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  1. Replies
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    LEDs can be run off AC. BUT I would use a...

    LEDs can be run off AC. BUT I would use a separate transformer or a wall wort with a rectifier and a PI filter. Easy and cheap.
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    Have you tried using a bass with active pickups?...

    Have you tried using a bass with active pickups? If it sounds good and you donít want a pedal... you might want to build an LPB1 on some perf board and add a switch to take it in and out of circuit.
  3. Have you checked out Amazon Prime? They have one...

    Have you checked out Amazon Prime? They have one day delivery and quite a selection of parts. I think Prime is a real deal. I buy a lot of stuff through them. Free on day shipping. Also get Prime...
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    It’s really affecting Apple too. My wife is a...

    It’s really affecting Apple too. My wife is a virologist (scientist not an MD). U of M alumni Enzo ;). She’s been warning about China for years. Want to get scared? Ask where your inexpensive generic...
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    We tested a bunch of it. And like I said, at sane...

    We tested a bunch of it. And like I said, at sane lengths in the audio spectrum there was no measurable difference. I’m sure some “golden ears” audiophile can “hear” the difference. But we couldn’t...
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    56905 I always liked this one...

    56905
    I always liked this one...
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    You canít just rewire the cabs?

    You canít just rewire the cabs?
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    I worked on large SS amps in a busy shop for 25...

    I worked on large SS amps in a busy shop for 25 years and never used a light bulb limiter even once. Some of the old TV guys did.. they were the only ones allowed to. I used a variac with a current...
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    This appears that be a series filament “widow...

    This appears that be a series filament “widow maker” type circuit but has an isolation transformer. Don’t see that often. That would be a hard PT to source (if it’s bad) since it has a 90vac tap for...
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    Iím grew up in San Diego County. Iím 64. Carvin...

    Iím grew up in San Diego County. Iím 64. Carvin was in Escondido so I was around them for decades. You could drive to their factory and buy stuff right there so there was a lot of it about... but...
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    Not all clear speaker wire.. but much of it from...

    Not all clear speaker wire.. but much of it from the last 30 years has one side stranded copper alloy one one side stranded stainless steel. Iíve taken it apart and used strands of it for specific...
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    Iíve had very good experiences using Express...

    Iíve had very good experiences using Express Parts. Iíve gotten great deals on big L Pads, horn drivers, knockoff speakers (mostly for stereo or PA use), and usually pick up crossover caps, etc at...
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    Your ubiquitous “clear” wire speaker has stranded...

    Your ubiquitous “clear” wire speaker has stranded copper and stranded (stainless) steel wire...
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    Itís got to be better! It has a tube!

    Handmade 64GB Orange Pentode Radio Tube USB Flash Drive with Wood Stand. Steampunk/Industrial Style https://www.amazon.com/dp/B00NB0QYPQ/ref=cm_sw_r_cp_tai_065nEbA5EB6VE
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    Iím very tempted to buy one just to see what it...

    Iím very tempted to buy one just to see what it really can do...
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    56849

    56849
  17. I hear ya Enzo.. My father was an aircraft...

    I hear ya Enzo.. My father was an aircraft electrician after retiring from the navy. I have more than a few of his tools that still work like new. Some of them pre WWII. He would have been 100 years...
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    If you can’t find a piece of junk board to use,...

    If you can’t find a piece of junk board to use, use perf board. After you cut the burnt part out use the piece as a patch with 5 minute epoxy. Then run your numbers across it. I’ve done this many...
  19. It will work with a less filtered power supply....

    It will work with a less filtered power supply. Maybe just disconnect some caps and resistors to isolate the problem. Worst case a loud hum unless you mess up the bias or something. I also might try...
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    Probably says 500 on the pot somewhere. Will...

    Probably says 500 on the pot somewhere. Will probably clean up if it isnít seizing.
  21. They use the same transistors all over the amp so...

    They use the same transistors all over the amp so you can swap them. The important thing with a diff pair is they have to have a matching hfe (beta). In the old days we used to have to get beta...
  22. Have you changed the diff pair? They are about $1...

    Have you changed the diff pair? They are about $1 from MCM last time I looked.
  23. There’s really nothing “special” about these amps...

    There’s really nothing “special” about these amps except they seem to have a lot of intermittent problems. But as Enzo will tell you.. you don’t hear about the thousands that work fine. The last one...
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    Unfortunately no.. but I saw a ďteaserĒ for...

    Unfortunately no.. but I saw a ďteaserĒ for them.. I actually opened up a ďspecialĒ email account for just this kind of thing.
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    Honestly.. they are available at Wish for $49......

    Honestly.. they are available at Wish for $49... don’t know the shipping cost.
    https://www.wish.com/
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    This isnít under $50..itís $150.. but it seems...

    This isnít under $50..itís $150.. but it seems handy. Max 150v rms input but you can use up to a 1000:1 probe. Iíve seen them on WISH for $50.
    Digital Oscilloscope Kit, 3 in 1 Universal Test...
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    Yep.. these ďtechsĒ had a chemistry lab tech...

    Yep.. these ďtechsĒ had a chemistry lab tech background. Even the PHD Chemist in charge didnít have a clue. No idea what that little ďMĒ meant lol! ďBut it says 20Ē!
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    There are so many low cost useful ones out there...

    There are so many low cost useful ones out there today that itís hard to say.. I can tell you I like one that has capacitor function (just for measuring value), a diode setting, and a continuity...
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