Search found 15 matches

Just out of curiosity, did you ever make any changes to your VCA for +/- 15V operation?

*cough* I only saw your post almost a year later...

Anyway - No, I didn't change anything and the VCA stil ...

OK, and here's the PCB pics

It would be nice if you could put some pictures of both side pcb

OK, here we go -

it seems I can't add more than 5 pics to one post, so I'll have to do it in two posts.

Oscilloscope pics a ...

Hi,

thanks for your reply Very Happy

!

Did you used BC547? Matching pair was OK?

Yes and yes - and it was no problem at all to trim the CV bleedthrough to almost invisible and inaudible.

I'm asking ...

Hi,

I built the YuSynth Steiner filter (absolutely perfectly - except for one thing:

The filter does actually self oscillate when the resonance is cranked up sufficiently, but does so in a rathe ...

Still need an answer?

Well yes... did you (have to) change any values and if yes, what are they?
Or does yours work nicely on 15V with all the original values in Ray's schematic?

Always provide ...

If I understood you correctly, this is about proper 1V/octace tracking calibration, right?

- remove all input signal from the filter
- turn up resonance until the filter starts to self oscillate ( ...

Hi everyone,

I'd like to add a few more VCAs to my system (completely DIY including cases and PSUs), which is kind of hybrid and has both +/- 12 and 15 V PSUs.

I'll add another 5U case in which ...

the only issue i have is usable frequency range of the LFO - it should NOT run this fast - it should go from minutes to just below audible range - no more than 200 hz or so

Well, Ray described it a ...

I got the module working today. Sometimes mistakes are so obvious you don't see them although (or because?) they are so simple. We call that "not seeing the forest for all the trees" in Germ ...

you will not be able to get redily
SSM2210

At least the SSM2210 are more or less readily available as SMD ICs (I got mine off Ebay, and they weren't too expensive). There are tiny adapter PCBs ava ...

I'm still no further with this...

It's exactly the same as in mine. As far as I can tell, the problem sits in the onboard mic preamp.

I have constant 260 mV on pin 1 of IC1 resulting in about 1 ...

In some very rare cases of extremely popular instruments you may be able to find a version that someone has scanned in.

[url=http://elektrotanya.com/yamaha_dx21_sm.pdf/download.html]Here is the ser ...

Hi everyone,

does anyone have the manual for the vintage Brother PDC-100 MIDI sequencer that he or she could send me as a printed copy or PDF (preferably in English or German)?

Web search lead ...

Hi,

first of all, hello to everyone here Very Happy

!

My Minibrute encounters the apparently not-so-unknown problem of noise being thin and grainy after having connected a CV/gate sequencer, in my case ...

