Search found 801 matches
- 04 Sep 2019, 01:36
- Forum: Modern Stompbox Effects (1975 - ...)
- Topic: Dean Markley - Overlord 1 Tube Drive - power transformer [schematic]
- Replies: 25
- Views: 6885
Re: Dean Markley - Overlord 1 Tube Drive - power transformer [schematic]
(José, maestrazo! Brava la cosa por ahí, no? Animo que han salido de peores!! :hug:) In fact, this particular unit has a 12AU7 but sadly, I don´t have a 12AX7 to make a personal test. Any way, the owner said that a pleasant change happened, kinda "clean the thing out", but... and correct m...
- 29 Aug 2019, 23:15
- Forum: Modern Stompbox Effects (1975 - ...)
- Topic: Dean Markley - Overlord 1 Tube Drive - power transformer [schematic]
- Replies: 25
- Views: 6885
Re: Dean Markley Overlord (tube) power transformer [schematic]
Corrected schemo
- 29 Aug 2019, 23:11
- Forum: Modern Stompbox Effects (1975 - ...)
- Topic: Dean Markley - Overlord 1 Tube Drive - power transformer [schematic]
- Replies: 25
- Views: 6885
Re: Dean Markley Overlord (tube) power transformer [schematic]
Today repairing another unit, spotted another minor error in that schemo: R14 = 24k, not 47k... sorry
- 09 Aug 2019, 04:26
- Forum: Boutique Stompboxes dissected...
- Topic: Fulltone - Supa-Trem [traced]
- Replies: 72
- Views: 33982
Re: Fulltone - Supa-Trem [traced]
So, this unit arrive today and I have some spare time to go deeper.
Any way, if somebody spots something funky, lemme kno'
Any way, if somebody spots something funky, lemme kno'
- 23 Jul 2019, 09:20
- Forum: Modern Stompbox Effects (1975 - ...)
- Topic: Dean Markley - Overlord 1 Tube Drive - power transformer [schematic]
- Replies: 25
- Views: 6885
Re: Dean Markley Overlord (tube) power transformer [schematic]
I spotted a little mistake today: that point -V2 in between R23 and the (-) pin of C18 IT'S WRONG. Must be -V1.
- 11 Jul 2019, 23:19
- Forum: Modern Stompbox Effects (1975 - ...)
- Topic: Dean Markley - Overlord 1 Tube Drive - power transformer [schematic]
- Replies: 25
- Views: 6885
Re: Dean Markley Overlord (tube) power transformer [schematic]
Well, an old unit is in the bench right now, so I traced (the switch just give up) Is fully checked, but some values doesn't match with that old drawing we all know :shock: :D Take a look and if in doubt, I can make some clarifying pics. Rgds Pato Corrected schematic: https://www.freestompboxes.org/...
- 19 May 2019, 04:06
- Forum: Boutique Stompboxes dissected...
- Topic: Keeley Katana 2014 [traced]
- Replies: 3
- Views: 2575
Re: Keeley Katana 2014 [traced]
Thanks, manLemontheo wrote:Hi,
Nice schematic.
Have you got the drain voltages?
Thanks.
Théophile
Sorry, it's gone, but I can borrow it and do the measures. Just give me some time, ok?
- 16 May 2019, 08:19
- Forum: Boutique Stompboxes dissected...
- Topic: Keeley Katana 2014 [traced]
- Replies: 3
- Views: 2575
Re: Keeley Katana 2014 [traced]
Well, a found a minor mistake: pot taper is wrong; it must be A250K, not B250K
Not the end of the world, but now is correct
Sorry
Not the end of the world, but now is correct
Sorry
- 16 May 2019, 07:45
- Forum: Boutique Stompboxes dissected...
- Topic: Keeley Katana 2014 [traced]
- Replies: 3
- Views: 2575
Keeley Katana 2014 [traced]
This unit (#K8832) from 2014, is a little different from the rest I can found in the web.
In fact, some values are just weird... so, I decided to trace it.
If there's any doubt, I can still provide pics for few days; after that, the unit goes back to the owner.
In fact, some values are just weird... so, I decided to trace it.
If there's any doubt, I can still provide pics for few days; after that, the unit goes back to the owner.
- 29 Mar 2018, 06:15
- Forum: Boutique Stompboxes dissected...
- Topic: JHS - Angry Charlie V3 (3 band eq) [traced]
- Replies: 49
- Views: 32101
Re: JHS - Angry Charlie V3 (3 band eq) [traced]
Looks like this is the origin of that elusive tone section
- 29 Mar 2018, 06:10
- Forum: Boutique Stompboxes dissected...
