Search found 2385 matches

by soulsonic
18 Feb 2021, 04:40
Forum: Amplifiers
Topic: Suhr Reactive Load [schematic]
Replies: 98
Views: 9913

Re: Suhr Reactive Load [schematic]

Be sure to use a big heatsink so you don't need a fan!
by soulsonic
26 Jan 2021, 03:05
Forum: Amplifiers
Topic: Suhr Reactive Load [schematic]
Replies: 98
Views: 9913

Re: Suhr Reactive Load [schematic]

Doesn't work that way unfortunately. The input to the active component of the attenuator isn't line level. It's connected to the output of the amp through a pot. With that pot almost all the way up you're asking whatever EQ you install to handle the full voltage of the speaker output. I'm sure you ...
by soulsonic
25 Jan 2021, 05:36
Forum: Amplifiers
Topic: Suhr Reactive Load [schematic]
Replies: 98
Views: 9913

Re: Suhr Reactive Load [schematic]

Since that attenuator is active, there's nothing stopping you from adding an active tone control circuit between the load and attenuator thing.
by soulsonic
23 Jan 2021, 18:41
Forum: Amplifiers
Topic: Suhr Reactive Load [schematic]
Replies: 98
Views: 9913

Re: Suhr Reactive Load [schematic]

Anyone know how to reduce the treble content of the suhr load? I've been studying this thread and the gear page reactive load thread. Looks like reducing the 62r resistor will do it? Yes reduce the 62 Ohm resistor to reduce the treble peak in the reactive load. Or tweak the frequencies at/after the...
by soulsonic
16 Jan 2021, 17:32
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Complete Maestro Service Manual, indexed PDF
Replies: 6
Views: 954

Re: Complete Maestro Service Manual, indexed PDF

Thanks!
Weird mistake in the FZ-1S schematic. Line drawn wrong shows output of fuzz connecting to R5 instead of R7, and R7 is connected to 9v. It seems the connections of R5 and R7 are swapped from what they should be. Is this already a known issue with the factory schematic?
by soulsonic
02 Jan 2021, 05:18
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Pro Co - Rat 2
Replies: 49
Views: 15646

Re: Pro Co - Rat 2

I am thinking of building RAT2 on top of the TONEPAD layout, I researched about variations from PROCO RAT to RAT2, would these be the modifications? thanks I think the only real difference between the Rat and Rat 2 is that the Rat 2 has an LED bypass indicator with a JFET circuit to switch it (simi...
by soulsonic
18 Dec 2020, 23:24
Forum: Amplifiers
Topic: Suhr Reactive Load [schematic]
Replies: 98
Views: 9913

Re: Suhr Reactive Load [schematic]

Looks great! I'm curious if the line out sounds any different because of the different line out transformer you used. My original Suhr seems to be a bit lacking in deep low end.
by soulsonic
13 Dec 2020, 01:01
Forum: Boutique Stompboxes dissected...
Topic: Earthquaker Devices - Arrows [traced]
Replies: 15
Views: 4716

Re: Earthquaker Devices - Arrows [traced]

I recently did on the perfboard this nice pedal, it's for a friend, who asked for a mod on frequency boost. So I put a switch on c2 to choose from 4.7n 47n and 100n, a common mod in rangemaster. But with this layout nothing happen, no sound change. Just the original (very nice indeed) sound. How ca...
by soulsonic
09 Dec 2020, 06:36
Forum: Open Source Projects
Topic: Analogguru - FET-Booster (vero layout)
Replies: 43
Views: 9415

Re: Analogguru - FET-Booster (vero layout)

Yesterday I got this booster again because I wanted to make it more flexible by adding a switch on C1 and have the possibility to choose between two values, 22nF and 5nF but i don't hear any difference in tone between 22nF and 5nF. So i put 1nF but the difference is almost perceptible. Why does thi...
by soulsonic
09 Dec 2020, 06:10
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Dunlop JDF2 Fuzz Face [schematic]
Replies: 17
Views: 5251

Re: Dunlop JDF2 Fuzz Face [schematic]

