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Exitthirteen for some reason I can not find the mod you are talking about. I wanted to see what you had done. can you post the link to it. Thank you Sonoma

I have seen radios where they put a resister off the audio wire at the audio pot or even the audio wire at the mic. you need a rsister in line with the wire. some put 10K ohm and on up to control how loud the talk back gets. I did that to a cherokee 1000 base radio years ago and just had to...

the best I have found for this radio is using the relay talk back mod. it would be too hard to try to explain it to you . the best thing you could do is but the talk back mod you have to add to the radio. I see them ever so often for sale on the bay.

I was over there looking this morning and did not find what I was looking for. may be gone since a site stop working as you stated.. Tinypic could have let a lot get lost.

Sue from Australia had posted a update a few years ago on Cbtricks for a broadbanding method for the 148 etc radios. I am trying to locate it in all my saved files to post it. she is one of the best techs I have ever known. Loosecannon and Nomad know who I am talking about. she is very smart...

LC do you not have all the broadbanding info for this radio. if not I just found all the info KlondikeMike did up plus looks like you put a foot note on it,

see if there is a diode and resister right at the side of the relay. years ago I had an olkd radio act like this and found a diode and resister connected in line with the relay . both were bad and would short of the radio and blow the fuse. the one I had there was a 1amp fuse so that helps to...

after looking at the schematic Rick drew up D35 looks like the one I changed. its in line with the 11.325 crystal

look at the cap change and see if it helps. I do not know what diode position it is. about 20 years ago I did the st radio for my self. still have it I do remember the diode I put in its place was a svc-251spa diode. I believe thats the right part number.

here is the install for the channel kit which will help with what you are having. read the capacitor change in the 1st box about channels dropping out. http://www.cbtricks.com/miscellaneous/vco/expo/model_l.htm

here is a page from cobra that you might look at to see if your radio has had the campain done to it or not. http://www.cbtricks.com/radios/cobra/140gtl/graphics/cobra_140gtl_142gtl_148gtl_tb1226.pdf

here is a schematic Rick Jackson made up for the st models. he put lots of notes on it to help with the radio. see if this will help you. http://www.cbtricks.com/radios/cobra/148gtl/graphics/cobra_148gtl_sch_redraw.pdf

I have one of the ST 4 pin versions that the channels work well in. I had to change the varactor diode with one that came in a galaxy radio. that made it work better. in fact I have a L kit in it and it wotrks 40 below and 40 above the regular 40 channels now. not sure if it would help yours but...

never had one give out any rf noise. I have installed about 8 of them so far. Nomad does more repairs than I do so he may chime in if he has a problem with any other than not working.

forgot to mention most are about the size of 2 packs of cigs put together so they fit just fine inside the radio. https://www.ebay.com/itm/DC-12V-3A-5A-10A-20A-25A-40A-50A-60A-Amp-110V-220V-Power-Supply-LED-Strip-Light/123551379064?hash=item1cc43c6e78:m:mzpSnaqRQnafbF-chvQlS3g

here is what I look for to buy a 10 amp supply. you may want to ask the seller if they will go up to 13.8 volts also. I bought some that would only go to 12.8 volta one time. so look at what all is available...

I just go to the auction site and put in what I want and see what shows up. I have not bought any in a long time since I had bought a few some months back. I will see what they have available.

I just repaired one a few weeks ago that I had to look hard to see the trace blown. so get some strong glasses and a bright light to inspect the traces.

I have been installing the little 10 amp units in the cobra 142 and washington radios when needed. I have 2 new ones here right now plus a 30 amp unit for a high output radio. they have worked just fine so far. have not had one to fail.

I have a couple of the 1st CDL56 mics , the look a like for the RK56 mics and they seem to work just fine. they have just a little more audio than the RK56 mics I have. I have never tried one of the workman RK56 look a like mics as of yet since I have so many of the old RK56 mics. all I have...