[sdiy] Yusynth VCO

[Csaba Zvekan]

> Cool.. any idea what other (more classic?) VCO design they are based
> on or the closest to?
I'm sure Yves could answer that for you as he designed it. He answers his emails usually very quickly and is very helpful if you get stuck somewhere.
> 
> I think I noticed your name mentioned on the Yusynth page :-)
Yes , there is a little picture of my module . It shows the thermal bonding of the hand matched transistors.

> How much did the cost work out to for you?
I think that LM394 and the OPA2137 precision op-amp is a bit more than your usual TL074 but hey it's a VCO ... and precision is required , right. You can save some money by going straight for the matched BC547s . I really don't know how much the total cost of one module was. It's been a while.

Definitely worth building one or eight :) !


Csaba

> 
> BTW, here's the page with board/schematics for anyone who's interested:
> http://yusynth.net/Modular/EN/VCO/index.html
> and some (sadly mp3) demos of a modular based on yusynth modules. They
> sound real nice:
> http://www.rainbow-serpent.de/index.php?page=modular
> 
> Cheers
> D.
> 
> 
>> Yes, I have built six of them . Even with hand matched transistors just to try them out. They work wonderful . A truly great design.
>> 
>> Csaba
>> On Apr 3, 2010, at 9:05 PM, cheater cheater wrote:
>> 
>>> Hi guys,
>>> I was wondering if anyone here has used/built the Yusynth VCO. Any
>>> thoughts about it?
>>> 
>>> Anyone know what design it is based on? I'm still nowhere near good
>>> enough to read the schematics on that thing :-)
>>> 
>>> Thanks
>>> D.
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>> 
>>