Search found 111 matches

Thanks so much! I'm going to try it out...

Awesome!
cheers

The two I built before were for a customer so they are gone.
I need to build one for myself now!
but probably won't happen until ...

I'm assembling a couple Krautrocks and made some mods to it.
Want to share and get feedback from others.
Let me know if you see errors, have better/alternative ideas, etc.

I experimented and foun ...

Could the person responsible for taking money / shipping please respond to my PM?
Or
take five minutes and post an update to this thread?
At the very least, can you remove "boards in stock&quo ...

I need four Klee pcbs.
If you have one (or more) that you're willing to part with,
please, please contact me.

Thanks!

Few things I need to sell:

CGS28 - Sequential Switch - bare pcb - $10
pcb is the earlier version:
http://www.cgs.synth.net/modules/cgs28v10_seq_switch.html

L-1 Microcompressor
bare pcb - ...

My main question is this:

What is the "Deep" switch for?

I have read that it is for very large CV voltages.
But I don't get it.
What does it do to large CV voltages?
Anything that ...

Incidentally, I added pitch CV in two places:

Cool, thanks Kevin. I remember reading somewhere that Thomas was concerned about "large or negative" voltages being used for CV and blowing ...

MOTM format MPS module.
I have two for sale.

was $600 each

$500 each or $900 for the pair
+ shipping

With the power connector attached these are slightly less than 2" depth behind the ...

Peng, are you still selling these pcbs?

I am and they are in stock, too.
I plan to keep these in stockfor the foreseeable future.

I will also have two or three more pcb designs for sale within ...

Thank you everyone for your orders.
All were shipped out today via USPS 1st Class mail.
Hope they get to you quick.

The last page of the build dock is a blank parts placement sheet.
Use this to ...

Can you tell me how much shipping is to UK?

It depends on how many you want.
It seems that 1-4 pcbs shipped anywhere in Europe is $5.
5-7 pcbs is $6.

I just started a new thread for these.

http://electro-music.com/forum/post-368781.html#368781

I've had these in stock for a year now.
These started a couple years ago because I was addi ...

VCA Rider v5 pcbs

Linear VCA with extras.
The VCA core is a Mike Sims design from EDN magazine.
See here:

http://www.teaser.fr/~amajorel/sims/

The boards can be built in a variety of way ...

Output stage includes an extra input to mix in a signal post-VCA.
so you can easily use this VCA for voltage controlled FX return? clever.

That is a good idea!
I put that in there so I could wi ...

I want to see if there is any interest in DIY versions of my VCA Rider pcb.
These are bare pcbs - $10 each.
If there is interest I will write up detailed documentation and offer these for sale.

T ...

Wow!
It works!!!

Turns out it was a bad 3280.
I feel kinda dumb about this because it should have been caught before it was ever installed.
I have long been suspect of every 3280 and normally te ...

I pulled up one end of R23 (6.8K) and checked the current to pin 3 of U1a.
With both the coarse and fine controls full CW I get 0.87mA.
Adjusting the coarse and fine changes the current so those con ...

I get the +/-5V swing from A3 output.

Ian, thanks for responding.
This is a bridechamber MOTM kit build and I'm running on +/-15V.
All chips are getting power and the regulated voltage lines come out as:
+/-5V line = +4.9V/-4.92V
+/-7 ...

I have a Teezer built up and wired up but it is not working properly.
It does oscillate but it is sub audio oscillation and it does not respond to any frequency inputs or controls. I can see sine, tr ...

Peng, are you speaking of this site, specifically: http://www.sdiy.org/philgallo/mgbvca.html ?

No, I was talking about the SDIY mailing list:

http://dropmix.xs4all.nl/rick/Emusic/Synth-diy ...

Oh yeah, there is a long discussion about the 2164 going on at SDIY. Not related to class operation but power supply protection and other stuff.
Just a heads up.

I'll have to see if I notice any CV bleed.

