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doffo's latest activity

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    doffo reacted to BC Coyote's post in the thread Magnum 2000 resistor repair. with Like Like.
    You definately need to replace that missing screw on the one transistor there because that transistor will run hotter than the other...
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    doffo reacted to Cable Guy's post in the thread ISO oscilloscope with Like Like.
    My main oscilloscope died today. It was an old Elenco S-1345 40Mhz dual channel. I am in need of another, at least as good but better if...
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    doffo replied to the thread ISO oscilloscope.
    Unsure what oscilloscopes most prefer these days. A couple of my friends have that Rygol branded O-Scope. They went as far as to...
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    doffo replied to the thread Magnum 2000 resistor repair..
    Hard to say just for how long they were burning stuff up... But as of now it is outputting power on each setting, just not as much as...
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    doffo reacted to BC Coyote's post in the thread Magnum 2000 resistor repair. with Wow Wow.
    Ouch. It looks like the whole thing has seen some serious heat.
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    doffo posted the thread Magnum 2000 resistor repair. in Amplifiers.
    Hello, The two amps came in today about half hour ago, and to be sure one of the amps wasnt too rusted inside, I had a peek inside, and...
    • Magnum 2000 amp resistors.jpg
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    doffo replied to the thread Small HF amp.
    I checked into a net yesterday... It was on 16 LSB. The gentlemen said they do it every Thursday at 7PM Central. Mother Nature ran into...
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    doffo reacted to SuperLid's post in the thread Small HF amp with Like Like.
    Winter time, is when the clunkers come out. We have random clunker nights on 16 LSB in my area. Preferably 23 channel SSB radios, but...
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    doffo reacted to DelR's post in the thread Sommerkamp TS-2000DX (gotta see this) with Like Like.
    There used to be a man in this area, went by Green Hornet (RIP). He was an outstanding radio tech, way back in the '70 to '90s, that I...
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    doffo replied to the thread Merry Christmas to All Worldwide.
    Merry Christmas everyone! I spent the day with the family and enjoyed the time. I barely got to my computer as of now lol. Least to...
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    doffo replied to the thread Small HF amp.
    Maybe next year I can bring back more of my radios from storage including that 23 channel Midland SSB. :) Someone at the time did etch...
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    doffo reacted to TM86's post in the thread Small HF amp with Like Like.
    VCO is easy enough. Audio amp chip is doable. Mixer IC is readily available. Final and heatsink could probably be robbed from another...
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    doffo reacted to SuperLid's post in the thread Small HF amp with Like Like.
    I robbed the final and heatsink, VCO, audio amp chip and crystal filter. I believe it has a bad mixer IC also. I know I stashed the...
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    doffo reacted to Smokinone's post in the thread Small HF amp with Like Like.
    First SSB radio I had, bought it new "peaked and freaked", at least that's what was written on the box. Talked all over the world with...
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    doffo reacted to TM86's post in the thread Small HF amp with Wow Wow.
    No worries, guys. You reminded me that I have a 79-892 here that was converted to 10 meters, and I don't remember if I unconverted it...
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