Search found 183 matches

by Zokk
04 Mar 2016, 09:47
Forum: Modern Stompbox Effects (1975 - ...)
Topic: ELITA Kvazichor [pictures]
Replies: 2
Views: 1733

Re: ELITA Kvazichor [pictures]

Thanks for the correction mate.
So it's not the kind of IC I thought it was:
http://www.155la3.ru/datafiles/ka528br2.pdf
by Zokk
03 Mar 2016, 22:57
Forum: Modern Stompbox Effects (1975 - ...)
Topic: ELITA Kvazichor [pictures]
Replies: 2
Views: 1733

ELITA Kvazichor [pictures]

Hello I've got one of these on my bench for a small repair. It's a very interesting stereo chorus capable of smooth and very subtle effects, but also weird pitch modulations and seasick generator. It reminds me the TC SCF because they both have a modern clean overall sound, but the Elita is more dir...
by Zokk
12 Feb 2016, 13:02
Forum: Boutique Stompboxes dissected...
Topic: Death by Audio - Soundwave Breakdown [traced]
Replies: 8
Views: 5091

Re: Original Soundwave Breakdown: WTF? [traced]

Yup that's a nice "in your face" squarewave generator :lol: In the PGS demo they've shown the two trimpots, one for the "input threshold" and the second for the "level" (I assume it's the output level). Do you have the values for these trimmers please? edit: or maybe the trimpots are on your schemat...
by Zokk
20 Nov 2015, 09:17
Forum: Parts Sourcing & Trading
Topic: Lithium Battery for TR505
Replies: 3
Views: 2843

Re: Lithium Battery for TR505

Hi before going further you should have a look at the service manual: http://www.synthfool.com/docs/Roland/TR_Series/TR505/ You can find the 3V lithium with solder pin battery in many shops, for example: https://syntaur.com/Items/4311.html There a plenty on e-bay too which are a lot cheaper. If the ...
by Zokk
01 May 2015, 18:54
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Marlboro - Quadra Sound Blender QBS [schematic]
Replies: 32
Views: 25514

Re: Marlboro QSB guts [schematic]

Nope, the tremolo is located after the reverb tank, inorder to chop the reverb tail :wink:
by Zokk
07 Apr 2015, 19:23
Forum: Modern Stompbox Effects (1975 - ...)
Topic: LEL Distortion - russian - [ GUTSHOTS ] [schematic]
Replies: 3
Views: 3265

Re: LEL Distortion - russian - [ GUTSHOTS ] [schematic]

Thanks for this very clean schematic mate, the cross references for the ICs and transistors are very useful :applause:
by Zokk
06 Apr 2015, 19:26
Forum: Modern Stompbox Effects (1975 - ...)
Topic: LEL Distortion - russian - [ GUTSHOTS ] [schematic]
Replies: 3
Views: 3265

LEL Distortion - russian - [ GUTSHOTS ] [schematic]

Hi I've got this one on the bench because the owner had used a wrong psu... he toughts that it would run on 18V because of the two 9V batteries, but they are in parallel :lol: I would swear I've seen a topic about this pedal some time ago, but I couldn't find it anymore. So sorry for the double post...
by Zokk
24 Feb 2015, 20:40
Forum: Modern Stompbox Effects (1975 - ...)
Topic: EHX - Micro Synth Filter Sweep
Replies: 2
Views: 2202

Re: Micro Synth Filter Sweep

(no edit button?)
Also there is a nice project (have fun with the pcb 8) ):
http://www.wiseguysynth.com/larry/guitar.htm
by Zokk
24 Feb 2015, 20:33
Forum: Modern Stompbox Effects (1975 - ...)
Topic: EHX - Micro Synth Filter Sweep
Replies: 2
Views: 2202

Re: Micro Synth Filter Sweep

Hi honestly the EHX microsynth enveloppe is pretty basic, simple AR + Delay... I'd suggest to build a better enveloppe follower + a good ADSR enveloppe; then as filter I find the Steiner VCF much more musical and crazy than any OTA-based VCF but there are tons of VCFs which are very good too. Fast a...
by Zokk
04 Nov 2014, 21:43
Forum: Modern Stompbox Effects (1975 - ...)
Topic: MXR M-167 Stereo Chorus - Command Series [Gutshots]
Replies: 11
Views: 4910

Re: MXR M-167 Stereo Chorus - Command Series [Gutshots]

Thanks for the confirmation. However it doesn't allow for a fine setup: it has a very limited range, so I can only see distortion at some point in the negative peaks of the signal. I've ended to let this trimmer in the same postion as it was when I opened the pedal... there's no real adjustement, ju...
by Zokk
04 Nov 2014, 00:14
Forum: Modern Stompbox Effects (1975 - ...)
Topic: MXR M-167 Stereo Chorus - Command Series [Gutshots]
Replies: 11
Views: 4910

