707 PRINTED IN THAILAND ©COBRA ELECTRONICS CORPORATION 1997 480-241-P-001. kaos513 said: something strange i encountered i believe this 148gtl has a wierd bias driver adjustment. This data is all over the net, and the only thing that is correct is item #3 below and it too is not necessary if you change the "stock varactor" to an ECG 612, in most radios that this mod applies to, Cobra 148 GTL, Cobra 142 GTL, President Washington (MB8719) ect. another good mod for the mk 2 is adding low low band on the tone switch in the low position. If the radio still squeals, the microphone sensitivity of the radio is too high. Received this radio brand new in the box. Includes 10 business days handling time after receipt of cleared payment. Seller's other items US $59 1 bid. Dual Conversion AM Receiver. bage industries Proyecto en donde logre hacer funcionar el ajuste de IF, y los ajustes para las frecuencias de bandas laterales, en los cobra es + - 1. It basically is a Cobra 148 with the Frequency Counter and some push buttons instead of the standard switches. Page 8: Section Iv Operation. (This link will open in another window) This is some handy software that I wrote to assist with modificationsby telling you what is possible and what frequencies will be generated for a given PLL type and radio chassis, it can also help teach people more about the theoretical operation of. Any help would be appreicated. Page 1 to 31 (148GTL DX Early Version) Page 32 to 63 (148GTL DX Late Version) Diagrams. Dec 18, 2008 · Set the driver bias to 50 mA. View and Download Cobra 148GTL-DX instruction manual online. Along with all that, this model has a dual conversion AM receiver with maximum frequency response and controls designed to be easy to use even. Set your COBRA 148GTL to Channel 21. Re: cobra 148 gtl-dx SSB TX audio problem. Your other radios may not have the carrier totally supressed on SSB, and need adjusting. hammer0630 Active Member. Adjustments for Better PerformanceVarious adjustable settings are featured. View and Download Cobra 2000GTL user manual online. They used the same footprint but got cheap and picked the lowest bidder to make the board. Cobra 200 GTL DX CB / HAM Radio 27 Willam Geary ELEFLOW 2SC2312 RF TRANSISTOR TEST Keaton Birt Cobra 25 LTD Classic - CB Radio Review 1:58. wyoming highway 59 road conditions Delivery: Estimated between Thu, May 23 and Wed, May 29 to 23917. Don't know the number used in that generation of 148GTL radio. This document describes two modifications for the Cobra 148 GTL radio to increase power output to approximately 25 watts. The hash chokes were burned up, and the protection diode blown. This should put it on the ssb calling frequency 27 You should, during the day hear lots of signals. Jun 24, 2020 · As far as the alignment went, all the test points are right on after some adjustment going through the process185 at the antenna connector, I was initially low on voltage for pin 1 on the PLL but that adjusted out to the 3 Dec 18, 2008 · Maybe moreso; as it is far more stable on SSB than a Galaxy 959 or a Ranger TR-696 Freedom 1. Installing a good one will restore the full sound of the receiver audio Hello all, I have a 148gtl and want to do the tune up on it. On AM this radio will deadkey around 4 watts and swing upwards to 8 -10 watts (this is with the limiter intact and no mods). Manufacturer's Suggested Retail: $219 Your Price Only: $189 Your credit cards and checks are welcome! 12 Watts Power SSB RF Output. Nov 4, 2005 These are above and beyond the conversion and talkback modification. It doesn't do that in the other 2 positions. "super-mod" for it, which I think he said would make it carry 12 watts and. Features - Volume/Squelch Dynamike RF Gain/SWR Cal RF/CAL/SWR Knob AM/LSB/USB KnobThe Cobra 148F GTL is unique because it came stock with a built in. (Yet I heard from someone that you should not cut the. http://wwwcom/products/cobra-148-gtl-classic-cb-radio- Enjoy the benefit of long-range SSB communications in a no-frills, super reliable. 4. Remove the AM/Regulator feed wire for the final from TP-7 and solder it to. the Cathode of D-55. It's your gross, or pretax, inco. Get top content in. sendel trailer wheels The frequency counter is only a 5 digit counter. Try setting USB on frequency with the knob pointer at 3 o'clock instead of 12 o'clock. 5) Adjust VR10 for maximum PEP on AM. More Items From eBay. Features - Volume/Squelch Dynamike RF Gain/SWR Cal RF/CAL/SWR Knob AM/LSB/USB KnobThe Cobra 148F GTL is unique because it came stock with a built in. " 11060MHz to 28. Press the PTT (Push-to-Talk) switch, and tap the antenna (making it shorter). Thanks View and Download Cobra 146gtl instruction manual online. Just fitted a CPI base mic to my Cobra 2000 GTL for ease of use. Both rigs have the approximate same dimensions. realistically all you need is 4 bands on the mk2 or five if you want to cover uk40. by MM6eco » 11 Feb 2016, 05:26. Go To the Cobra 148 GTL DX Mods Page Go To the Cobra 148F GTL DX+ Mods Page Go To the Cobra 150 GTL Mods Page Go To the Cobra Audio Modification And Tuning List Go To the Comanche Warrior Freq. It apparently had been hooked up backwards at some point in its life. After about 1992-93 The 148-GTL was made by several companies, and none were Uniden. However, after years.
