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  1. Replies
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    One of the 7 organs I've gutted was a Kimball...

    One of the 7 organs I've gutted was a Kimball solid state organ. It set me up with shielded cable in a variety of colors. I doubt I'll ever have to buy shielded cable again. There are tons of solid...
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    I got all the parts for my Bandmaster build and I...

    I got all the parts for my Bandmaster build and I detoured on that for a few days, but I'm going to go ahead and finish the 5E3 build first. My reasoning being that I care more about the Bandmaster...
  3. You should measure them. Generally speaking you...

    You should measure them. Generally speaking you want them as close as possible.
  4. "Also nice to select your R's so that they're...

    "Also nice to select your R's so that they're closely matched."

    Leo said that above. It's an important point. This is the disadvantage of a transformer with a filament CT, because the windings...
  5. No reason not to create a humdinger...

    No reason not to create a humdinger with a 500R pot...
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    I've got the parts for the Bandmaster/Concert on...

    I've got the parts for the Bandmaster/Concert on order. They'll be in this week.

    So yesterday I had nothing to do and decided to start cleaning out the M3 chassis. Removed components from the...
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    I'm not defending them because I don't know squat...

    I'm not defending them because I don't know squat about MM other than their transformers seem to be ridiculously priced... I understand you have a bone to pick with them, and that's fine...

    But I...
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    I assumed he meant that that was one of the...

    I assumed he meant that that was one of the "battery of tests" as opposed to the setup for all the tests. I would assume they did some tests in an actual amp.
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    Yeah, I'm with Chuck. Don't wire brush or...

    Yeah, I'm with Chuck. Don't wire brush or sandblast the laminations... Sergio Hamernik at Mercury Magnetics argues that rust on the laminations actually improves performance of the transformers...
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    I'd probably go with the Edcor, then. They make...

    I'd probably go with the Edcor, then. They make quality transformers at a reasonable price. MM makes quality transformers, just not at a reasonable price...
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    I'd be concerned about the screen grid voltages...

    I'd be concerned about the screen grid voltages getting too high. I'd probably go with the ClassicTone one. It's really close to spec and CT are a good value, quality transformer.

    Also, that...
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    Doh! Of course. As I pointed out, doesn't need a...

    Doh! Of course. As I pointed out, doesn't need a lot of current, so a voltage divider ought to do the trick. Thanks, Justin! Sometimes I overthink it...

    Yes, the 6G12-A/6G7-A are the target. ...
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    I spent a few hours thinking about all this last...

    I spent a few hours thinking about all this last night and I think I've decided what I'm going to do... I'm going to build a Concert-ish kind of amp, but it's going to be a bit of a departure from...
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    I would actually prefer a 6L6 or EL34 amp, but...

    I would actually prefer a 6L6 or EL34 amp, but then I wouldn't be able to use the OT. I do have a Heyboer Trainwreck OT that I got when I was thinking I wanted to build a TW, but I'm not really that...
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    I'm just going to do the diode stacking and drop...

    I'm just going to do the diode stacking and drop 50V off the transformer. I can get 5x10V 5W diodes and run them to the HV CT and I'll be right on (actually probably a bit hot anyway because it's a...
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    According to this...

    According to this, it would be 475V off the first node without a choke (I calculated with 375VAC and then added 7V to their result. Close enough.) So yeah, I think you're right. That's too high for...
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    If I build the PS like a normal 5E3, I don't see...

    If I build the PS like a normal 5E3, I don't see why my voltage would be much more than ~35V over that of a normal 5E3, given that the unrectified voltage is only 25V higher. 5E3 schematic calls for...
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    Most of my transformers have come from organ...

    Most of my transformers have come from organ pulls and unfortunately most have been 18W (either 6V6 or EL84 PP amps). I'm done stripping those, at least for now. I'm keeping my eyes out for stuff...
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    I've got a special order Heyboer OT for a...

    I've got a special order Heyboer OT for a Trainwreck sitting on a shelf. Supposed have a good low end response. Gonna get to that one day...
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    I know, right? Edcor's shipping is insane. Not a...

    I know, right? Edcor's shipping is insane. Not a bargain for individual transformers. If you buy multiple transformer, shipping as a percentage of the order total drops quite a bit, which I guess is...
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    I don't have them yet, but I was planning on...

    I don't have them yet, but I was planning on going with ClassicTone for my Fender Concert build. They seem a good value (certainly compared to MM) and people say great things about them. Yeah, I...
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    Thanks, Justin. That was kinda my thinking, at...

    Thanks, Justin. That was kinda my thinking, at least in terms of the, "You might end up with something that kicks ass..." I was thinking, it probably won't sound exactly like a regular 5E3, but...
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    Hammond M3 to 5E3 conversion

    I was hoping to build a Fender Concert next, but my wife is telling me the budget can't take that right now, so I'm looking around at what I've got... I've got a Hammond M3 and I'm thinking of...
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    You might also try a couple strips of tolex just...

    You might also try a couple strips of tolex just to go along the corner. Do one there and one on the opposite side to make them match up. Maybe a 2" wide strip...
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    They also have a couple on couple on clearance...

    They also have a couple on couple on clearance that I noticed yesterday:
    https://www.tubesandmore.com/products/clearance-sale?filters=Type%3DPotentiometers
  26. Thread: Tube ID?

    by Pdavis68
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    You might try using a flashlight. I find that...

    You might try using a flashlight. I find that some tubes have writing on the glass that is almost completely invisible unless you have a light shine on it at the right angle. I use a little...
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    No worries. I have tons of those.

    No worries. I have tons of those.
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    I'm no math whiz, but the layout and schematic...

    I'm no math whiz, but the layout and schematic both seem to say 250K (with the layout specifying linear).
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