Recent content by pavel

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    Tweed covering with hide glue?

    Perfect, thank you Jason, this is super helpful. I like Behlen's as well, for one it comes in a nice can rather than a plastic bag. But, I believe BT&C is the original supplier that most other suppliers resell anyhow, so no worries. It's reassuring to hear that you can deal with the normal...
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    Tweed covering with hide glue?

    I am getting ready my first tweed covering job on my Champ cabinet and I'd like try to use hide glue like back in the day for some extra mojo (or more likely a big mess :-) ). I use hide glue a bunch for guitar builds but this will be a first for me for this kind of application. Question for...
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    First amp build - Rob Robinette's Micro Champ

    That's pretty impressive for a hand built Chassis.
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    EF80 Micro ???

    Sorry, don't have advice on cab building specific to an EF80 micro -- I am close to start on a micro JCM800 EF80 and was going to stay small, perhaps try an 8" Celestion. I do want to add a AC voltage switch to my build though, because even though I am US based, you know, one of these days I'll...
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    Question about 5F1 baffle grille cloth stapling

    Thanks for the insight guys, very much appreciated! So it sounds like the standoff was standard even on the thicker baffles on the larger cabinets huh? (Because presumably the grille would otherwise rattle regardless of the baffle thickness?).
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    Question about 5F1 baffle grille cloth stapling

    I am curious about the optimal and/or vintage correct way of stapling grille cloth onto a 5F1 Champ baffle. Using the ¼" (or more like 5mm) baltic ply, I see a lot of builders add a ~1" extra strip around the baffle edge to raise the grille above the baffle surface. This seems to also add to...
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    How Would You Fix This?

    You have some off-cuts of the top right? I agree with everyone here that it will be a tall order to make a hard to notice repair, but if it was me, I would take it as a challenge and try on the off cuts to see how close I can get, before going for the toggle switch or any of the other fine...
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    Rob's JCM800 Micro EF80, B+2, B+3, B+4, B+5 voltages?

    I took a stab at calculating the voltages, updated schematic with the hopefully more correct values:
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    Rob's JCM800 Micro EF80, B+2, B+3, B+4, B+5 voltages?

    Ah yes, thank you Dan, I indeed missed a couple of the key dropping resistors having a modified value for the lowered PT voltage. Here is an updated schematic that matches the values in the layout drawing. The heater center tap is different in the torroidal PT setup, I fused the two layout...
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    Rob's JCM800 Micro EF80, B+2, B+3, B+4, B+5 voltages?

    Here is my schematic of Rob's design that joins the EF80 Blackvibe power stage, the JCM800 preamp and the Antek torroidal PT setup, as per his page, with a wild guess on what the B+2 through 5 could be. ... update: I removed this version of the schematic and posted one with the correct drop...
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    Rob's JCM800 Micro EF80, B+2, B+3, B+4, B+5 voltages?

    It looks like the Bassman Micro EF80 with the same LTP Phase Inverter and cathode follower has a B+2 of 295V and B+3 of 275V, respectively, so I am guessing the JCM800 follow along those lines?
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    Rob's JCM800 Micro EF80, B+2, B+3, B+4, B+5 voltages?

    Thank you Dan That's exactly what I am trying to figure out. With the B+1 at 295V I and the stock JCM 800 starting with B+2 of 469V, I fully expect I have to diverge and lower all the voltages. That is the thing -- unless I am missing it, Rob only has the EF80 Blackvibe and the stock JCM800...
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    Rob's JCM800 Micro EF80, B+2, B+3, B+4, B+5 voltages?

    Hello, I am getting ready to try building Rob's JCM800 Micro EF80. I have very little experience but am not in a hurry and want to learn and get myself up to speed as much as I can before I get my build underway. I was hoping someone could kindly fill in some details. In particular, I am...
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    EF80 Micro Deluxe

    oops, double post.




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