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doffo's latest activity
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Ddoffo reacted to TM86's post in the thread So much for resale value (TRS Challenger 1400). with
Like.
Yep. And I already dealt with a roach infested radio. Then there was the one that had been in a heavy smoker's home. Took leaving it... -
DOn that amp I'm guessing the bias is adjusted by the blue stand up pots somehow if thats what they are. Theres one for each pair of...
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DThat model uses a class-A audio amplifier. Not so different from the 1960s Delco AM car radios that had the fat doorknob transistor on...
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Ddoffo replied to the thread M4000 Amplifier.Good eye. I was thinking about throwing a bid at the amp, but it may be a bit too much of a task for me to try and lower the bias on it.
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DThat one also has the same resistor burning up. Top left above the relay, with the super long leads.
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DThey were biased hard as built I think @bob85 quoted almost 10 times the required bias current as built. Making for a clean signal...
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Ddoffo replied to the thread M4000 Amplifier.I suppose without pictures of the inside, is reducing the bias current a good thing or was that opposite of what it needed to be? This...
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DIt was when it was built. Might or might not be now. 73
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DYes, they were biased when built, however many units were modified to reduce the bias current in the wild. 73 Jeff
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Ddoffo replied to the thread M4000 Amplifier.Ok........I will call it upon myself....... ***Riiiiiiiiiiiise from your grave!! :D But mainly because if this amp is truly an AB...
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Ddoffo replied to the thread So much for resale value (TRS Challenger 1400)..Sadly many radios probably fall in this category. Never know what is inside. (Better than a roach infested radio, but the roaches died...
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Ddoffo reacted to TM86's post in the thread So much for resale value (TRS Challenger 1400). with
Wow.
Grabbed this from the Bay of Fleas a while back. If you look closely you may notice a dark streak down the face of the radio about... -
DAfter dear hunting today when I got home I turned my base station on to 16 lsb for the heck of it and for the first time I did hear some...
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DI would love to reclaim 16 lower side. I have three really good side band 23 channel radios one is a Johnson 352 that I put brand new...
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DI have the ingredients for another homebrew Yagi for 6 meters. This one will be a 5 element LFA and will go on the mast where my HexBeam...
