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  1. If these pictures donít do it for you I can...

    If these pictures donít do it for you I can sketch the supply! Those caps are 2x250m in series
  2. 5671956720 Here is HV supply- the red wires...

    5671956720

    Here is HV supply- the red wires attached to the diodes lead to HV secondary transformer wires. The red lead from the filters lead to OT B+.
  3. The OT is supplied by 2x 250m cap cans in series,...

    The OT is supplied by 2x 250m cap cans in series, tied to 8 5408ís (is this a dual rectifier??)
    Pics:
    56684
    56685

    The red leads from the cap go to B+ of the OT, and the 5408ís as seen in the...
  4. Helmholtz, Thanks for your reply! I’ve...

    Helmholtz,

    Thanks for your reply!

    I’ve meticulously cleaned the sockets and replaced the one that arced, it had melted a bit.
    The sockets are almost new do not look like they need...
  5. Chuck, I will do all of those vibration tests...

    Chuck, I will do all of those vibration tests today. One question, could a loss of bias cause a heater to plate short though?
    Here’s a picture of the speaker jacks, are these already installed...
  6. Apologies for my lack of artistic vision: 56681...

    Apologies for my lack of artistic vision:
    56681

    This is the screen supply- note that the 6a slo blow fuse is usually Ok, itís the mains that blow.

    I only drew the first set of tubes but...
  7. Thank you all for your continued interest! ...

    Thank you all for your continued interest! Tomorrow I will sketch the screen supply, and give more detail
    About the plate circuit.

    G1:

    For now I can say itís closer to AD200 (4 tubes). But...
  8. Word! If I were to disconnect one of the parallel...

    Word! If I were to disconnect one of the parallel caps, would that drop the current to a more acceptable point? Is there any reading youíd recommend to help me understand the capís effect on a...
  9. Chuck I really appreciate your sage advice, let...

    Chuck I really appreciate your sage advice, let me try and relay that Info as best I can:

    1. Thereís no choke that I can see.
    2. The screens are fed B+ from 2x paralleled 100uf caps. Two...
  10. Mick! Thank you. My initial thought after the...

    Mick! Thank you.

    My initial thought after the designer ďwashed his handsĒ of the amp was to increase the value of the screens from 1k to 1.5k to cool it down. Right before I did, it was running...
  11. Thanks for getting back Chuck! Let me address...

    Thanks for getting back Chuck! Let me address hear one at a time:

    MOV: the amp failed at a show one f the times it went down, so while I agree theyíre a good idea to install, Iím not convinced...
  12. Hey G1, just to be sure I had him bring the cab...

    Hey G1, just to be sure I had him bring the cab in and it measured ok and was the proper impedance. He uses the cab with another head, no issues.

    No PT has failed in this amp, I believe it was...
  13. Chuck! See my response to Enzo about the...

    Chuck! See my response to Enzo about the different failures. Not the same each time, the only difference between operation was the heateró> plate arc happened with 6 tubes and 1k screens, the...
  14. Enzo, Both times (three including the failure...

    Enzo,

    Both times (three including the failure before I got it) itís blown the main fuse, but once it arced from heater to plate on the first tube fed from the filter caps, and once in a separate...
  15. Chuck, thanks for your reply! Maybe Iím...

    Chuck, thanks for your reply!

    Maybe Iím misremembering, itís possible the designer said Ad200! I know thatís not incredibly helpful...

    Customer uses two bass distortion pedals , seems like...
  16. So hereís a fun one (AD-100 clone woes)

    So, there is a customer of mine with a boo-teek ad-100 copy. It has never really worked properly.

    When he received it, blew fuses, blew tubes, it had been through 3 shops before it arrived...
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    Thanks yíall- Dave, tried it but no luck! ...

    Thanks yíall-

    Dave, tried it but no luck! None of them get warm enough to be considered ďhot to the touchĒ, they all stay about the same temp.

    Jazz,

    Good looking out! Measures the 4 ou...
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    Thanks Dude! I tried that, this board is...

    Thanks Dude!

    I tried that, this board is really tough to trace.... over and under board traces, no designation numbers... didnít make it far.

    Mick, thatís awesome advice. Iím having trouble...
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    Fender Rumble 100 low voltage supply

    Hey yíall, got something in thats a pain. I think I have it dissed out but wanted to check with the Old heads if Iím on the right track:

    Fender Rumble 100, schem attached at bottom. Low...
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    90ís Univibe, power no signal

    I have a Univibe that does not produce signal, bypass or otherwise.

    All of the LEDs light and toggle correctly. The power source is 18v.

    People have documented failing voltage regulators in...
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    Thanks! Itís hardwired Iím so hooking it up to...

    Thanks! Itís hardwired Iím so hooking it up to another amp is a process, I have caps on hand so Iíll try that first.

    I was using a guitar amp with the treble maxed to test it, and got nothing...
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    Tweeter, white noise only.

    What does it mean if a tweeter passes noise but no signal? The noise increases/decreases with the tweeter control.

    Note, I put my ear right up to the tweeter, used a cardboard paper towel roll...
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    Punk Rock Video Album

    My band just released an 8 song video album. We got God to do a twitter interview.

    https://m.youtube.com/watch?v=b-Ro7zZ7kTk
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    Iíve been learning a lot about JFETs from our...

    Iíve been learning a lot about JFETs from our misadventures in JC120 distortion circuits. Since the jfet is tied to the input shorting jack, does that stop the flow through the JFET unless it has...
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    Upon further inspection it looks like someone has...

    Upon further inspection it looks like someone has replaced the transistor attached to the 9v in... from a casual inspection it looks like the wrong type. I donít have it in front of me right now, ...
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    They said that it indeed is supposed to short, ...

    They said that it indeed is supposed to short, Iíll take a peek at the DC and input jacks.
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    Iíve already sent them a message, but my next...

    Iíve already sent them a message, but my next question if this doesnít O/L the battery is the simplest way to mod a jack. I assume itís as simple as adding a switching jack contact in between...
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    H20 visual sounds V1 battery drain?

    Hey forum, and the esteemed Mr. RG Keen if youíre listening,

    Does the Visual Sounds H20 (version 1 with the round momentary footswitches) drain the battery with nothing plugged in? I can toggle...
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