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doffo's latest activity

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    doffo reacted to danmcclain's post in the thread Sams PhotoFacts Collection with Like Like.
    Thanks for the assist, guitar-199... Dan
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    doffo reacted to BC Coyote's post in the thread Reclaim LSB 16 with Wow Wow.
    Terrible conditions here today after weeks of great DX. A few powerhouses making it through but that's about it. Guess that X class...
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    doffo replied to the thread Reclaim LSB 16.
    I hope they are good for ya this weekend. I honestly made back to back contacts on 37 LSB on that old Kraco. Its been a blast. Looking...
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    doffo replied to the thread Sams PhotoFacts Collection.
    Just wanted to say thanks again. Today I had to get back into the old Kraco radio and make the AM power adjustment. Have a great day Dan.
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    doffo reacted to Rick330man's post in the thread Reclaim LSB 16 with Like Like.
    This is just a friendly reminder that starting tomorrow begins this week-end's UN-OFFICIAL WWDX DECEMBER 13th-14th SSB CB NET...
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    doffo replied to the thread Reclaim LSB 16.
    Just got it setup again. Will be ready for both Saturday and Sunday. :) (This was the Kraco from earlier this year I fixed on up. Got...
    • Kraco SSB De Luxe 23 Channel 2025.jpg
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    doffo reacted to Radiohobbyist's post in the thread Reclaim LSB 16 with Like Like.
    If someone is awake right now (0030 CST / 0630 UTC), I have my rig on 16 LSB. ;) Lonestar / 244 Dallas, TX
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    doffo reacted to TM86's post in the thread So much for resale value (TRS Challenger 1400). with Like Like.
    Little bit of progress. Wire brush removed most of the crud and rust. I'll hit it with some rust converter this weekend. Then I I'll...
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    doffo reacted to TM86's post in the thread So much for resale value (TRS Challenger 1400). with Like 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...
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    doffo reacted to Xracerx13's post in the thread M4000 Amplifier with Like Like.
    On 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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    doffo reacted to nomadradio's post in the thread Sams PhotoFacts Collection with Like Like.
    That 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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    doffo 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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    doffo reacted to Xracerx13's post in the thread M4000 Amplifier with Like Like.
    That one also has the same resistor burning up. Top left above the relay, with the super long leads.
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    doffo reacted to AudioShockwav's post in the thread M4000 Amplifier with Like Like.
    They 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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    doffo 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...
    • M4000 internal board.webp
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