Author	Message
Topic: MFOS Dual Log/Lin VCA - value changes for +/- 15 V?
Bodo1967 Replies: 4 Views: 4980	Posted: Wed Nov 24, 2021 3:40 am Subject: MFOS Dual Log/Lin VCA - value changes for +/- 15 V? Forum: DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Bodo1967 Replies: 4 Views: 4980	Just out of curiosity, did you ever make any changes to your VCA for +/- 15V operation? cough I only saw your post almost a year later... Anyway - No, I didn't change anything and the VCA stil ...
Topic: Steiner VCF - strange self oscillation problem
Bodo1967 Replies: 4 Views: 5287	Posted: Sat Sep 19, 2020 12:39 pm Subject: Steiner VCF - strange self oscillation problem Forum: DIY Hardware and Software » YuSynth
Bodo1967 Replies: 4 Views: 5287	OK, and here's the PCB pics
Topic: Steiner VCF - strange self oscillation problem
Bodo1967 Replies: 4 Views: 5287	Posted: Sat Sep 19, 2020 12:32 pm Subject: Steiner VCF - strange self oscillation problem Forum: DIY Hardware and Software » YuSynth
Bodo1967 Replies: 4 Views: 5287	It would be nice if you could put some pictures of both side pcb OK, here we go - it seems I can't add more than 5 pics to one post, so I'll have to do it in two posts. Oscilloscope pics a ...
Topic: Steiner VCF - strange self oscillation problem
Bodo1967 Replies: 4 Views: 5287	Posted: Mon Sep 14, 2020 11:28 pm Subject: Steiner VCF - strange self oscillation problem Forum: DIY Hardware and Software » YuSynth
Bodo1967 Replies: 4 Views: 5287	Hi, thanks for your reply ! Did you used BC547? Matching pair was OK? Yes and yes - and it was no problem at all to trim the CV bleedthrough to almost invisible and inaudible. I'm asking ...
Topic: Steiner VCF - strange self oscillation problem
Bodo1967 Replies: 4 Views: 5287	Posted: Mon Sep 14, 2020 5:21 am Subject: Steiner VCF - strange self oscillation problem Forum: DIY Hardware and Software » YuSynth
Bodo1967 Replies: 4 Views: 5287	Hi, I built the YuSynth Steiner filter (absolutely perfectly - except for one thing: The filter does actually self oscillate when the resonance is cranked up sufficiently, but does so in a rathe ...
Topic: MFOS Dual Log/Lin VCA - value changes for +/- 15 V?
Bodo1967 Replies: 4 Views: 4980	Posted: Fri Sep 04, 2020 12:18 am Subject: MFOS Dual Log/Lin VCA - value changes for +/- 15 V? Forum: DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Bodo1967 Replies: 4 Views: 4980	Still need an answer? Well yes... did you (have to) change any values and if yes, what are they? Or does yours work nicely on 15V with all the original values in Ray's schematic? Always provide ...
Topic: Ultimate Expander Calibration
Bodo1967 Replies: 1 Views: 3108	Posted: Wed Aug 19, 2020 6:05 am Subject: Ultimate Expander Calibration Forum: DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Bodo1967 Replies: 1 Views: 3108	If I understood you correctly, this is about proper 1V/octace tracking calibration, right? - remove all input signal from the filter - turn up resonance until the filter starts to self oscillate ( ...
Topic: MFOS Dual Log/Lin VCA - value changes for +/- 15 V?
Bodo1967 Replies: 4 Views: 4980	Posted: Wed Aug 19, 2020 3:21 am Subject: MFOS Dual Log/Lin VCA - value changes for +/- 15 V? Forum: DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Bodo1967 Replies: 4 Views: 4980	Hi everyone, I'd like to add a few more VCAs to my system (completely DIY including cases and PSUs), which is kind of hybrid and has both +/- 12 and 15 V PSUs. I'll add another 5U case in which ...
Topic: Delayed modulation module failure
Bodo1967 Replies: 9 Views: 11780	Posted: Mon Sep 10, 2018 12:28 am Subject: Re: usable LFO Freq Forum: DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Bodo1967 Replies: 9 Views: 11780	the only issue i have is usable frequency range of the LFO - it should NOT run this fast - it should go from minutes to just below audible range - no more than 200 hz or so Well, Ray described it a ...
Topic: Delayed modulation module failure
Bodo1967 Replies: 9 Views: 11780	Posted: Sat Sep 08, 2018 8:07 am Subject: Delayed modulation module failure Forum: DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Bodo1967 Replies: 9 Views: 11780	I got the module working today. Sometimes mistakes are so obvious you don't see them although (or because?) they are so simple. We call that "not seeing the forest for all the trees" in Germ ...
Topic: MFOS VCO BOM
Bodo1967 Replies: 4 Views: 6458	Posted: Fri Apr 27, 2018 5:11 am Subject: Re: Parts Forum: DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Bodo1967 Replies: 4 Views: 6458	you will not be able to get redily SSM2210 At least the SSM2210 are more or less readily available as SMD ICs (I got mine off Ebay, and they weren't too expensive). There are tiny adapter PCBs ava ...
Topic: Vocoder issues...
Bodo1967 Replies: 12 Views: 17856	Posted: Mon Mar 12, 2018 7:13 am Subject: Vocoder issues... Forum: DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Bodo1967 Replies: 12 Views: 17856	I'm still no further with this... It's exactly the same as in mine. As far as I can tell, the problem sits in the onboard mic preamp. I have constant 260 mV on pin 1 of IC1 resulting in about 1 ...
Topic: The Yamaha Manual Library
Bodo1967 Replies: 17 Views: 43301	Posted: Mon Aug 29, 2016 3:22 am Subject: The Yamaha Manual Library Forum: How-tos » Manuals, Instructions, and Documents
Bodo1967 Replies: 17 Views: 43301	In some very rare cases of extremely popular instruments you may be able to find a version that someone has scanned in. [url=http://elektrotanya.com/yamaha_dx21_sm.pdf/download.html]Here is the ser ...
Topic: [Solved] Brother PDC-100 manual, anyone?
Bodo1967 Replies: 0 Views: 5942	Posted: Thu Aug 11, 2016 1:47 am Subject: [Solved] Brother PDC-100 manual, anyone? Forum: How-tos » Manuals, Instructions, and Documents
Bodo1967 Replies: 0 Views: 5942	Hi everyone, does anyone have the manual for the vintage Brother PDC-100 MIDI sequencer that he or she could send me as a printed copy or PDF (preferably in English or German)? Web search lead ...
Topic: Minibrute noise broken
Bodo1967 Replies: 0 Views: 5365	Posted: Thu Aug 11, 2016 12:38 am Subject: Minibrute noise broken Forum: Instruments and Equipment » Arturia Synths
Bodo1967 Replies: 0 Views: 5365	Hi, first of all, hello to everyone here ! My Minibrute encounters the apparently not-so-unknown problem of noise being thin and grainy after having connected a CV/gate sequencer, in my case ...