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I found a supplier of electronic components close by. They have the electrolytic 2.2uf cap in stock and I will try to pick it up today or tomorrow. I read an article specifically about that cap replacement. The article insisted to replace that cap with another tantalum cap. I suspect the...

Great thanks. The sideband chatter did not show up until after I found IC6 and R161. I suspect something I moved or disturbed caused the problem because it did not chatter at all before moving wires etc. I thought that voltage drop was funny also. It may be that it is the power supply however...

please post back the results of your tests. LC Black Friday Update....... The channel display is lighting. The meter bulb is bad so that is not lighting. The relay is working and working clean with a good snap when keying the mic. No power output on AM or Sideband No receive on AM or...

Thanks LC. I will try to start the testing today. It is turkey day so I cannot say for sure but will try.

Here is a Pic of what I believe are the wires from the cb/PA switch, one of the pots (tone or dimmer) and a purple wire with a white trace and snipped off or maybe broke off but it looks very clean and not insulated. The wires for the pa/cb switch were soldered but not shrinked. I used (dumb 20...

I guess it may be worth replacing those anyway. Not sure how many there are but I do remember someone selling kits to replace all of them. Is there a safe way to test them installed ?

I did not check those cb/pa wires but will later today and I suspect I soldered and shrinked them. I will also post some more pics as I noticed the power transistors looking a little stressed but if one or more of those transistors were bad, would that take out the receive mode also ? There are...

Hey everyone out there. New member here. I have a Cobra138XLR that I bought new in the late 70s. I heavily modified it shortly after purchase. 120+ channels, Add/subtract switch, open clarifier, peaked power spread through the channels. I did the mods guided by a good friend who past away...