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Cobra 2000 speaker feedback problem I am working on a cobra 2000 and it appears to have talkback installed I am trying figure out how to disable it. I have done some searching but as of yet I have not found any talkback info on the cobra 2000, anyone ever play with this mod on this radio?

Does anyone by chance have any info on this amplifier such as a schematic diagram? I have a resistor getting hot, the unit still puts out power but obviously has an issue. I have been over to CB tricks but nothing listed as just a M4000. Thanks

Does anyone have the complete alignment information for the old Cobra 138 or 139 radios? This is the 23 channel radios. Thanks

This radio is in good condition and works great comes with Mic and power cord. $175 shipped paypal only please

Looking for some advice on servicing a President Grant CB this is and older one probably around 1977. I have searched around on the net for documentation but the best I have come up with is a blurry schematic diagram, the problem is as follows. No output power on Upper Side Band, but I can...

Anyone by chance have the complete alignment info for both the TX and RX for the cobra 139xlr? the receiver on this radio is a bit numb and want to go through the whole thing. Thanks

I purchased a new gain master antenna from H&Y Electronics ebay auctions only to find when opened the box it had a problem, the box was in good shape so it could not have happened during shipping I have contacted H&Y and they told me they forwarded the photos to Sirio and are waiting for a...

Ok here it is I am working on a Cobra 2000 with the following problem: When the radio is powered up it will draw approx 6amps in rx or tx and the final transistor gets very hot and there is no output power at all. When I pull the TP8 & TP7 wires off their pins the short goes away. I have been...

Any one know who might still stock this crystal? I am repairing a Cobra 2000 radio it appears to have a bad crystal and I am looking for a replacement… thanks

Holly smokes $1495.00 for a Cobra 2000, do you think he will get any takers? Maybe we should be investing in cobra 2000’s instead of gold. :wink: COBRA 2000 GTL N.O.S. 2000GTL AM/SSB/BRAND NEW THE BEST - eBay (item 280567818613 end time Oct-27-10 13:48:49 PDT)

Hello all A couple weeks ago was in a local HRO and was playing with a Yasue FT-2000 and really liked it but have still have a few questions before purchasing. 1) I have read some people have had problems with blowing the preamp on the front end when using and amplifier. Just curious how...

With regular dx openings happening on 10/11 meters I got interested in putting up a dedicated mono band antenna and found the Penetrator to be a great vertical performer. I have been able to find antenna(s) in older neighborhoods that the owner(s) where happy to see them off there roofs for...