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OVER 130% MODULATION!!!


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. :(

~Cheers~
 
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. ~Cheers~

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.

- 399
 
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.
 
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.
 
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  • @ BJ radionut:
    20 days to HAMVENTION!!! :love:
  • @ BJ radionut:
    NOTICE: The Midwest 6 Meter DX Group will be set up at Hamvention in Xenia...BOOTHS 9107-9111...COME SAY HELLO!
    +1
  • @ W4KVW:
    I mete KZ4RR there is 2013 for the 1st time & we live about 50 miles apart & had talked for many years. Traveled halfway across the country so we could finally meet. LOL W4KVW EM80wg
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  • @ BJ radionut:
    Lee/KZ4RR will be thr at XENIA this year again...will be great to see him...We work almost every morning on 6m SSB
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  • @ W4KVW:
    I will not be there but hopefully by the end of this month I will have my New tower and antennas back in the air including my M2 6M5X. The old tower and all of my antennas came down in October 2023 during a Hurricane.
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