Cobra Cam 88 - Seek

[13RA1MB]

Hi there!

Sorry, but my english is not the best but I hope you understand me.

First, my name is christian and I come from germany.

I have purchased a Cobra Cam 88 in a very good condition. It seems to be
working but I don't have any schematic diagram or something else for that
radio. I need a tube description and also a schematic diagram to fine tune
the radio. (tube description = the names of the tubes)

Presently the original "Dynascan" tubes are in the radio.

I know that it gives the Sams Photofact Vol. 9 but I can't pay in america.
(no BidPay, PayPal, credit card or something)

So maybe someone here can help me? :roll:
And maybe someone can tell me the name of the microphone plug?
(that is a very big microphone plug :shock

Thanks for reading this message! I hope you can help me!

55+73 from germany / berlin!
lehmann.christian(at)web.de

 

[nomadradio]

Hi Christian,
The mike plug was used widely in the US for decades. On Public-Address systems, and on Motorola, RCA, GE and other brands of VHF-FM business radios.

The Amphenol part number for the plug was 91MC4M. They are probably not easy to find in Deutschland, the home of "DIN" connectors. Besides, they are not metric.

What we have done for old base radios using that plug is to remove the socket from the radio's front panel. The crimped metal that holds the black plastic insulator in the metal body is ground away, to release the insulator body. Once the insulator insert is removed, you'll find that a standard CB-type "4-pin" mike socket fits nicely inside the metal barrel. This works only if you can find the panel socket that is meant for "Front" mounting, one that has a round rim on the outside, and the nut on the inside of the panel. The nut is NOT used for this. If your socket has the nut on the FRONT, this may not work so well. The new 4-pin socket is secured inside the old socket's metal barrel using an epoxy resin glue, preferably one formulated to work well with metal surfaces. Here in the USA, the one that works best is called "J-B Weld". It probably is not sold in your neighborhood. Cleaning ALL traces of your skin oils with a good solvent is important to make the epoxy adhere securely to the metal surfaces. Here's a picture of the finished product mounted in an old Courier "Royale" CB base radio.

We wire the new socket to match Cobra/Uniden/Galaxy/Connex type mikes.

This may prove easier than tracking down an authentic 'antique' mike plug to match the radio.

73

 

[13RA1MB]

Hello nomadradio!

Sorry for my delayed answer!

I asked some cb-radio shops here in germany for this microphone plug
but nobody can help me. Presently I am waiting for an answer from
motorola. Maybe they can help me. I think the only chance that I
have is to replace the old plug with a new.

Thank you for your nice description! I am only a little bit sad if I must
replace the old plug.

Nevertheless I need a list of the tubes! Three of the tubes are in a metal
lining and on one tube there are no descriptions anymore.

Thank you again!