Hello im looking to get a cobra 148 gtl question is should I get a new one or look for a older model ? I have heard that the new ones are junk true?? if I get a old one where should it be manufactured thanks for the help Made in China = Junk Old school 148/Grants/Texas Ranger 296 are the best. COBRA 148 GTL-DX CW/AM/FM/SSB 11 Meter CB radio!!! The radio has Auto Noise squelch fitted to it as well as a UK40 27/81 band Eprom!!!! The radio is a 4 bander ie UK40-Low-Mid-HI band's on the band switch. You can buy points or you can get point for every manual you upload Upload your manuals. Good chance that all 3 modes can be set on frequency this way. free robux generator no human verification or survey 2021 Liability of damages to any equipment is the sole responsibility of the user! Downloading, viewing, or using any information provided on these pages automatically accepts the user to the terms of this agreement! 11,738 Louisville, KYnomadradio Monday at 5:41 AM If it's a 1979 Cobra 148GTL it probably has a handful of electrolytic capacitors gone bad from age and mileage both. CONTROLS AND INDICATORS There are eighteen controls, 2 meters, 1 LCD and 1 jack on the front panel of your 2010 GTL WX CONTROL FUNCTIONS 1 Press in to turn on radio. Manuals and User Guides for Cobra 148NWST Cobra 148 GTL ST ; Cobra 148GTL-DX ; Cobra 148 NW ST. 13 Jun 18, 2018 Hello everybody have virgin Cobra 148 GTL (TAIWAN) mint in the box and I'm thinking of getting it. kirklands pendant lights chassis of the radio Remove the top cover plate and tighten all the screws around the edge of the 4. Ok here is one I did to my 148 (new china made) that has a MMB8719 (*I AM NO TECH IT WORKED ON MINE BUT DO AT YOUR OWN RISK*) Cut trace to pin 14 between the cut put a switch when the trace is open (cut) you get ch 37 to 40 27445ch 4 is one of the B channels 27095 ch 16 is 27 Sr. This is a video overview of the Cobra 148 GTL AM/SSB CB Radio. Service Manual. If R1 is 68 ohm, will give a Carrier of about one and a half Watt Dead Key and an Audio Swing of about 12-14 Watts PEP. If the receiver audio comes back, but weak and tinny-sounding it means the capacitor is shorted. the chicken shanty Switchable Noise Blanker - For increased noise reduction. I can still remember hearing a Cobra 148 that left an impression on me back when I first. To increase the coverage of the Fine knob, a resistor goes from the CCW lug where we pulled. Cobra has really shot themselves in the foot with this new radio, why you ask? I'm getting to that but first let me say that Cobra has been the industry leader in producing good quality CB radio's down through the years, there was the great line of Mobil "AM" radios such as the 25LTD, 29LTD. Cobra 148GTL CB Radio Zippo Solid Brass Vintage 1994 Cobra 148 GTL Joels Auction.
