Recent content by Pyramid Head

Hello everyone! I've got a Subway Blues that broke down a while ago. While I'm repairing it, I thought that as I'm already working in the Chassis I could seize the opportunity to make some improvements. It's a late model with Bright/Fat Switch with 1/2 Power Speaker Jack and unpotted circuits...

Hi! I would be highly interested in the schematic for the earlier version of the 50/50 you seem to have found! Could you please share? Thanks! Chris

Thanks a lot. As far as being happy with my tone, I'd say yes I can get lots of phenomenal tones out of my setup, and since in the past I was working mainly in cover bands and in 'era shows (with dancers and everything) that are all about playing all the classics and having attitude...

Hi! I've got a TriAxis with a 50/50 & Two Recto 1x12" (not the new smaller recto cabs). After 12 years with this setup, I'm leaning towards getting a 2:90 to pair with the Triaxis to get better saturated high gain sounds out of it, even if it's really good right now. I've got the possibility...

Hello everyone! I've been using a TriAxis with a 50/50 power amp & Two 1x12" Recto Cabs (the original, not the newer smaller cabs) for over 12 years, and I've always had great tone: it's really made some fellow pro guitarist friends almost cry, telling me how awesome my tone is, and how much it...

Sorry for resurrecting an old thread, but people stumbling onto this page with the same problem as the OP will finally find an explanation and a solution. Booyah(the OP) and other users mentioned having re-read the Triaxis' Manual, and still not understanding why the problem occurred. The thing...

Update: I've been told by Mesa that indeed the A-A-B-B power tubes layout is correct for ALL versions of the 50/50. Also, that the Driver tube the one closest to the input jack. (No, didn't say Jacks) So it seems obvious that the Driver is indeed V3 if we say V1 is the 12AX7 located to the...

Hi. Sorry to bump this topic (although it's fairly recent). I'm retubing my 50/50, and I was wondering if the tube layout might be different depending on the version of the power amp. On the Mesa schematics, I see they say it's Version C. Mine looks exactly like the OP's picture, with a blue...

Hello everyone! I've got a TriAxis going through a 50/50 (NOT a Stereo 2:50), with two 1x12" Recto cabs (skipping irrelevant gear). I've had great success running those tubes in the 50/50: -> 3x JJ ECC83S (Matched & Balanced) -> 2x Mesa STR 420 -> 2x SED Winged =C= 6L6GC (The 2 pairs of 6L6...

Hello. My Subway Blues is in need of a complete retube. The tone was PERFECT (well.. close) with the tubes I had in it, but I think there's room for improvement. The tubes I used were: V1- Electro-Harmonix 12AX7EH V2-V3-V4- Sovtek 12AX7WA Power tubes: 2x Mesa EL84 (Sovtek, confirmed by Mesa)...

Hello. My Subway Blues is in need of a complete retube. The tone was PERFECT (well.. close) with the tubes I had in it, but I think there's room for improvement. The tubes I used were: V1- Electro-Harmonix 12AX7EH V2-V3-V4- Sovtek 12AX7WA Power tubes: 2x Mesa EL84 (Sovtek, confirmed by Mesa)...

I found out that the Q1 Resistor is used as a cathode follower to drive the fx loop in the Subway Blues. One way to reduce both manufacturing cost and the price it was selling for. Even if this trick was used to avoid using a tube to fulfill the cathode follower's function, which many tube...

Thank you for your time IronSean!

Thanks! Just to be sure. You're talking about the Mark series. My question was about the TriAxis having or not having a cathode follower tube. When you said you looked at the schematic, were you talking about the Mark or the TriAxis?

Thanks so much! I had read somewhere that a resistor (from what I remember... might be more than just a resistor) did the job of the cathode follower in the Subway Blues' circuit, but since the source seemed sketchy, and I didn't want to risk blowing up a tube I would have just ordered, I...