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Discussion in 'General CB Services Discussion' started by space cowboy, Jan 1, 2014.
They were very nice radios, I wish I had never got rid of the one I had.
I asked the guy the other day about the sideband issue... Says it has no receive or transmit on either USB or LSB, dead air, no sound at all.
This is Midland's version of the GE Superbase. Exact same board in both radios, the "double-sided" PLL02A SSB chassis. Stay away from these like the plague unless you're just going to buy the radio for AM use only, or to put on the shelf as a collector's item. I've had several of these and the GE Superbase models come across my bench, all with the same issue, SSB problems. Some had no TX/RX, like this one, other has problems with SSB "bouncing frequency" under modulation. They look neat, but unfortunately, their performance is less than spectacular.
Most of the problems with these sets center around the connectors between the 2 boards. Assembly/disassembly stresses the connecting pins (and there are so many of the damn things) causing solder fractures everywhere. Now that these sets are 30+ years old, the connectors themselves are becoming a problem.
I only buy if they do 150% modulation at least. 130 is for noobs.
...In the hobby for two years, sort of new here. I am kidding in the above post
I hear you, I can't understand you because you're overmod, but I hear you.
130-150% modulation can sound great actually.
This is why I find cb so fascinating. It's fact and fiction all mashed up together
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I do have one that is on the shelf right now. I guess it will stay there a little while longer.
I know, people are led to believe anything over 100% is bad.
That is true but what so many people overlook is that it is going to require a reasonable degree of negative peak compression (and filtering after that stage) in order to prevent those 130% negative peaks from hitting RF cutoff. Without that I'll probably hear the signal several channels away if it has any strength to it.
True, but I think there is a lot of confusion over negative peak compression and positive peak expansion. NPC is used broadly as a blanket statement when I think PPE fits better in most cases.
10 seconds examining the waveform on a scope tells you all you need to know.