Re: MXR M-167 Stereo Chorus - Command Series [Gutshots]

Yes the micro chorus schematic is very close to this one. Thanks for the tips about the switch. I've found the real problem using the scope, it came from the pedal assembly choice: there is way too much mechanical stress on the jacks and pots. So the already fixed tracks, as you can see on my pictur...
by Zokk
02 Nov 2014, 02:21
Forum: Modern Stompbox Effects (1975 - ...)
Topic: MXR M-167 Stereo Chorus - Command Series [Gutshots]
Replies: 11
Views: 4910

Re: MXR M-167 Stereo Chorus - Command Series [Gutshots]

Thanks for advice.
I've just came across your post about the other Reticon chips, very interesting if they can be cross refs.
by Zokk
01 Nov 2014, 21:05
Forum: Modern Stompbox Effects (1975 - ...)
Topic: MXR M-167 Stereo Chorus - Command Series [Gutshots]
Replies: 11
Views: 4910

Re: MXR M-167 Stereo Chorus - Command Series [Gutshots]

Yes this one is defective, I've to make further tests to see if the SAD is still ok, because there's no chorus when the FX is on.
But I'd feel more comfortable if I had a schematic (with the transistors references as well) to guide my steps.
by Zokk
01 Nov 2014, 20:32
Forum: Modern Stompbox Effects (1975 - ...)
Topic: MXR M-167 Stereo Chorus - Command Series [Gutshots]
Replies: 11
Views: 4910

MXR M-167 Stereo Chorus - Command Series [Gutshots]

Hi as requested by fellow Govmnt Lacky, let's go with some pictures of the one I have to repair; it has the Reticon SAD512D onboard, and it's not in perfect shape. All the transistors/FETs are sanded :evil: Diodes are 1N914, trimmer is 250KOhm. IMGA0905.JPG IMGA0907.JPG IMGA0909.JPG IMGA0914.JPG IMG...
by Zokk
17 Oct 2014, 22:32
Forum: Modern Stompbox Effects (1975 - ...)
Topic: T Rex Room-Mate [gutshots]
Replies: 10
Views: 7031

Re: T Rex Room-Mate [gutshots]

Hi iefes sorry the board on the one I had to repair was too damaged for me to manage to fix the problem. I admit this kind of digital FX with complicated multi-layer pcb is way beyond my poor skills in electronics. Concerning the one you have to repair: first I'd suggest to check the regulator and t...
by Zokk
08 Jul 2014, 19:28
Forum: Amplifiers
Topic: Fender Showman BF 85w loudspeaker question
Replies: 3
Views: 1819

Re: Fender Showman BF 85w loudspeaker question

8) Thanks Pete, I know speakers are a very difficult subject. But your suggestion makes sense!!! I didn't think about the Hiwatt Fane loaded cabs before you mentioned it, and I think you're right about the sound my friend is looking for, it could compare to David Gilmour sound somehow but with more ...
by Zokk
07 Jul 2014, 21:59
Forum: Amplifiers
Topic: Fender Showman BF 85w loudspeaker question
Replies: 3
Views: 1819

Fender Showman BF 85w loudspeaker question

Hi my mate is looking for a set of loudspeakers (two 12" 16ohm in parallel) to replace his dual homemade Beyma cab. I've seen many advises concerning the old JBL's 15" but he's looking for something currently in production :D For the moment he's testing a single speaker cab with a Jensen P12N but it...
by Zokk
13 May 2014, 17:09
Forum: DIY Stompbox designs
Topic: Quasi Filter Sample Hold design
Replies: 7
Views: 3544

Re: Quasi Filter Sample Hold design

Thanks for sharing this one!
I like this flutter effect a lot, however on the attacks it sounds strangely, as if there was an enveloppe detector but with "the reverse output" driving the filter.
Is there a way to remove this inorder to have a more "flat" response of the filter?
by Zokk
05 May 2014, 21:24
Forum: Modern Stompbox Effects (1975 - ...)
Topic: T Rex Room-Mate [gutshots]
Replies: 10
Views: 7031

Re: T Rex Room-Mate [gutshots]

Well edit button has gone away...

There's also an orange LED soldered just under the tube socket, it fits a 3mm hole inside the socket so it makes the tube a lot more "mojo-ish" 8)
by Zokk
05 May 2014, 21:20
Forum: Modern Stompbox Effects (1975 - ...)
Topic: T Rex Room-Mate [gutshots]
Replies: 10
Views: 7031

Re: T Rex Room-Mate [gutshots]

Hi

you're lucky: the pedal is dead but not yet buried :wink:
The transistor beside the xformer is a BC639... ICs are 7805CT, 78L09A and NE555.

Hope this helps.

Cheers.