I just clicked the link in the OP. The CA data is slightly different than the AD version. Control Feedthrough vs. Rbias is fig. 11 on the CA data she ...

Just let the pin float.

Definitely agree that if the choice is no resistor or a 7.5K resistor I'd leave it off.
For me the concern is less about class A or AB.
It's about the CV feedthrough.
Se ...

Still, the question remains about the 7.5k resistor. Does it have to be this exact value?

Don't use the 7.5K the data sheet suggests. This influences CV feedthrough and should be much larger. ...

Author	Message
Topic: Krautrock Phaser Mod = Voltage Control Input
peng Replies: 5 Views: 12326	Posted: Thu Sep 14, 2017 10:04 pm Subject: Krautrock Phaser Mod = Voltage Control Input Forum: DIY Hardware and Software » Jürgen Haible designs
peng Replies: 5 Views: 12326	Thanks so much! I'm going to try it out... Awesome! The two I built before were for a customer so they are gone. I need to build one for myself now! but probably won't happen until ...
Topic: Krautrock Phaser Mod = Voltage Control Input
peng Replies: 5 Views: 12326	Posted: Fri Mar 17, 2017 12:57 am Subject: Krautrock Phaser Mod = Voltage Control Input Forum: DIY Hardware and Software » Jürgen Haible designs
peng Replies: 5 Views: 12326	I'm assembling a couple Krautrocks and made some mods to it. Want to share and get feedback from others. Let me know if you see errors, have better/alternative ideas, etc. I experimented and foun ...
Topic: Klee Sequencer Circuit Boards Now On Sale
peng Replies: 135 Views: 377995	Posted: Fri Oct 17, 2014 1:41 pm Subject: Klee Sequencer Circuit Boards Now On Sale Forum: DIY Hardware and Software » Klee sequencer
peng Replies: 135 Views: 377995	Could the person responsible for taking money / shipping please respond to my PM? Or take five minutes and post an update to this thread? At the very least, can you remove "boards in stock&quo ...
Topic: WTB: Klee pcbs
peng Replies: 0 Views: 3627	Posted: Fri Sep 26, 2014 3:04 pm Subject: WTB: Klee pcbs Forum: Wanted, For Sale, Opportunities and Requests » Parts and Components
peng Replies: 0 Views: 3627	I need four Klee pcbs. If you have one (or more) that you're willing to part with, please, please contact me. Thanks!
Topic: FS: pcbs/DIY cgs sequential switch L-1 compressor MOTM490
peng Replies: 0 Views: 4177	Posted: Fri Sep 26, 2014 3:02 pm Subject: FS: pcbs/DIY cgs sequential switch L-1 compressor MOTM490 Forum: Wanted, For Sale, Opportunities and Requests » Parts and Components
peng Replies: 0 Views: 4177	Few things I need to sell: CGS28 - Sequential Switch - bare pcb - $10 pcb is the earlier version: http://www.cgs.synth.net/modules/cgs28v10_seq_switch.html L-1 Microcompressor bare pcb - ...
Topic: Resonant Lopass Gate PCB's (New Batch 4/29/12)
peng Replies: 926 Views: 743676	Posted: Thu Dec 05, 2013 7:33 am Subject: Resonant Lopass Gate PCB's (New Batch 4/29/12) Forum: DIY Hardware and Software
peng Replies: 926 Views: 743676	My main question is this: What is the "Deep" switch for? I have read that it is for very large CV voltages. But I don't get it. What does it do to large CV voltages? Anything that ...
Topic: The Thomas Henry Mega Percussive Synthesizer
peng Replies: 762 Views: 909167	Posted: Thu Jul 25, 2013 5:53 pm Subject: The Thomas Henry Mega Percussive Synthesizer Forum: DIY Hardware and Software » Thomas Henry designs
peng Replies: 762 Views: 909167	Incidentally, I added pitch CV in two places: Cool, thanks Kevin. I remember reading somewhere that Thomas was concerned about "large or negative" voltages being used for CV and blowing ...