A page which lists the adjusters for the cobra range of radio's RadioMods Cobra 148 GTL Alignment page. Far left corner vr is the driver adjust and to the right of it is the final vr adjust. However, after years. Radio Cobra 18 RV Service Manual. put your 2 fingers on the board. If you want less power output on SSB (for use with a linear for example) you can adjust the mic gain or reduce the output power internally by turning back the ALC control. 3-Cobra 21-GTL 5-Cobra 21-LTD Classic 7-Cobra 21-X If you have the 21-LTD "Classic", then the mods are a bit different than the standard LTD model. 148 GTL DX: VR6-L13: VR5: VR4: VR2-VR3----L21: 100 GTL-VR11: VR10: VR7: VR6: VR1: VR2: VR3-L59: L22: L23: VR5: 2000 GTL: RV501-L305,L306- ADJUSTMENTS: NOTES: If the talk-back volume is turned too high, acoustic feedback can occur which. I do not recommend cutting R131 which limits the modulation. The problem seems to be in the actual. it has its advantages over a standard 148 gtl in its ability to cover more frequencys and have more modes of transmission. The Cobra 148 is chrome faced and the Galaxy 949 is flat black. radio was clipped but based on reports from others isnt as loud as my stock 148 which was also clipped. The maximum allowed by law New Listing Cobra 148 GTL CB Radio UNTESTED $70 or Best Offer 0 bids Vintage Cobra 148 GTL 40 Channel CB Radio Mic & Speaker Untested *No Power Cord* Pre-Owned · Cobra99 Free shipping. The first or "early" Cobra 148 GTL DX used an MB8719 and was made by Uniden with a PC879 board. Microsoft Word - cobra_148_gtl_sm_pg31_pg47. 103 Jan 4, 2022 I am beginning to work on an early Taiwan 148GTL. 3% positive; Seller's other items Seller's other items; Contact seller; US $25. Only nylon tools; or you risk breaking the ferrite inside the cans. Radio was stock and untouched. In this case, Cobra is simply playing off of the 148's reputation of dependability. And the dual conversion receiver means you will be able to hear them. rara snzai This data is all over the net, and the only thing that is correct is item #3 below and it too is not necessary if you change the "stock varactor" to an ECG 612, in most radios that this mod applies to, Cobra 148 GTL, Cobra 142 GTL, President Washington (MB8719) ect. You got a top and bottom case, a full set of knobs (Cobra type, not 3900), an adhesive vinyl inlay for either Cobra or 360FM (the 360FM ones are still sold by them on eBay), and a. The FCC approved SSB CB radio market in the U has been small for quite a long time (Galaxy DX 949, Galaxy DX 959, Galaxy DX 979, Galaxy DX 2547, Cobra 148 GTL) so the introduction of a new option for consumers is good news for the CB radio community. Cobra 148 GTL SSB CB Radio - No Mic Or Wires. Loz! A page which lists the adjusters for the cobra range of radio's This page lists the adjustments for the Cobra range of radio's. If the radio doesn't transmit, there may be a wiring mistake somewhere or the VCO may need adjustment. 40 AM and 80 SSB Channels 40 AM, 40. Divorce, illness, or a new job can spark an. Jyd: Posted on Wednesday, March 27, 2002 - 6:21 pm: r-131 is the one you clip for modulation,it is by the front i think Mobile CB Radio AM/SSB Mobile CB Radio Cobra 148 GTL! Professional driver-requested improvements include a front panel microphone connector for convenient in-dash installation, 9 foot microphone cord for easy reach anywhere within the cab, and tactile controls for added convenience and safety when adjusting functions. Find the GREEN WIRE located at point 54 and UNSOLDER it Resolder this GREEN WIRE to POINT 14 (8 Adjust AM power for no more than 5 watts dead-key - if running a linear amp set at 3 watts dead-key Cobra 148 GTL POWER TWEAKS: 1 Change R126 (10k) to a 2 Change R124 (10k) to a 4. The 1994 RCI model is much the same as those by Uniden. Hi Everyone, I have a Cobra 142 that was gifted me by a good friend who picked it up off eBay. Adjust VR10 for the AM power to max it out, (Counter clockwise) Adjust VR11 for the SSB Power. Receive signals can also be monitored through PA. florida craigslist cars Gainers Helius Medical Technologies, Inc. I would like to add a few Good Mod's to the radio Mod for Cobra 148 Modifying the Cobra 138XLR is straight-forward and fairly simple if you have relatively steady hand and a low-powered soldering iron with a tip that has been ground to a small point. Electrolytic capacitor kit for Cobra 148 GTL & Uniden Grant XL (PC-412) This kit is based on the main board PB-412AD. How it Works Log In / Sign Up My Files 0; My Downloads 296392;. Hello, Looking to restore a 148 clarifier back to stock, need info on d75 (diode) part number or new replacement diode that would work. At this point you should have 180~200% positive peaks with no flat topping and put a 1N4148 diode and a 500 ohm pot in series in place of the 1. My other mk2 radios are a very tidy and original SS360FM PB010 AB and my mk2. Cobra 148 GTL. pdf) or view presentation slides online. Publication date 1983-01-01 Topics "instruction manual" transceiver cobra 148gtl Collection manuals_various; manuals; additional_collections Language English. Look at the block diagram you will see the audio flow from sql switch , volume vr, etc and work through it starting from the audio chip and work along the audio chain until you find the issue. The frequency counter is only a 5 digit counter. Removed radio from the box and opened it up to perform the frequency conversion so the radio can transmit and receive on 11 meters (CB band).