Re: Orbitsonic 200; Microphone Wiring Question

"Michael A. Terrell" <mike.terrell@xxxxxxxxxxxxx> wrote in message
news:4637B569.D1DE9318@xxxxxxxxxxxxxxxx
Beloved Leader wrote:

My city is halfway through its annual special pickup. On Saturday
afternoon, I found a 40-channel Orbitsonic 200 mobile transceiver. It
had obviously been left in a basement for quite some time. I opened it
up and blew out the dust with compressed air. Then I hooked it up to a
motorcycle battery, and the display lights came on. There was no
microphone with it, so I can't determine whether it receives or
transmits.

There aren't exactly a whole bunch of hits at Google for "orbitsonic,
" but it has that circa 1977 look to it. My guess is that it was made
by a contract manufacturer and sold at truck stops or at mom-and-pop
CB stores. A plate on the back identifies the importer or distributor
as the Samn (or SAMN; it's upper case) Electronics Corporation of
San
Francisco. One of the switches on the front panel is for delta tune,
and another is for "ANL." There is no FCC ID code that I can look up.

The microphone plug on the front is a 5-pin DIN-type connection. I've
seen some CB microphone wiring diagrams on the 'Net, but before I go
connecting pins at random, I'd like to hear from anyone who is
familiar with this radio. I've got some other 40-channel CBs, so I
will be able to hear any transmissions it makes. I see Radio Shack
sells, or used to sell, a microphone that fits this connector, and I
intend to go to a Radio Shack store to see what the pin-out is for
their plug.

Thanks in advance.

FCC ID?


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

Mike I'm not sure if I'm understanding you correctly - if you're asking him
if he could provide an FCC ID - which he said he couldn't find - OR - if
you wondered what he was refering to. MOST CBs (supposed to be all) - should
have an FCC ID Number on it - showing it is type certified. IF he could have
found that - he could have went to the FCC Database and looked up that
number and got "some" info - maybe even a schematic.

The OP "could" try Rec.Radio.CB - but good luck - all I've seen there when I
last looked - was arguing and name calling. Not worth my time to read it. IF
you could take a pic of the circuit board - top and bottom - someone "might"
be able to look at it and cross it to a manufacturer. Radio Shack AND Cobra
make 5 pin din plug mics - and not always compatible wiring. You could try
to wire a mic yourself if you have basic knowledge of electronics. You can
use a VOM - one lead to the chassis of the set - and ohm out the mic pins.
The "GROUND" and "mic shield" will/should show dead short. The "mic" shield
might be a hair above ground. But - the relay/PTT line and mic hot pins can
be found fairly easy too. IF you turn the set on - you can try using a
shielded/insulated probe wire and touch each pin - the other side to chassis
ground. Whichever pin you hit and keys up the set - that is the PTT line.
Its a sure bet that particular radio uses an audio return line through the
microphone to allow the receive audio to be heard. That means a mic matching
that radio HAS to be plugged in for you to hear anything - not that the set
has any defect "necessarily". So of the 5 wires, 2 grounds/shield - plus te
PTT line can be found rather quick - leaving 2 pins left to play with.

Uniden made LOTS of boards for people before their own sets were being made.
There are other companies too. As I said, a picture of the top of the PC
board and bottom - might help reveal the manufacturer. Also - the front of
the unit, back may be of help also. Anyplace there is a control, input,
output. Some "feature" to be compared.


.

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