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  1. H

    New amp day - Mesa Mark III - no stripe - #25

    Sure. I'm basing this on my C+. I have zero experience with any other MK. While on stand by for app 3 hrs one eve , I opened studio door and its filled with smoke. Sent it to Mike. He rebuilt The affected area. He told me that those resistors get pretty hot. This was mid 90's. Since then , I...
  2. H

    New amp day - Mesa Mark III - no stripe - #25

    The 680 ohm LDR supply resistor?
  3. H

    Looking for Mark IV Lead Gain Pull Fat pots.

    That sux! It really shud be an relatively easy fix. Can't ya rebuild the pot? Where can I find info on this sale? Combo? Head? 😞
  4. H

    Mesa Mark IV B changes

    I have a C+ and I'm very familiar with the circuitry. The MKIV lead stage is nearly identical except for two or three component values. The 500pf cap in parallel with the 270k R, the pull bright resistor is a 22k. And , did you put that 120pf cap in? It was removed in later C+'s . Are these the...
  5. H

    Mark IIC+ - Guide for Dummies

    My DRG C+ has Randall's Sig on it. By the AC cord, there's just a capital r and s in cursive very fine and faint.
  6. H

    MK 2C+ Class A question

    Back when Randall, Mike and Doug were tweaking the idea of a C+, what % of plate dissipation were they shooting for with the 105 PT? I read in different threads here that Mesa biases amps on the cool side as opposed to the " nominal " 70%.
  7. H

    Mark IIC/C+ and III Power Section 1.5K Resistor Placement

    My 2:90 power amp uses both. One in Ch. A and the other in Ch. B .
  8. H

    Mark II ID’ing

    Hey Joey, are you the Joey from Slocone forums?
  9. H

    Mark II ID’ing

    That sounds consistent with my experience with my C+ . They blew the dust off mine and shipped her out.
  10. H

    Mark II ID’ing

    That saddens me over your father in laws friend. May he/ she R I P. Mike is super cool to talk to. Dang, I wish that I had a fraction of his knowledge, as well as others here in this forum. But I'm scratching my head over this. I'm kinda leaning with WoodButcher. It looks like, to me, that...
  11. H

    Mark II ID’ing

    Are you the original owner?
  12. H

    Mark II ID’ing

    There does seem to be some residual solder on upper left on preamp board. Is that normal to have the pilot light there? If not, that may have been where the eq switch was. I dunno.
  13. H

    Mark II ID’ing

    I've been in my 1984 DRG C+ RP11A # 12732 sooo many times, somethings just don't look right on the preamp board. I understand there's no EQ. But other places. You called and they said its a C+?
  14. H

    Mark III HRG Blue Stripe -> DRG No Stripe Conversion

    Positive progress is what I love. Congrats! Dang, if I had your knowledge and testing gear my amp would be just the way I want it. But there'd be 25 mini switches everywhere! I know Ampo is tweakable to ones ideals but I just don't know where to start.
  15. H

    MK 2C+ Class A question

    Ty for the advice with the upmost respect from you two. This is the first time, I think, that I ever heard about upgrading the the 30uf. Besides the obvious failing sign, bulging, what are the other symptoms as to which you describe? Thanks? Jim
  16. H

    MK 2C+ Class A question

    I often wonder why its recommended to put 600v coupling caps when the voltage is lucky to even reach 400. This is not a debate statement, more of opinions rather. I have 600's ready to put in but have been procrastinating. Also, what's your take on putting the outer foil lead to the lower...
  17. H

    MK 2C+ Class A question

    I have a factory DRG C+ and my measurements are identical to yours , with power tubes IN .And component wise. My plate voltage hover around 500vdc. 105 PT. Wall voltage around 120 - 122 VAC.
  18. H

    Reverb Tank Repair Parts

    www.amprepairparts.com . Give them a shot. Its a long shot but worth a try. Good luck.
  19. H

    2B is not 2B. (It's a 2C+)

    Thanx for the picts from you both. Yep, looks like mine too. Thanks for taking the time!
  20. H

    2B is not 2B. (It's a 2C+)

    Thanx for the replies !. I'm iffy about that Rep. I kinda see where it could be Rcs in cursive. But not conclusive. I'm gonna try to find some picts. Can you point me to any?Anyway, there's no way I'm sending back. That would be the THIRD time. First time was a waste of time and money. Someone...
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