Search found 293 matches

by Jarno
17 Oct 2023, 20:13
Forum: Davidoff Library
Topic: Jules Ryckenbusch, Balanced EQ Line Driver, EQ magazine, August 1993
Replies: 4
Views: 1191

Re: Jules Ryckenbusch, Balanced EQ Line Driver, EQ magazine, August 1993

How complex would you want it? And do you need balanced outputs? As instrument input, I can wholeheartedly recommend the FET circuit from Ray Marston from https://kk5na.com/FETs%20PT2.htm The circuit in figure 8 This is single supply Most of the balanced outputs I built are in eurorack format so I c...
by Jarno
17 Oct 2023, 13:01
Forum: Davidoff Library
Topic: Jules Ryckenbusch, Balanced EQ Line Driver, EQ magazine, August 1993
Replies: 4
Views: 1191

Re: Jules Ryckenbusch, Balanced EQ Driver, EQ magazine, August 1993

That implementation with the SSM2142 is a bit too barebones, IMHO. The datasheet mentions some resistors from the outputs to ground, and possibility of adding caps to the sense pins. Also, in a board I did I added big electrolytics to the powerlines. And that is excluding a protection against accide...
by Jarno
25 Sep 2023, 07:08
Forum: DIY Projects
Topic: Advice/Criticism needed: The Keelhauler, an (un)clean preamp.
Replies: 13
Views: 2867

Re: Advice/Criticism needed: The Keelhauler, an (un)clean preamp.

A lot going on :)
Indeed also interested in the behaviour of that servo biased FET, did you do any isolated simulation of that section of the schematic?
by Jarno
30 Aug 2023, 12:18
Forum: Amplifiers
Topic: The truth about Victory amps...
Replies: 8
Views: 2387

Re: The truth about Victory amps...

A little bit shady indeed, and the fact that he was so opaque about the involvement of Lee Anderton seems to not be accidental, I think he was instructed to do so. Not sure why, Thomann has plenty of house brands, and they are doing OK with this, uncertain why Lee would keep this under wraps. "...
by Jarno
12 Aug 2023, 21:10
Forum: Electric Guitar/Bass Wiring
Topic: Fishman Universal Rechargeable Battery Pack
Replies: 4
Views: 1665

Re: Fishman Universal Rechargeable Battery Pack

Ben Crowe from Crimson Guitars posted a video on youtube where he takes a apart a Fender Acoustasonic, which has Fishman Electronics and the batterypack.
by Jarno
23 Jun 2023, 07:35
Forum: Boutique Stompboxes dissected...
Topic: Electronic Audio Experiments w/ Obstructures - OxEAE Fuzz (gutshots, traced) [traced]
Replies: 6
Views: 6918

Re: Electronic Audio Experiments w/ Obstructures - OxEAE Fuzz (gutshots, traced) [traced]

including the die for that custom enclosure. That enclosure is very very cool, I like also how you've made that little inlay plate so you can use it for various products, easier to engrave/machine than a complete enclosure too. I like the "brutalist" style Here's the stage to play that pe...
by Jarno
15 Jun 2023, 21:39
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: MXR - Phase 100 [schematic]
Replies: 40
Views: 41881

Re: MXR - Phase 100 [schematic]

I want to pursue an idea of having a digital non cyclic lfo (or at least, less obviously so) in a Phase 100 circuit, but I do not want to touch the diy one I did years ago. Does anyone here have gerbers for a board? Ultimately I'll roll my own with the ATTiny Lfo onboard, but it would be goid to do ...
by Jarno
09 Jun 2023, 08:00
Forum: Boutique Stompboxes dissected...
Topic: Death by Audio - Echo Master (gut shots)
Replies: 21
Views: 9231

Re: Death by Audio - Echo Master (gut shots)

