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Cobra 138 23 Channel, SSB Manual


New Member
Dec 19, 2021
Hello,in need of the Cobra 238 23 SSB manual,need to allign,any help is appreciated. Thank you, have a great day.


Active Member
Jul 7, 2015
Looks like it may be Sams CB-57.
I have the Sams book for that radio, I no longer have a scanner but i can try to take a clear photo of it and post it later on this afternoon,IMG_20220617_152034.jpgIMG_20220617_152104.jpg


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Analog Retentive
Apr 3, 2005
Louisville, KY
I can share one nugget of experience with that model. Never, never never adjust VR15, the sideband ALC for more than 3 Amps max draw from the radio's power supply. We learned the hard way to check for this before the covers go back on. Reason for this is the main T/R relay. It's built with thermoplastic that gets soft if you run the relay too hot. Causes the hot and ground sides of the relay's power-switching circuits to sag and short to each other. Pops the main fuse, unless it has a "no-blow" fuse. Then it pops circuit-board foil traces. The relay has a pretty strict upper limit of 3 Amps.

That relay looks like an american-made 'cradle' relay, but the pins are not arranged the same. A japanese-made relay is the only thing that will work in that radio. The pins on the american-made type will line up with the holes in the circuit board.

But it won't work.


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  • @ kb9ghn:
    My first thought was the i.r.s. may be interested in a long term money making scam without proper taxes being paid..probably more than electronics involved.
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    My first thought was why hasn't someone paid him a visit. I mean, his address is posted above.
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    Good news! I opened an appeal case after eBay sided with superhawkwss6. I also opened an IC3 case & sent that information to eBay. Within an hour they responded, reversed their decision and returned all of my money. Unfortunately, superhawkwss6 stole my CB radio and eBay will likely not suspend or close his account, but rather allow him to continue his criminal activity. I think I'll still file a report with our sheriff's dept (the sheriff is a friend of mine) though I know this type of crime isn't worth their time. This guy needs to be stopped and I'm certainly going to do my best to make that happen.
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