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  1. L

    Retubing my MK IV

    Thanks Thom. I'm a part-time custom furniture designer and builder, so I decided to use some leftover bubinga from a furniture project. I rarely see bubinga so strongly figured, so I decided to do something special for the Boogie. She turns a lot of heads.
  2. L

    Retubing my MK IV

    Yeah, I decided to just get a variety of things to try. I was a bit surprised at the final lineup... I thought I'd find a home for at least one of the RCA's. I suppose I could try it in the V-5 slot, that's the only place I didn't try an RCA. But frankly, I'm happy where it is. Now she's a...
  3. L

    Retubing my MK IV

    So here's what I wound up with. V-1 = 1961 Amperex (Holland) ecc83 V-2 = NOS Amperex (England) ecc83 V-3 = NOS Telefunken (branded Fisher) ecc83 V-4 = NOS Mullard CV4024 (12 at7) V-5 = NOS Amperex (England) ecc83 And I now have about 10 spare ecc83/12ax7's. JJ's, some Groove Tubes (re-branded...
  4. L

    Retubing my MK IV

    Thom, here's a list of tube functions from the manual: V1A = Input stage V1B = Tone recovery stage (post tone controls) V2A = Third gain stage (Rhythm modes) and Fifth lead gain stage V2B = FX return stage V3A = First Lead High Gain Stage V3B = Reverb return V4A = Second Lead High Gain Stage...
  5. L

    Retubing my MK IV

    Thom, R-2 as in Channel R-2. Are you suggesting the RCA for the V-2 slot, or V-1? In combination with an RFT ecc83 in V-1? In any event, the RFT's available on Ebay are all in Europe, about 3-4 weeks delivery. So I'm going to see what the Amperex Ecc83 does in V-1 before I order the RFT, as...
  6. L

    Retubing my MK IV

    Cool, I'll get one and try it out. I've already got a couple of Amperex Holland ecc83's on the way, so that'll give me a couple of things to try for now. Less clean is okay by me. Harmonic overtones are desirable, as are articulate leads. Fairly saturated, but not to death metal standards...
  7. L

    Retubing my MK IV

    Hi all, I've been doing some lurking here, and have found some useful tips and info. I particularly like the idea of trying one tube at a time in the V-1 slot, trying different things, then moving on to the other slots. I'm in the mood to try some different combinations, and willing to replace...
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