Made an "every few weeks check" on OfferUp yesterday and found this listed about 2 hours earlier in my home town. Contacted the seller and it turns out he lived 3 minutes from my house. He had it listed for $30 and I just COULD NOT resist! A Midland 79-892 40 Channel SSB radio from around the 23 to 40 channel switchover time. PLL02A PLL in it and, of all things, the clarifier is on the microphone.
I put it on the BK 2040 and it appears to receive well in AM and on either sideband. S Meter works!
Just because it was quick to get to, I put it on the dummy load/spectrum analyzer and get a good strong carrier in AM. SSB just "looks a little wonkey". The carrier is suppressed but I think it could be better. Still looks a little too high in SSB.
AM XMT looks ok.
SSB XMT .... again looks weird to me. When I transmit on EITHER sideband... I see sideband peaks on both sides of the carrier position. At this point I am wondering about any necessary alignment in the balanced modulator area... OR.... any problems in "carrier shift" circuits that might cause the carrier to NOT shift and a little of both sidebands shows up in the output. But here again... the peaks look good power wise.
So, it is another one in my stash of radios to fool with in retirement (maybe sooner)... but at LEAST it works to some degree right up front.
And, yes, it IS awfully dirty but not badly banged up... and did have the original mic and power cord.
[edited to add]
Oh... and it has this little CW McCall signature tag mounted on the top of the case. Ahhh... those were the times!
I put it on the BK 2040 and it appears to receive well in AM and on either sideband. S Meter works!
Just because it was quick to get to, I put it on the dummy load/spectrum analyzer and get a good strong carrier in AM. SSB just "looks a little wonkey". The carrier is suppressed but I think it could be better. Still looks a little too high in SSB.
AM XMT looks ok.
SSB XMT .... again looks weird to me. When I transmit on EITHER sideband... I see sideband peaks on both sides of the carrier position. At this point I am wondering about any necessary alignment in the balanced modulator area... OR.... any problems in "carrier shift" circuits that might cause the carrier to NOT shift and a little of both sidebands shows up in the output. But here again... the peaks look good power wise.
So, it is another one in my stash of radios to fool with in retirement (maybe sooner)... but at LEAST it works to some degree right up front.
And, yes, it IS awfully dirty but not badly banged up... and did have the original mic and power cord.
[edited to add]
Oh... and it has this little CW McCall signature tag mounted on the top of the case. Ahhh... those were the times!
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