- Topic: JHS - Angry Charlie V3 (3 band eq) [traced]
- Replies: 49
- Views: 32101
Re: JHS - Angry Charlie V3 (3 band eq) [traced]
@marshmellow As long as C10 is in the Vref net, there's no big difference. Check the pics in page 1 of this thread.bugg wrote:I won't argue that it should be, but I'm fairly certain that it wasn't.marshmellow wrote:C10 should be at the junction of R8/R9, not at the opamp output.
- 17 Mar 2017, 09:14
- Forum: Boutique Stompboxes dissected...
- Topic: JHS - Angry Charlie V3 (3 band eq) [traced]
- Replies: 49
- Views: 32101
Re: JHS @ngry Ch@rlie V3(3 band eq) guts [traced]
Those two suckers must be added @ input:
R1: 1M to ground
C1: 22n in series with the 1k resistor R2 (same value as the MI audio Crunch Box, I guess... but you can try something else)
R1: 1M to ground
C1: 22n in series with the 1k resistor R2 (same value as the MI audio Crunch Box, I guess... but you can try something else)
- 05 Jan 2017, 14:48
- Forum: Boutique Stompboxes dissected...
- Topic: JHS - Angry Charlie V3 (3 band eq) [traced]
- Replies: 49
- Views: 32101
Re: JHS @ngry Ch@rlie V3(3 band eq) guts [traced]
How soon is soon?
Now, we need to figure out some values - 05 Jan 2017, 14:27
- Forum: Boutique Stompboxes dissected...
- Topic: JHS - Angry Charlie V3 (3 band eq) [traced]
- Replies: 49
- Views: 32101
Re: JHS @ngry Ch@rlie V3(3 band eq) guts [traced]
Tinking with fresh head, there's nothing uber wrong with the tone control, just need to be rearranged in the schemo to clarify... soon. Thanks POTL
- 04 Jan 2017, 12:25
- Forum: Boutique Stompboxes dissected...
- Topic: JHS - Angry Charlie V3 (3 band eq) [traced]
- Replies: 49
- Views: 32101
Re: JHS @ngry Ch@rlie V3(3 band eq) guts [traced]
The LM833 section is a MI Audio Crunch Box
- 04 Jan 2017, 11:39
- Forum: Boutique Stompboxes dissected...
- Topic: JHS - Angry Charlie V3 (3 band eq) [traced]
- Replies: 49
- Views: 32101
Re: JHS @ngry Ch@rlie V3(3 band eq) guts [traced]
bro what program you drew this diagram ExpressPCB, bro :wink: I try to draw Charlie Brown traced scheme to test and try to help you Thanks, but that is a useless effort. CB has nothing to do here. :thumbsup With all respect, the hard work is done so if you want to help, put your eyes on those pictu...
- 04 Jan 2017, 02:25
- Forum: Boutique Stompboxes dissected...
- Topic: JHS - Angry Charlie V3 (3 band eq) [traced]
- Replies: 49
- Views: 32101
Re: JHS @ngry Ch@rlie V3(3 band eq) guts [traced]
I know... that's way I posted It... follow the traces and look if you can find any clue
- 03 Jan 2017, 22:27
- Forum: Boutique Stompboxes dissected...
- Topic: JHS - Angry Charlie V3 (3 band eq) [traced]
- Replies: 49
- Views: 32101
Re: JHS @ngry Ch@rlie V3(3 band eq) guts [traced]
I've been working a little
NOT VERIFIED YET... that Treble control ... help?
NOT VERIFIED YET... that Treble control ... help?
- 01 Nov 2015, 01:36
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: Stuck on a Muff... [SOLVED]
- Replies: 6
- Views: 1186
Re: Stuck on a Muff... [SOLVED]
Some reference voltages here at the end: http://www.electrosmash.com/big-muff-pi-analysis As always, recheck for missing or faulty solder joints and pinouts if you're using 5089's from different vendors. As Intripped said, the best way is to run a signal and check stage by stage... everything can be...
- 30 Jul 2015, 11:29
- Forum: Boutique Stompboxes dissected...
- Topic: AMT - Legend Amp Series 2 [traced]
- Replies: 143
- Views: 150146
Re: AMT - Legend Amp Series 2 [traced]
Maybe rotating the BF5458 will simplify the tracing, just to get the drain not so surrounded