Topic: FS: Mega Percussive Synth MOTM format
peng Replies: 0 Views: 1378	Posted: Thu Jul 25, 2013 12:30 pm Subject: FS: Mega Percussive Synth MOTM format Forum: Wanted, For Sale, Opportunities and Requests » Equipment/Software Wanted and For Sale
peng Replies: 0 Views: 1378	MOTM format MPS module. I have two for sale. was $600 each $500 each or $900 for the pair + shipping With the power connector attached these are slightly less than 2" depth behind the ...
Topic: VCA Rider v5 pcbs
peng Replies: 6 Views: 6453	Posted: Mon Jul 01, 2013 7:22 am Subject: VCA Rider v5 pcbs Forum: DIY Hardware and Software
peng Replies: 6 Views: 6453	Peng, are you still selling these pcbs? I am and they are in stock, too. I plan to keep these in stockfor the foreseeable future. I will also have two or three more pcb designs for sale within ...
Topic: VCA Rider v5 pcbs
peng Replies: 6 Views: 6453	Posted: Thu Sep 06, 2012 12:39 pm Subject: VCA Rider v5 pcbs Forum: DIY Hardware and Software
peng Replies: 6 Views: 6453	Thank you everyone for your orders. All were shipped out today via USPS 1st Class mail. Hope they get to you quick. The last page of the build dock is a blank parts placement sheet. Use this to ...
Topic: VCA Rider v5 pcbs
peng Replies: 6 Views: 6453	Posted: Tue Sep 04, 2012 1:23 pm Subject: VCA Rider v5 pcbs Forum: DIY Hardware and Software
peng Replies: 6 Views: 6453	Can you tell me how much shipping is to UK? It depends on how many you want. It seems that 1-4 pcbs shipped anywhere in Europe is $5. 5-7 pcbs is $6.
Topic: Gauging interest, VCA Rider, flexible VCA pcbs
peng Replies: 8 Views: 4082	Posted: Mon Sep 03, 2012 12:36 pm Subject: Gauging interest, VCA Rider, flexible VCA pcbs Forum: DIY Hardware and Software
peng Replies: 8 Views: 4082	I just started a new thread for these. http://electro-music.com/forum/post-368781.html#368781 I've had these in stock for a year now. These started a couple years ago because I was addi ...
Topic: VCA Rider v5 pcbs
peng Replies: 6 Views: 6453	Posted: Mon Sep 03, 2012 12:20 pm Subject: VCA Rider v5 pcbs Forum: DIY Hardware and Software
peng Replies: 6 Views: 6453	VCA Rider v5 pcbs Linear VCA with extras. The VCA core is a Mike Sims design from EDN magazine. See here: http://www.teaser.fr/~amajorel/sims/ The boards can be built in a variety of way ...
Topic: Gauging interest, VCA Rider, flexible VCA pcbs
peng Replies: 8 Views: 4082	Posted: Thu Aug 30, 2012 4:24 pm Subject: Re: Gauging interest, VCA Rider, flexible VCA pcbs Subject description: simple, small, quality VCA Forum: DIY Hardware and Software
peng Replies: 8 Views: 4082	Output stage includes an extra input to mix in a signal post-VCA. so you can easily use this VCA for voltage controlled FX return? clever. That is a good idea! I put that in there so I could wi ...
Topic: Gauging interest, VCA Rider, flexible VCA pcbs
peng Replies: 8 Views: 4082	Posted: Thu Aug 30, 2012 12:01 pm Subject: Gauging interest, VCA Rider, flexible VCA pcbs Subject description: simple, small, quality VCA Forum: DIY Hardware and Software
peng Replies: 8 Views: 4082	I want to see if there is any interest in DIY versions of my VCA Rider pcb. These are bare pcbs - $10 each. If there is interest I will write up detailed documentation and offer these for sale. T ...
Topic: TZFM SAW VCO
peng Replies: 536 Views: 619338	Posted: Mon Mar 19, 2012 12:33 pm Subject: TZFM SAW VCO Forum: DIY Hardware and Software
