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  1. Mike McLane

    Gondwana - my quest for a DIY-ish IR loader

    Work any more on this?? Going straight from Particle Accelerator -> Class D -> guitar cab leaves a muddiness at the low end. Considering exploring a fixed EQ circuit post preamp to conform the Class D to the freq curve of my Deluxe Reverb power section. It occurs to me that this might be a...
  2. Mike McLane

    Cleaver clsarification

    Building the newer Cleaver. Pls clarify the use of the circled eyelets. Are these just for calibration of the jfet's? It would be good if the build docs contained a brief description on how to bias the jfet's. Anybody got a link to a previous thread where this was spelled out?
  3. Mike McLane

    Bass Dude

    I'm not a EE, but the design looks "James-ian". That aside, a lot of stellar amps (blackface Fenders, DC30's, Dr. Z's) have no MID control. As I understand it these circuits carve out a space for the mids based on the crossover frequencies designed into the Treb & Bass filters and it obviously...
  4. Mike McLane

    Bass Dude

    Just downloaded the build docs for the Bass Dude. Curious about the tone stack design. Markedly different from the 5F6A design in the Fender schems. You like this one better?
  5. Mike McLane

    High Voltage Power Supply

    Reread. . . yeah, that's what we did. For the Emily Latella fans in the audience. . . . NEVERMIND
  6. Mike McLane

    High Voltage Power Supply

    Slept a few times since we went thru this. . .in order to make the 250v voltage easier to dial in we sub'd a 4k7 in series with the 220k for R3, but I can't recall if the captioned comment meant that I REPLACED the 5k trim with a 1k . . . I think so. Pls confirm.
  7. Mike McLane

    Sproing in FX loop

    I want to pair a Sproing with SushiboxFX's Particle Accelerator. I know it was designed to go in front of the amp and maybe there's not much difference in the sound btw pre & post preamp, BUT if a feller were to place it post preamp (non-buffered loop) does the Sproing have the headroom to...
  8. Mike McLane

    Ambassador - Matchless Hotbox project

    Came like this. I assume ur talking about the one that's NOT parallel wired? Would that effect the PSU? Forget what I just said. . . . . the EZ90R is sitting in my Particle Accelerator that's not working!?!!?!? I notice that C2C is selling extra daughter boards. I'll order a couple more and...
  9. Mike McLane

    Ambassador - Matchless Hotbox project

    WRONG!!! I thought I had a 250v reading, but it was just a momentary blip. Here's what I'm getting. The NE555's came out of the same shipment. Could there be dodgy chips??? I notice I get the same reading on both sides of R4, but it measures 10K on the nose.
  10. Mike McLane

    Ambassador - Matchless Hotbox project

    IRF740!!! Figured it had to be either the 2N3904 or IRF740. Replaced one at a time and the IRF was the culprit.
  11. Mike McLane

    Ambassador - Matchless Hotbox project

    I just built a modded Ambassador (see below) that comports to the schematic I submitted in the previous post (but no B500K trim). I am not getting any output and it appears that the problem is with B+ voltage. I have taken readings at the points shown on the right below, dbl checked all...
  12. Mike McLane

    Particle Accelerator - Alembic F-2B clone

    We’ll, I’m up to the challenge. I can do either of those!!! Seriously, thx. It’s not a tough build. It’s got to be something stupid simple. I was trying to finish it up for a friend so I could concentrate on the Ambassador-DC30 mod.
  13. Mike McLane

    Particle Accelerator - Alembic F-2B clone

    So my problem's got to be somewhere else. Dbl checked all of the component values and they appear OK. But I did find that two of the pins on the Treb Pot were left unsoldered. Could that have caused electro-constipation????
  14. Mike McLane

    Ambassador - Matchless Hotbox project

    I'm working off this as the proposed mod of the Ambassador to give me a DC30 preamp. Any comments would be appreciated. Disregard any references to the foot switch, etc. I'm strictly focused on the signal path at this point.
  15. Mike McLane

    Particle Accelerator - Alembic F-2B clone

    Just finished my latest Particle Accel. Turned it on and only got a faint audible output. After a couple of minutes. . . POP! . . . and C1 blew. Almost positive it was high voltage cap, but if not would the pedal have at least worked for the duration until it blew? Any ideas? PS - Went back...
  16. Mike McLane

    Ambassador - Matchless Hotbox project

    Are we still discussing mods, etc. here?
  17. Mike McLane

    Negative Feedback!!

    I would say that LTspice is WAY above my pay grade, but unfortunately I haven't even been hired yet!! I have very little formal electronics tutoring. I'm wondering if the NFB in the Fender blackfaces is part of where their sparkle comes from and whether THAT (or some facsimile, like local NFB)...
  18. Mike McLane

    Negative Feedback!!

    I was referring to local negative feedback which I lifted from the Robinette site. I understood it to be a preamp based way to accomplish the same thing as the conventional output stage means. Basically, to clean up the signal a bit. Am I barking up the wrong tree?
  19. Mike McLane

    Negative Feedback!!

    Hard to fit it into the 1590BB version of the mod'd Ambassador, but simple enough to experiment with a little an off-board setup. I'll gve it a try and let you know what comes out of it. Thx!!
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