Found a Pacific SSB-800

From the web -

From another forum - "Only ever had one with FM fitted as standard most were only ever AM/SSB.

MC145106 PLL and six 11mhz crystals and [if i remember right] the FM board is the 7mhz IF type."

Doesn't appear to be a bad radio. Has a decent receive for sure. If it works, clean it and try it out. If that is an old Telex RK56, then I would try using it. If not try a different mic. Just some food for thought.

Gashog said:

Powers up but no audio at any volume. No static.
Switched between PA and CB and I hear the speaker "pop" a little bit while switching.
The meter light dims in CB mode and gets brighter in PA.
I didn't key the mic.
I found a schematic on CB tricks

Click to expand...

If you are interested in restoring this radio, please start with replacing the electrolytic capacitors and cleaning all the switches/controls with contact cleaner.

That would be a good place to start, you may find that the radio really has nothing wrong with it at all, just some bad caps!

Gashog said:

Agreed.
I believe this radio, circa 1980, would have bad electrolytics by now.
I sent a Cobra 25 out to Loosecannon and he found at least two that had shorted.
He gave her the full treatment and it's good as new.

I'd like to see if I can pick out on the schematic which cap may be shorted, causing the power draw and no audio.
I don't want to throw parts at it and cross my fingers, even though we all know a recap is needed and would probably fix it.
I'd like to learn something with this one.

Click to expand...

It is recommended (and indeed at most times crucial) to remove capacitors from the circuit to test them. You will need a way to test for continuity (digital multimeter), be aware that as electrolytic capacitors begin to fail the ESR value may go off the charts while the fault does not prevent itself as a dead short! (A capacitor can be bad, & not test as a dead short!)

I cannot say that I recommend replacing just a few capacitors as you would likely have problems down the road from the other original caps failling.

Looking at the schematic, from the DC input follow that and look for any filtering capacitors or electrolytics, if you had a DC filter cap that was shorted to ground I assume the fuse would blow immediately.

If you want to learn how to diagnose the radio, I commend you on your journey this path is short by no means.

I would recommend immediately replacing the capacitors and then see how the radio performs, someone once suggested that I learn to discern the DC path from the RF path in the schematic.


When you're testing the radio make sure it has a microphone plugged in, try an external speaker, make sure you have a 1 or 2 amp fuse in line and also attach an antenna to it, some radios will not produce any audio without an antenna/microphone. (You may already know this, but I'm adding it to the thread for good measure.)

I hope this helps.
-LeapFrog

I often use a Craftsman multimeter, it will not give you an ESR test, but you can test for continuity to see if the cap is flat out dead (they fail "short circiut" often),when the probes touch and you hear a "beep" you're on the right setting. Meter has a very limited range of capacitance it can test through, if i'm in doubt (if the cap is too large for me to test) I just replace the cap!

[The sockets found on some of the cheaper meters are used to test transistors not capacitors, but a cheap tool like this can be handy for all kinds of things, the Craftsman meter I have is a "True RMS" type certified for high voltage saftey specs, but the dang meter will not read caps larger than 5uF,the user guide for the meter has the specification of range]
*Be aware your meter may have a very limited capacitance range it can test*

Yeah it seems to me at one time all three parts had been used together, I love me a good auction never know what you can find!

Is the PLL a CCI3001? If so, it's the same board as the Pace 8093 mobile and the Royce 1-642 base.

~Cheers~