peng Replies: 536 Views: 619338	Wow! It works!!! Turns out it was a bad 3280. I feel kinda dumb about this because it should have been caught before it was ever installed. I have long been suspect of every 3280 and normally te ...
Topic: TZFM SAW VCO
peng Replies: 536 Views: 619338	Posted: Sun Feb 19, 2012 1:21 am Subject: TZFM SAW VCO Forum: DIY Hardware and Software
peng Replies: 536 Views: 619338	I pulled up one end of R23 (6.8K) and checked the current to pin 3 of U1a. With both the coarse and fine controls full CW I get 0.87mA. Adjusting the coarse and fine changes the current so those con ...
Topic: TZFM SAW VCO
peng Replies: 536 Views: 619338	Posted: Sun Feb 19, 2012 12:39 am Subject: TZFM SAW VCO Forum: DIY Hardware and Software
peng Replies: 536 Views: 619338	I get the +/-5V swing from A3 output.
Topic: TZFM SAW VCO
peng Replies: 536 Views: 619338	Posted: Wed Feb 15, 2012 7:30 pm Subject: TZFM SAW VCO Forum: DIY Hardware and Software
peng Replies: 536 Views: 619338	Ian, thanks for responding. This is a bridechamber MOTM kit build and I'm running on +/-15V. All chips are getting power and the regulated voltage lines come out as: +/-5V line = +4.9V/-4.92V +/-7 ...
Topic: TZFM SAW VCO
peng Replies: 536 Views: 619338	Posted: Wed Feb 15, 2012 9:32 am Subject: TZFM SAW VCO Forum: DIY Hardware and Software
peng Replies: 536 Views: 619338	I have a Teezer built up and wired up but it is not working properly. It does oscillate but it is sub audio oscillation and it does not respond to any frequency inputs or controls. I can see sine, tr ...
Topic: How important are these component values?
peng Replies: 11 Views: 5566	Posted: Wed Mar 02, 2011 12:40 pm Subject: How important are these component values? Forum: DIY Hardware and Software
peng Replies: 11 Views: 5566	Peng, are you speaking of this site, specifically: http://www.sdiy.org/philgallo/mgbvca.html ? No, I was talking about the SDIY mailing list: http://dropmix.xs4all.nl/rick/Emusic/Synth-diy ...
Topic: How important are these component values?
peng Replies: 11 Views: 5566	Posted: Wed Mar 02, 2011 3:20 am Subject: How important are these component values? Forum: DIY Hardware and Software
peng Replies: 11 Views: 5566	Oh yeah, there is a long discussion about the 2164 going on at SDIY. Not related to class operation but power supply protection and other stuff. Just a heads up.
Topic: How important are these component values?
peng Replies: 11 Views: 5566	Posted: Wed Mar 02, 2011 3:18 am Subject: How important are these component values? Forum: DIY Hardware and Software
peng Replies: 11 Views: 5566	I'll have to see if I notice any CV bleed. I just clicked the link in the OP. The CA data is slightly different than the AD version. Control Feedthrough vs. Rbias is fig. 11 on the CA data she ...
Topic: How important are these component values?
peng Replies: 11 Views: 5566	Posted: Tue Mar 01, 2011 2:51 pm Subject: How important are these component values? Forum: DIY Hardware and Software
peng Replies: 11 Views: 5566	Just let the pin float. Definitely agree that if the choice is no resistor or a 7.5K resistor I'd leave it off. For me the concern is less about class A or AB. It's about the CV feedthrough. Se ...
Topic: How important are these component values?
peng Replies: 11 Views: 5566	Posted: Sun Feb 27, 2011 11:34 pm Subject: Re: How important are these component values? Forum: DIY Hardware and Software
peng Replies: 11 Views: 5566	Still, the question remains about the 7.5k resistor. Does it have to be this exact value? Don't use the 7.5K the data sheet suggests. This influences CV feedthrough and should be much larger. ...