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  1. Modding a Marshall Major for Cascading Pre-amp and PPIMV

    Hello All.. So I got a couple of Marshall Majors. One had the OT replaced before I got it, so it's already non-original. To this one I want to mod it to get that Richie Blackmore tone from Made...
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    Just retested and it stills cuts out after about...

    Just retested and it stills cuts out after about 20minutes of playing (like clockwork). When it cuts out the tubes are still lit up and lights are all on. Turn amp off and on and it resets itself. ...
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    lights on. no I haven't tried the patch cord in...

    lights on. no I haven't tried the patch cord in the fx loop. I will and report back. thanks
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    Marshall DSL100H Cutting Out!!

    Hello Everyone,

    Just got a used Marshall DSL100H at a great price. Everything works as it should except for this one weird thing: after about 15 minutes of playing at stage volume the amp will...
  5. so I finally found a picture of another Custom...

    so I finally found a picture of another Custom Shop SG on line and sure enough they use ceramic caps. maybe because they were period correct. Also, is that rubber insulation tubbing or shrink tubing...
  6. Use of Ceramic Caps in Gibson Custom Shop Guitars...

    I'm having an argument with someone and they are trying to tell me that the custom shop does not use ceramic caps in their guitars. I say they do. The 61 SG RI have ceramics and even the really...
  7. For sure. Those will be replaced as well. Thx.

    For sure. Those will be replaced as well. Thx.
  8. So here are a couple of photos of the transducer....

    So here are a couple of photos of the transducer. Do u feel it possible to splice these two green wires together?? How, without harming the components? thanks
  9. Iíll give it a shot. Thanks. I was going to write...

    Iíll give it a shot. Thanks. I was going to write it off.
  10. Well.... I finally figured it was indeed the...

    Well.... I finally figured it was indeed the tank. After pulling my hair out I decided to revisit the tank thing using a new tank from my reissue super that I have here. Well, it worked. So, I...
  11. For sure. I had that in mind. Thanks for the...

    For sure. I had that in mind. Thanks for the reminder.
  12. Just checked again. With transformer in place I...

    Just checked again. With transformer in place I got:

    blue/red = 1.917 KOhm

    black/green = 1 Ohm

    So, does this look like the tranny is ok?
  13. Is this just a standard reverb driver or do I...

    Is this just a standard reverb driver or do I have to order a special part.

    assume this will work...

    https://www.amplifiedparts.com/products/transformer-fender-replacement-output-3-12-w-8-ohm
  14. don't know if I should start a new thread but...

    don't know if I should start a new thread but does anyone know how to test a reverb transformer?? Do I disconnect the leads and apply a 9vdc battery to one side and measure the other??
  15. Thanks for that. 220uF at 500v is a weird cap to...

    Thanks for that. 220uF at 500v is a weird cap to find. On mojo musical the closest I found was a 220uf at 350v. Anyone know of a place that sells the 220uf at 500v?
  16. So I opened up the cap tray and found this: I...

    So I opened up the cap tray and found this:

    I wonder if this bad cap could be part of the problem??
  17. took some voltages: Reverb transformer...

    took some voltages:

    Reverb transformer primary:
    blue = 372 DCV
    red = 396

    Reverb transformer secondary:
    black=green= 0 DCV (does this mean the transformer is dead)

    Reverb Driver Tube V3a:
  18. Thanks for that. I think your right. I...

    Thanks for that. I think your right. I completely disconnected the MV Push Pull pot and I might have messed with the reverb circuit by accident. Here is a gut shot with outlines of the points I...
  19. 1978 Fender Super Reverb UL -- WEAK REVERB HELP!

    Got a 78 Super Reverb with the UL OT and MV. Been trying to clean it up and get it running again. Completely disconnected the MV/Push-Pull since I hate those MV-Boosts on the late Fenders. My...
  20. The OT was rotated 90 degrees as well.

    The OT was rotated 90 degrees as well.
  21. Thanks everyone. I wish I had a machine shop. ...

    Thanks everyone. I wish I had a machine shop. Life would be so much easier. I could make my own brackets, chassis or whatever, etc...
  22. Thanks everyone. I took Chuck's advice and...

    Thanks everyone. I took Chuck's advice and drilled out some holes at the corners of the punch out. Used some large washers and it works. Hope to get a custom made bracket at some point to tidy it...
  23. so basically, I would have to assemble the entire...

    so basically, I would have to assemble the entire amp to working spec and then test to see if it hums? then rotate PT 180 degrees if it does?
  24. please explain..

    please explain..
  25. Thanks everyone for your excellent help. What...

    Thanks everyone for your excellent help. What would you think about just rotating the PT 90 degrees and drilling new holes. See attached pictures. May be the easiest solution at the moment. I...
  26. here are my pictures...

    here are my pictures...
  27. Thanks to everyone. I will post some pictures...

    Thanks to everyone. I will post some pictures when I get to my desktop computer. iOS forum doesnít have an option to upload images. Transformer is a tad too small, so drilling new holes in not an...
  28. Mercury Magnetic JTM45-RI-P wonít fit.... Help.

    Hello everyone, got a situation here. I ordered a chassis for a jt45 build. I was going to use my Mercury Magnetics Axiom jtm45-ri-p Power Transformer (center to center 2-1/2 x 3-1/8Ē) but itís too...
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