Search found 84 matches

by swt
20 Oct 2022, 12:38
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Danelectro - BP-1 Pride of Texas [schematic]
Replies: 4
Views: 1940

Re: Danelectro - BP-1 Pride of Texas [schematic]

I couldn't enhance the picture enough to get an idea about how the bass pot works. Any clues?
by swt
20 Jul 2020, 21:16
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor - Simble [traced]
Replies: 69
Views: 53132

Re: Mad Professor - Simble [traced]

What's the purpose of those parallel caps? C12 & c13? I'm asking because if you connect c12 to accent 1 and leave c13 as is...it works as a high presence filter. Did someone try this?
by swt
06 Apr 2020, 18:01
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor - Simble [traced]
Replies: 69
Views: 53132

Re: Mad Professor - Simble [traced]

Thanks a lot bugg
by swt
01 Apr 2020, 01:22
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor - Simble [traced]
Replies: 69
Views: 53132

Re: Mad Professor - Simble [traced]

And still retains its crown. No tracing yet...
by swt
06 Dec 2019, 12:06
Forum: Amplifiers
Topic: Any small- pedal size guitar Power amplifier layout? [schematic]
Replies: 43
Views: 3683

Re: Any small- pedal size guitar Power amplifier layout? [schematic]

Hello. Is there any printable pcb layout for this? Thanks.
by swt
18 Nov 2019, 20:04
Forum: Pedal Debugging & Troubleshooting Support
Topic: Split transformer x2 +9v outputs
Replies: 5
Views: 854

Re: Split transformer x2 +9v outputs

Ahh...ok. i was trying to get 2 independent 9volts outputs as in an isolated supply. Thought would be possible using a similar approach but using the coil tap as a common and rectifying the outer leads...in a 9+9 tranny...
by swt
18 Nov 2019, 14:45
Forum: Pedal Debugging & Troubleshooting Support
Topic: Split transformer x2 +9v outputs
Replies: 5
Views: 854

Split transformer x2 +9v outputs

Hi. I've tried to post in the power section but seems closed. Can i have 2 +volts outputs out of a split transformer using 2 bridge rectifiers and a common ground?
by swt
10 Jun 2019, 17:49
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Maestro - FZ-1 Fuzztone (1962) [schematic]
Replies: 90
Views: 84862

Re: Maestro - FZ-1 [schematic]



Link to the original demo record...
by swt
15 Jan 2019, 13:57
Forum: Pedal Debugging & Troubleshooting Support
Topic: Aion lab series l5
Replies: 5
Views: 2888

Re: Aion lab series l5

Ok...solved. the 100p that was supposed to be a multilayer...was an inductor!
by swt
14 Jan 2019, 20:14
Forum: Pedal Debugging & Troubleshooting Support
Topic: Aion lab series l5
Replies: 5
Views: 2888

Re: Aion lab series l5

There is a minimum of audio. When i pluck hard comp led works as supposed...signal gets clamped and comp level does work also as expected...clamping hard when ccw...
by swt
14 Jan 2019, 14:07
Forum: Pedal Debugging & Troubleshooting Support
Topic: Aion lab series l5
Replies: 5
Views: 2888

Re: Aion lab series l5

Thanks plush. Strange is that compressor is working ok. I have audio probe til one leg of r76. Then it drops to almost nothing . If i take the comp ics out...still the same.
by swt
14 Jan 2019, 04:05
Forum: Pedal Debugging & Troubleshooting Support
Topic: Aion lab series l5
Replies: 5
Views: 2888

Aion lab series l5

Hi. Just finished this project and i am having problems with r76. Before it, i have audio probe and tested the 4.40 ac volts as per calibration. Right after it, audio is almost lost and ac volts drops down to few millivolts. Any clues?
by swt
01 Jan 2019, 18:08
Forum: DIY Projects
Topic: BAJA REACTOR 010119 [documentation]
Replies: 47
Views: 13752

Re: BAJA REACTOR 010119 [documentation]

Happy new year! And thank you Baja for being the engine of the forum by bringing new stuff to the new year!
by swt
18 Nov 2018, 02:17
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor - Simble [traced]
Replies: 69
Views: 53132

Re: Mad Professor Simble [traced]

Wow this one wins the prize for longest time without reversing in fsb!
by swt
10 Nov 2018, 19:19
Forum: DIY Projects
Topic: Baja Presence and Resonance 091118 [documentation]
Replies: 39
Views: 16715

Re: Baja Presence and Resonance 091118 [documentation]

Wow this is definitely useful. Will try it. Thanks a lot?!
by swt
29 Aug 2018, 16:30
Forum: Amplifiers
Topic: Deluxe reverb trem q
Replies: 1
Views: 1970

Deluxe reverb trem q

Hi. Can i take the bulb and ldr out of the circuit and leave it open?
by swt
04 Oct 2017, 11:34
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor - Simble [traced]
Replies: 69
Views: 53132

Re: Mad Professor Simble [traced]

+1 on decoding this one...
by swt
21 Jun 2017, 13:00
Forum: Boutique Stompboxes dissected...
Topic: Dunlop - JHF3 Band of Gypsys Fuzz Face [traced]
Replies: 26
Views: 16198

Re: Dunlop - JHF3 Band of Gypsys Fuzz Face [traced]

do you guys know why they've chosen a 220k resistor inthe cathode follower stage?. it seems pretty high. the original had 22k in there.
i also think the last resistor is 10k. but it shouldn't be calculated as an isolated part...because it's part of a 2 pole low pass filter formed by r12,13 and c9,10.
by swt
10 Apr 2017, 12:36
Forum: Boutique Stompboxes dissected...
Topic: Catalinbread - Octapussy
Replies: 19
Views: 8799

Re: Catalinbread Octapussy

bumping an old thread to see if someone has more info...