Search found 14 matches

by Pyramid Head
Wed Sep 26, 2018 1:06 am
Forum: Rack Pieces
Topic: Triaxis Lead 1 Red and Output Knob Problems?
Replies: 7
Views: 2864

Re: Triaxis Lead 1 Red and Output Knob Problems?

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 is....
by Pyramid Head
Wed May 23, 2018 3:34 pm
Forum: Rack Pieces
Topic: 50/50 Power Amp Tube Layout Questions...
Replies: 8
Views: 4203

Re: 50/50 Power Amp Tube Layout Questions...

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 left, V2...
by Pyramid Head
Wed May 23, 2018 12:18 pm
Forum: Rack Pieces
Topic: 50/50 Power Amp Tube Layout Questions...
Replies: 8
Views: 4203

Re: 50/50 Power Amp Tube Layout Questions...

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 light. ...
by Pyramid Head
Wed May 09, 2018 4:21 am
Forum: Rack Pieces
Topic: 50/50 - Anyone tried 5751's?
Replies: 1
Views: 1564

50/50 - Anyone tried 5751's?

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 compleme...
by Pyramid Head
Wed May 09, 2018 3:51 am
Forum: Modern Era Amps (1991-Present)
Topic: Subway Blues - What tubes do you use?
Replies: 1
Views: 1161

Subway Blues - What tubes do you use?

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) ***EDIT...
by Pyramid Head
Thu Apr 26, 2018 12:55 am
Forum: Tubes
Topic: Subway Blues retube - need advice!!
Replies: 0
Views: 2509

Subway Blues retube - need advice!!

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) ***EDIT...
by Pyramid Head
Sat Apr 21, 2018 6:30 am
Forum: Modern Era Amps (1991-Present)
Topic: Subway Blues - Any Cathode Follower Tubes?
Replies: 10
Views: 4647

Re: Subway Blues - Any Cathode Follower Tubes?

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 purists m...
by Pyramid Head
Thu Apr 19, 2018 4:20 pm
Forum: Rack Pieces
Topic: TriAxis: Any Cathode Follower Tube (Position)??
Replies: 4
Views: 2210

Re: TriAxis: Any Cathode Follower Tube (Position)??

Thank you for your time IronSean!
by Pyramid Head
Thu Apr 19, 2018 12:34 pm
Forum: Rack Pieces
Topic: TriAxis: Any Cathode Follower Tube (Position)??
Replies: 4
Views: 2210

Re: TriAxis: Any Cathode Follower Tube (Position)??

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?
by Pyramid Head
Wed Apr 18, 2018 1:03 pm
Forum: Modern Era Amps (1991-Present)
Topic: Subway Blues - Any Cathode Follower Tubes?
Replies: 10
Views: 4647

Re: Subway Blues - Any Cathode Follower Tubes?

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 wanted con...
by Pyramid Head
Tue Apr 17, 2018 9:27 pm
Forum: Modern Era Amps (1991-Present)
Topic: Subway Blues - Any Cathode Follower Tubes?
Replies: 10
Views: 4647

Re: Subway Blues - Any Cathode Follower Tubes?

Thanks. About the Sovtek 12AX7LPS, I've read from multiple sources that they're not suitable for this application, due to its Spiral Filament construction, like the Tung-Sol RI, Electro-Harmonix, Mullard RI. Although the JJ ECC83S, while being a spiral filament tube, is supposed to work fine. The ge...
by Pyramid Head
Fri Apr 13, 2018 2:45 am
Forum: Rack Pieces
Topic: TriAxis: Any Cathode Follower Tube (Position)??
Replies: 4
Views: 2210

TriAxis: Any Cathode Follower Tube (Position)??

Hi y'all! As I understand it, any tube used after tone controls or after an FX-Loop usually occupies a cathode follower function. Correct me if I'm wrong! I noticed that both V3 & V5 in the TriAxis might fit the profile. And since I'm retubing my TriAxis, and that you can't use any tube in the catho...
by Pyramid Head
Wed Apr 11, 2018 7:50 pm
Forum: Tubes
Topic: Comprehensive Mesa Boogie Cathode Follower list?
Replies: 7
Views: 6632

Re: Comprehensive Mesa Boogie Cathode Follower list?

Anyone knows about the Subway Blues?
Any cathode follower tubes?
by Pyramid Head
Tue Apr 10, 2018 7:29 pm
Forum: Modern Era Amps (1991-Present)
Topic: Subway Blues - Any Cathode Follower Tubes?
Replies: 10
Views: 4647

Subway Blues - Any Cathode Follower Tubes?

Hi everyone, I've had some issues with my Subway Blues, mostly with the reverb (found out the Reverb Driver Tube (V4) was dead so that explains it), and the expected volume swells, hiss, crackling and popping sounds caused by worn-out preamp tubes. Power tubes need changing so I'm going for a full r...