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    Ok... I did some more simulations. I modified one...

    Ok... I did some more simulations. I modified one of my test circuits to be very much like yours and tried like hell to adjust it to be unstable, but I just couldn't get it to act funny. Then it...
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    Yep. That's basically the same circuit, really....

    Yep. That's basically the same circuit, really. The difference is that I'm shunting positive swing over bias voltage to the bias supply so I don't need the extra inverse diode for the negative...
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    Well, as was mentioned, the typical American...

    Well, as was mentioned, the typical American brands may be more exclusive there, but maybe not. A lot of the parts are made overseas anyway and there's often an alternative brand name in other...
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    I was going to post two things, but Helmholtz...

    I was going to post two things, but Helmholtz already posted the dental mirror.

    One I wasn't going to mention, but why not? I use a nut pick to straighten and smooth out component leads after...
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    Well I'm not aware of what's available in...

    Well I'm not aware of what's available in Germany, but we do have a lot of members there so hopefully you'll get a good recommendation. I just keyed up to say that you didn't really need to post this...
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    PPIMV improvement

    I never liked the PPIMV circuits for the obvious reasons. With the amps they're intended for you basically just get PI clipping instead of power tube clipping. And no PI circuit I'm aware of is known...
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    Or,.. A shipment or two of OT's to Laney had the...

    Or,.. A shipment or two of OT's to Laney had the wire colors wrong and Laney just improvised. It happens.
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    More searching didn't reveal a direct comparison...

    More searching didn't reveal a direct comparison between the s and r models for the 10", but I did find the 12" s and r side by side in a catalog page. It's probable the the magnet on the p10s is...
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    The changes work in tandem, not individually. The...

    The changes work in tandem, not individually. The operation of the tube is altered from grid leak to cathode bias. The 1.5k cathode resistor in place of the 4.7k will increase signal sensitivity at...
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    You've found my weakness ;) I get very impatient...

    You've found my weakness ;) I get very impatient because I know I need to get in and out. I pull assuming I've got the solder melted and think there must be a kink in the lead at the other end of the...
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    I've never tried the MOD, but I've read that it's...

    I've never tried the MOD, but I've read that it's designed for a very wide and flat frequency response for modeling amps that simulate different cabinet types. And that doesn't sound great to me for...
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    We have a forum specifically for schematic...

    We have a forum specifically for schematic requests. This is the most effective way and place to request a schematic. It's called "schematic requests". You should post your schematic request there....
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    Jensen's "S" model was a step below their "R"...

    Jensen's "S" model was a step below their "R" line. I have no idea what the real world difference is between the p10s and the p10r, but the p10r is the more desirable speaker. That being the case you...
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    Please make these changes and let us know how it...

    Please make these changes and let us know how it works out :thumbsup:

    https://music-electronics-forum.com/attachment.php?attachmentid=56976&d=1581914811
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    el84's seem to behave better with larger grid...

    el84's seem to behave better with larger grid stops. Notice the value chosen by Vox! I can't speak to the technical reasons, but I think it's because of their higher gain. I chose 10k arbitrarily on...
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    As far as I know the "whacking big" 2.2M...

    As far as I know the "whacking big" 2.2M resistors (high impedance for this circuit) and the reference to a relatively high impedance -V supply via a relatively high 550k (220k grid stop series with...
  17. I'm cool with that, with one caveat. It's an...

    I'm cool with that, with one caveat. It's an impedance switch. There's a good chance under many circumstances that it could be left in one position for a very, very long time and the unused contacts...
  18. I know THAT stuff. Could work I think. My...

    I know THAT stuff. Could work I think. My consideration is that those contacts could be cleaned and then something applied that will stay put to keep them from further oxidation.

    BTW, don't get...
  19. Ok. I can buy that, but the stuff I'm speaking of...

    Ok. I can buy that, but the stuff I'm speaking of seemed to me more often exclusive to contacts, evenly distributed (never globy) and always has the same smell and color.?. Also, I know that grease...
  20. So what IS that transparent amber, tacky stuff...

    So what IS that transparent amber, tacky stuff that I find on old switches and sometimes even jacks or pots? Which, BTW, are rarely oxidized where that stuff is still present.
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    FWIW this was a popular PI for Mesa. They...

    FWIW this was a popular PI for Mesa. They actually use it in a lot of amp models designed over a span of more than a decade. So it must be working for them and their customers. In my experience it...
  22. This^^^^^^^^^^^^^^^^ A little reading on line...

    This^^^^^^^^^^^^^^^^

    A little reading on line indicates that silver plated contacts aren't ideal for low voltage applications. And this would be a low voltage application. I think, clean them and...
  23. On the subject of redundant packaging, and...

    On the subject of redundant packaging, and somewhat more related to the forums genre ;) I've asked Mouser several times to omit as much of their secondary packaging as practical. They never have....
  24. Well, getting back to the tone of the thing for a...

    Well, getting back to the tone of the thing for a moment. I think the extra saturation might be a consequence of our era. Jimmy's played through a lot of amps since then and most of them were...
  25. Not too long ago I was researching the venerable...

    Not too long ago I was researching the venerable Soldano SLO-100 and many discussions on other forums included participants that felt entirely confident to comment on the amp based on their digital...
  26. Second that. But give me 25k and I'll get on...

    Second that. But give me 25k and I'll get on board to help someone do it! Right?

    In fact,.. I bet I could get Jimmy Page himself to go to one of these guys houses and piss on the amp they have now...
  27. Yepper g1. On my last reverb amp I found that...

    Yepper g1. On my last reverb amp I found that changing one of the speaker types in a 2x12 combo squelched the resonant actuator for the feedback. I did go back to the original configuration with two...
  28. If they sell three it was worth the effort to...

    If they sell three it was worth the effort to involve Jimmy and put all the hype in place. I think the amp sounds "pretty much" like the LZ1 recordings, but not quite. There's something a little more...
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