Search found 394 matches

by Markusv
Wed Jan 12, 2022 4:10 pm
Forum: Technical Discussion
Topic: Moving the PI to earlier in the circuit
Replies: 8
Views: 812

Re: Moving the PI to earlier in the circuit

@SoulFetish
Whoa!!
That is different.
And on another note- did u see where the standby switch is located?

Thanks so much!
by Markusv
Tue Jan 04, 2022 8:17 pm
Forum: Technical Discussion
Topic: Moving the PI to earlier in the circuit
Replies: 8
Views: 812

Re: Moving the PI to earlier in the circuit

PDF64
Amazing answer. Thanks- lotsa things I did not consider

Suckseeder-
Thank you I will look for the schematic

You folks rock!

Markus
by Markusv
Thu Dec 30, 2021 1:17 am
Forum: Technical Discussion
Topic: Moving the PI to earlier in the circuit
Replies: 8
Views: 812

Re: Moving the PI to earlier in the circuit

Thanks Phil Yes- I do get the rotation of the Power tubes and the point of the PI. That I am very familiar with. But I was thinking if a single preamp stages preceded the PI. And if that preamp stage had modest gain- ( or if the PI was Cathodyne for less gain) Surely there would be space for hitting...
by Markusv
Thu Dec 30, 2021 12:54 am
Forum: Technical Discussion
Topic: Moving the PI to earlier in the circuit
Replies: 8
Views: 812

Moving the PI to earlier in the circuit

Hello all. Last night after 3 whiskeys and a bunch of Uncle Doug videos I came up with this question. Please indulge me- I have not built anything serious for about 6 years and am getting back into the game. So I am rusty as hell: What would happen if you moved the PI to directly after the 1st gain ...
by Markusv
Thu Apr 29, 2021 1:42 am
Forum: Technical Discussion
Topic: Traynor YGM 3 Tremolo trouble
Replies: 5
Views: 412

Re: Traynor YGM 3 Tremolo trouble

Thanks -- so the 3 caps in successive CR configuration?

Thx Martin
by Markusv
Thu Apr 29, 2021 1:10 am
Forum: Technical Discussion
Topic: Traynor YGM 3 Tremolo trouble
Replies: 5
Views: 412

Re: Traynor YGM 3 Tremolo trouble

Thank you Xtian. Will check tomorrow. I suspect that would be a tremolo tube cathode cap?
by Markusv
Thu Apr 29, 2021 12:11 am
Forum: Technical Discussion
Topic: Traynor YGM 3 Tremolo trouble
Replies: 5
Views: 412

Traynor YGM 3 Tremolo trouble

Hello everyone. It has been over a year since I have been active here. I have gotten rusty with amps and hardly get to tinker around much any more, so I am hoping to get some short cut advice. My YGM3 Tremolo doesn't work. Actually I bought it not working. The tubes are good so that can't be it. The...
by Markusv
Fri Jun 05, 2020 12:49 am
Forum: Vox/Hiwatt Discussion
Topic: 1964 AC30 VOLUME ISSUE
Replies: 8
Views: 1530

Re: 1964 AC30 VOLUME ISSUE

Hi Aaron

Sound wise- What are your thoughts??
Loud yes- but to my ears pretty musical sounding OT?

Markus
by Markusv
Sat May 30, 2020 3:17 am
Forum: Vox/Hiwatt Discussion
Topic: 1964 AC30 VOLUME ISSUE
Replies: 8
Views: 1530

Re: 1964 AC30 VOLUME ISSUE

I bought a Hammond for my AC 30 build and cannot be happier!!

Markus
by Markusv
Sun Aug 11, 2019 8:21 pm
Forum: Garage Talk
Topic: Aspen Pittman
Replies: 11
Views: 2173

Re: Aspen Pittman

What a sad loss

His Guitar amp book launched me into a life consumed with guitar amps. Building, tweaking, buying selling and servicing.
Rest in peace and thank you

Markus
by Markusv
Wed Oct 24, 2018 3:36 pm
Forum: Trainwreck Discussion
Topic: Two tips for taming 'shrillness' in Express clones
Replies: 35
Views: 6668

Re: Two tips for taming 'shrillness' in Express clones

Thanks Mark Appreciate your response. YEs- I may be wrong about the 150K resistor- I did not open the amp and may have simply remembered the value from Express Schems. Certainly when I built the amp I did not deviate too much from the original design except adding a PPIMV later. OK- so based on your...
by Markusv
Fri Oct 19, 2018 2:50 pm
Forum: Trainwreck Discussion
Topic: Two tips for taming 'shrillness' in Express clones
Replies: 35
Views: 6668

Re: Two tips for taming 'shrillness' in Express clones

.....And no I do not have the Hi- shunt mod. That sounds interesting
What was the Multi turn pot value? I guess a regular pot would do if insulated from chassis?

Thanks as always
Markus
by Markusv
Fri Oct 19, 2018 2:48 pm
Forum: Trainwreck Discussion
Topic: Two tips for taming 'shrillness' in Express clones
Replies: 35
Views: 6668

Re: Two tips for taming 'shrillness' in Express clones

Hi Mark

Standard as per the Liverpool Schem. I need to open the amp but pretty sure it is a .002 cap (.001 x 2 in parralel) and a 150K resistor.

Seems you think if I thicken up the sound there and drop some signal- I may not need the other changes?
by Markusv
Wed Oct 17, 2018 3:21 pm
Forum: Trainwreck Discussion
Topic: Two tips for taming 'shrillness' in Express clones
Replies: 35
Views: 6668

Re: Two tips for taming 'shrillness' in Express clones

Hi Mark (Abbott) Well I was thinking a bit of presence to keep the signal cleaner especially at higher gain but then the treble cut to shave off the excess on top especially with single coils. So I wonder what the values may be for a "set presence" I can/should probably play around with low resistor...
by Markusv
Tue Oct 16, 2018 5:49 pm
Forum: Trainwreck Discussion
Topic: Two tips for taming 'shrillness' in Express clones
Replies: 35
Views: 6668

Re: Two tips for taming 'shrillness' in Express clones

While not traditional Trainwreck, I like to get rid of the presence and replace it with a treble cut pot. Sold a few of thoses to weekend bandits getting lots of play time. No more treble problems or presence circuit problems. Mark Mark Quick question please- Do you still apply set feedback (presen...