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  1. Agree with The Dude. It must have had the board...

    Agree with The Dude. It must have had the board pulled at least for a solder touch up or something.
    Yes the little 'bar' between heatsink and chassis can be installed wrong. But in working on...
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    Yes, I meant post #14, sorry (edited above). And...

    Yes, I meant post #14, sorry (edited above).
    And I'm mistaken, Q means 60mm, not dual. A is 45mm.
    Q1 is single, Q3 is dual.
    So if you can find a Q1, the wiper should be the same as the P1.
  3. Can you cobble together a 2 ohm 5W resistor?

    Can you cobble together a 2 ohm 5W resistor?
  4. I had thought about the same earlier. Whenever I...

    I had thought about the same earlier. Whenever I get an oddball low power amp that is delivering even less than I expect, I try different impedance loads to see if that is the issue. Sometimes they...
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    Have a look at the datasheet in post #14. As far...

    Have a look at the datasheet in post #14. As far as I know P is single and Q is dual. So I'd expect the wiper to be different.
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    You said you tried other power tubes, but have...

    You said you tried other power tubes, but have you tried another rectifier tube?
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    So from those good voltages, it looks like it was...

    So from those good voltages, it looks like it was the CF side that went bad? They (CF) do seem to be more susceptible to problems, and can be picky about which 'brand' tubes will be most reliable in...
  8. You should do the math and calculate the mV...

    You should do the math and calculate the mV reading across those resistors so you get the same idle current through the transistors.
    Not a big difference but might as well. They say approx. 3mV...
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    That's what I think too. I'm guessing maybe the...

    That's what I think too. I'm guessing maybe the rejects were liquidated and ended up on the market rather than being destroyed. In the video (post #7) you can make out the little tab he solders the...
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    The 2rcs is supposed to have a little tab, like...

    The 2rcs is supposed to have a little tab, like the rx. Where the rx has it below the tip connection, the rcs is supposed to have it to the left of the tip connection.
    He mentions it in the...
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    The part of the schematic I'm interested in is...

    The part of the schematic I'm interested in is the half power switch. If there is no schematic, you need to know if it's wired up right, or if it ever worked right, like The Dude mentioned.
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    The shell is supposed to be nickel or nickel...

    The shell is supposed to be nickel or nickel plated, not that it necessarily means you can solder to it. :)
    Attached is datasheet for it and for it's updated version. The newer x style has a tab. ...
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    Schematic?

    Schematic?
  14. There is also the cascaded inputs idea, you have...

    There is also the cascaded inputs idea, you have an unused channel that you can put to use.
    Like Boogie MKI or 2203 JCM800.
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    It's supposed to be nickel, not aluminum. Have...

    It's supposed to be nickel, not aluminum. Have you tried soldering to it?
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    Which side failed, the CF? What are the plate...

    Which side failed, the CF? What are the plate and cathode voltages when working right, and when failed tube is installed?
  17. Thread: 110v > 240v Q's

    by g1
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    It does sound like questionable design practice...

    It does sound like questionable design practice but I have heard of it being an issue as well. Seems to me what I read was more about over-heating issues when running some 60Hz xfrmrs at 50Hz, but I...
  18. Thread: Eden Nemesis NC320

    by g1
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    This schematic?

    This schematic?
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    Some people also swear by it for arthritis. ;) I...

    Some people also swear by it for arthritis. ;) I use it for bicycle chains too, very little fling-off.
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    Does this power amp schem. look right? I'm...

    Does this power amp schem. look right?
    I'm dealing with a similar one where the muting circuit that enables Q8 is causing intermittent 'no sound on power-up'.
    In my case some of the silk screening...
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    Well this is a good start. So far you need a...

    Well this is a good start. So far you need a 45mm panasonic EWA series and 10k, 20k or 50k should all work.
    EWAP1 indicates 45mm single type so that is the prefix you need.
  22. Like Enzo said, there was a crash and a lot of...

    Like Enzo said, there was a crash and a lot of the schematic download links are dead. Unfortunately you need to try downloading them before they can be trusted to add to a post.
    Even worse, you can...
  23. I think a whole volt difference between your +...

    I think a whole volt difference between your + and - 16V is a bit much (you said +16.2/-17.3)
    Your TR8 and TR10 base voltages should also be evenly above and below 0, so more like +1 and -1 at...
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    I guess you mean IC rather than F&T ?

    I guess you mean IC rather than F&T ?
  25. pdf of old 515 and mod attached

    pdf of old 515 and mod attached
  26. That file in post #2 of the linked thread is not...

    That file in post #2 of the linked thread is not working. The picture of the schematic in post #6 works:
    https://music-electronics-forum.com/attachment.php?attachmentid=24194&d=1373501076
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    Why these? One of the more critical aspects is...

    Why these? One of the more critical aspects is that the pins line up with the holes in the board. From what I can see from the datasheet compared to your pictures, the pins will not work. Am I...
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    I do the same a Helmholtz, if a wet cloth doesn't...

    I do the same a Helmholtz, if a wet cloth doesn't do it the next step is WD40.
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