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  1. Replies
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    +1. I've gotten some black and gold grille cloth...

    +1. I've gotten some black and gold grille cloth from Mojo with a weave pattern that looks the same as that. Don't know if they have all black.
  2. If the 22k resistor in question is in the power...

    If the 22k resistor in question is in the power supply, 5ma to a couple 12AX7 tubes sounds about right. On the other hand, 5ma across a grid leak? It hurts to imagine.

    As an aside, my experience...
  3. missed that one. I especially like the part...

    missed that one.

    I especially like the part where Jimmy Page is quoted as recommending the use of pedals with this amp "Today, there is a wide variety of pedals available and I would encourage you...
  4. from the blurb: "We recommend that you red this...

    from the blurb: "We recommend that you red this manual in its entirety before you plus it in"
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    Right. R78 and R79 are the 5W 470 Ohm cement...

    Right. R78 and R79 are the 5W 470 Ohm cement resistors. Opposite side of the board from R4 and R11. See my post #14
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    this ^^^^^^ I built an amp from scratch, 2x...

    this ^^^^^^

    I built an amp from scratch, 2x 6V6, with a 100ma PT. I learned the hard way that I needed more. Go with the 370EX if you're thinking about 2x 6V6 or equiv.
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    Let's get some baseline readings and practice...

    Let's get some baseline readings and practice those meter skills at the same time ;)

    Touching the probes together should give you a 0.0 reading - or nearly so - on all but the lowest scale....
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    Are these resistors discrete components? Do they...

    Are these resistors discrete components? Do they have color-band markings? Write down the (4 or 5) color values and post. If you're reading 480..500 Ohms, I suspect that you have some other resistors...
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    I would expect 100k, but the issue I see is that...

    I would expect 100k, but the issue I see is that you've set the scale to 20k. I'd think you're seeing whatever passes for over-range on the meter, set like that.
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    Just from looking at the docs you have provided,...

    Just from looking at the docs you have provided, it seems to be OK (please note that just looking is often not enough).
    Can you describe how it sounds in each pickup selector position, with the tone...
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    Absolutely true. And in our case here, since the...

    Absolutely true. And in our case here, since the physical components come with an 'acceptable error range', then the answer to the problem above becomes:
    1/(2PiRC) =...
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    If you haven't already, I think you'd like...

    If you haven't already, I think you'd like reading Goedel, Escher, Bach It combines music, math, and fascination in deep and entertaining ways.
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    To 7 digits, 1 million divided by ( 2 Pi ) is...

    To 7 digits, 1 million divided by ( 2 Pi ) is equal to 159155, so there's nothing wrong with your shortcut at all.

    I have to ask, though, are you often caught doing this math on paper? I'm never...
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    This was done with unmagnetized pole pieces,...

    This was done with unmagnetized pole pieces, demonstrating how the AlNiCo interacts with a field produced by the coil? I can see that A5 is different than the others, but I'm not certain that if I...
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    So for an experiment with two Fender-type coils,...

    So for an experiment with two Fender-type coils, one with A2 and one with A5: If we are given that the pole pieces are the same size, have uniform construction, are positioned in the coils the same...
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    I think the OP's question is hypothetical? But...

    I think the OP's question is hypothetical?

    But yours is a fair question. I know nothing about magnets, but for settling hypothetical versus realistic can we say:
    1. Is it possible/likely to find...
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    It's the nature of mind to find patterns - often...

    It's the nature of mind to find patterns - often seeing them where there is none. I might see unicorns or spaceships when I look at the clouds. Are they there by design? I can't deny that I see them.
  18. Didn't the AC15 originally have a very high-gain...

    Didn't the AC15 originally have a very high-gain input stage with an EF86? How close to a very British AC15 could this thing be nudged?

    off topic: I purchased Hammond's replacement OT (10k...
  19. OK. So i took a brief look at the scope traces....

    OK. So i took a brief look at the scope traces. Which of those traces look most like what you see at the speaker? What's the earliest trace that look most like what you see at the speaker? Whatever...
  20. So what happens to the bias on the second stage...

    So what happens to the bias on the second stage when being driven by that high signal? I haven't looked at the schematic, just thinking blocking distortion from your description of the sound.
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    Oh, You're really missing out! EVERYBODY in the...

    Oh, You're really missing out! EVERYBODY in the U.S. drinks it, every day! ;)
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    Someone once regaled me with the story on...

    Someone once regaled me with the story on posidriv screws, something about manufacturers and suppliers angling for exclusivity with the automakers, I think. That's why there are so many types of...
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    I have a few phillips-head drivers that I ground...

    I have a few phillips-head drivers that I ground the tip off of so that they would fit 'better' in a Reed-Prince screw. Saved my butt many times.

    I have a hunch that many of the screws in the...
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    Chuck beat me to the 'size matters' point, but it...

    Chuck beat me to the 'size matters' point, but it bears repeating. It only took me 30 years to realize that a properly-sized screwdriver in a well-made (not junk) screw will fit with absolutely no...
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    Insert "ionized-hair smiley thing" here

    Insert "ionized-hair smiley thing" here
  26. Drawing and posting at least the section of the...

    Drawing and posting at least the section of the circuit where these devices were, showing them in circuit (identified with a question mark?) will help us answer those questions. Really, take a...
  27. What was the other tube's calculated dissipation?...

    What was the other tube's calculated dissipation? Also, posting the voltage across your 230R cathode resistor will help me get a better idea of what you're facing. And I'm assuming the plate voltages...
  28. If you have questions about the amp, even - or...

    If you have questions about the amp, even - or especially - with questions about the component function, start drawing out a schem for us and yourself. Input circuitry, power supply, output section,...
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