Interesting FF schemo and I only care about one thing... does it sound good? :hmmm: Mine sounded better after I changed C3 to a 1uF film cap. That's the only mod I've ever done to mine. Cleared up the muddiness a bit. BTW, those big electrolytic caps are to keep it from oscillating, though I think ...
by soulsonic
01 Dec 2020, 00:08
Forum: Pedal Debugging & Troubleshooting Support
Topic: Pnp Ge and Npn Si in same enclosure wired in parallel
Replies: 3
Views: 265

Re: Pnp Ge and Npn Si in same enclosure wired in parallel

It's absolutely no trouble to wire the PNP Fuzz Face "upside down" with Collector resistors, etc tied to ground. If you try to do it without power supply decoupling, you'll likely have oscillation issues. But if you wire a small resistor (like 100 ohm) with a large electrolytic cap (like 1...
by soulsonic
29 Nov 2020, 02:00
Forum: Amplifiers
Topic: Taming the Peavey "Nasties"
Replies: 72
Views: 27016

Re: Taming the Peavey "Nasties"

Old thread resurrection. I have a VTM 120 - which choke from MM would work in the 120? I see they sell one for the 5150, Butcher and VTM 60. These amps all have nearly the exact same power amp and power supply. A choke intended for a Butcher would probably be a perfect fit. They probably spec the s...
by soulsonic
25 Nov 2020, 01:39
Forum: Amplifiers
Topic: Small Push Pull tube amp build, advice sought.
Replies: 27
Views: 1649

Re: Small Push Pull tube amp build, advice sought.

I'm very pleased with the preamp and phase inverter section of my re-built 6V6 mystery amp. Check out the second schematic I posted that shows how I rebuilt it. I used Merlin's book as a guide and I recommend it. You can then design the power supply and power amp to work with the voltages you have a...
by soulsonic
21 Nov 2020, 00:34
Forum: Parts & Tools Sourcing & Trading
Topic: Reticon SAD1024 BBD
Replies: 2
Views: 403

Re: Reticon SAD1024 BBD

Good luck
by soulsonic
17 Nov 2020, 00:23
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH - Big Muff Pi ( Ram Head, Early Version )
Replies: 151
Views: 67040

Re: EH - Big Muff Pi ( Ram Head, Early Version )

Well, I cleaned it, and it seems fine now.
Replaced all three 10uF electrolytics and it works great now. Sounds very good.
by soulsonic
15 Nov 2020, 20:30
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH - Big Muff Pi ( Ram Head, Early Version )
Replies: 151
Views: 67040

Re: EH - Big Muff Pi ( Ram Head, Early Version )

Hey, is it normal for these to have annoying scratchy tone controls because of the DC path thru them? The tone control on mine scratches really bad, but I'm reading about 4vDC across it and I can see in the schematic that there is an obvious DC path to ground coming from the collector of Q2 and goin...
by soulsonic
15 Nov 2020, 18:18
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH - Big Muff Pi ( Ram Head, Early Version )
Replies: 151
Views: 67040

Re: EH - Big Muff Pi ( Ram Head, Early Version )

A friend of mine just gave me his to repair, and it is this version exactly, even same brand of caps. I wonder where this one fits in the timeline? I haven't seen these values listed in the usual version schematics (though maybe I just missed it somewhere). Kitrae thinks the pots in these are usual...
by soulsonic
14 Nov 2020, 18:31
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: EH - Big Muff Pi ( Ram Head, Early Version )
Replies: 151
Views: 67040

Re: EH - Big Muff Pi ( Ram Head, Early Version )

here's mine: http://www.naturalbornyoers.com/forumpics/bigmuff.JPG DSC01715.jpg DSC01714.jpg DSC01713.jpg DSC01712.jpg DSC01711.jpg A friend of mine just gave me his to repair, and it is this version exactly, even same brand of caps. I wonder where this one fits in the timeline? I haven't seen thes...
by soulsonic
28 Oct 2020, 05:24
Forum: Boutique Stompboxes dissected...
Topic: Frantone - Brooklyn Overdrive [traced]
Replies: 6
Views: 1901

Re: Frantone - Brooklyn Overdrive [traced]

Hi guys, From the layout on the video, you can clearly see that only C8, C9 and C10 are polarized capacitors. Also C5 is 220nF. Cheers! If you mean the 3 I highlighted here: Brooklyn_Overdrive_HiLight.jpg Then, no, those are not polarized. They're Nichicon Muse bipolar caps. I used them alot, they'...