Use a full size 5v regulator, so LM7805 rather than LM78l05, that one caught me out at a few implementations of the PT2399 already. Also, why use 2 transformers for a balanced output, I mean a transformer balanced output can add a certain "something" to the sound, just not sure if these te...
by Jarno
09 Jun 2023, 07:53
Forum: Modern Stompbox Effects (1975 - ...)
Topic: MXR M114 Stereo 10 Band EQ
Replies: 4
Views: 876

Re: MXR M114 Stereo 10 Band EQ

Either a transformer with a smaller stray field (toroid), or some kind of mu metal shielding. I had a Dean Markley guitar amp which had the transformer right up against the spring reverb, causing reverb to hum, so I moved that to all the way down in the (combo) enclosure, is there more room in the M...
by Jarno
08 Jun 2023, 09:06
Forum: Modern Stompbox Effects (1975 - ...)
Topic: MXR M114 Stereo 10 Band EQ
Replies: 4
Views: 876

Re: MXR M114 Stereo 10 Band EQ

Maybe also get rid of the tantalum, and bypass the electrolytics with filmcaps? Tack caps on the power pins of each opamp to ground?

Wat values are the carbon resistors?
by Jarno
05 Jun 2023, 14:05
Forum: Software Room
Topic: VeroRoute - Free layout software for Vero, Perf, & PCBs [link]
Replies: 38
Views: 59980

Re: VeroRoute - Free layout software for Vero, Perf, & PCBs [link]

Somehow also managed to miss this for over 6 years :)
Pretty cool!
Even though I am quite enthusiastic about Eagle, it is excellent that this is qavailable on Android, as I only have a business laptop at the moment, keen to have a go with this CAD-E SW!
by Jarno
31 May 2023, 11:11
Forum: Electric Guitar/Bass Wiring
Topic: Alembic filter preamp PF-6
Replies: 2
Views: 2251

Re: Alembic filter preamp PF-6

We have that stuff as well, stripping it is a real PITA, at least the stuff that we have here. Those inline connectors are interesting as well, but knowing Alembic, probably heinously expensive (and I wonder if these are meant for this type of cable and thus lend themselves to proper crimping). Also...
by Jarno
25 May 2023, 19:36
Forum: Electric Guitar/Bass Wiring
Topic: Ashbory bass preamp
Replies: 3
Views: 1204

Re: Ashbory bass preamp

I built a ashbory style bass myself, in the shape of a Rickenbacker bass, and initially I tried a diy bridge and pickup using a piezo disc, but that didn't work, so I actually simply order an original replacement bridge and pickup. Also ordered the tuning machines actually, had to put a dowel pin in...
by Jarno
25 May 2023, 08:54
Forum: Modern Stompbox Effects (1975 - ...)
Topic: BOSS DS-1W waza craft [schematic]
Replies: 10
Views: 4005

Re: BOSS DS-1W waza craft [schematic] [schematic]

Wow, that is actually quite fancy, quite a lot discrete semiconductors. Cool, do wonder why they haven't used an internal smps to up the power supply voltage, since they have used a dedicatedncircuit for the bias voltage. Can you explain me what you meant? The supply is only stepped down and the bi...
by Jarno
24 May 2023, 19:51
Forum: Modern Stompbox Effects (1975 - ...)
Topic: BOSS DS-1W waza craft [schematic]
Replies: 10
Views: 4005

Re: BOSS DS-1W waza craft [schematic] [schematic]

Wow, that is actually quite fancy, quite a lot discrete semiconductors. Cool, do wonder why they haven't used an internal smps to up the power supply voltage, since they have used a dedicatedncircuit for the bias voltage.
by Jarno
20 May 2023, 21:24
Forum: Pedal Debugging & Troubleshooting Support
Topic: Bass preamp (similar to Fender ToneStack pre) - no output
Replies: 4
Views: 2146

Re: Bass preamp (similar to Fender ToneStack pre) - no output

Weird way to do noiseless biasing, and that 600k seems a typo to me, shouldn't cause it to not function though.