ElectroNotes 129 TZVCO PCB Layout

v-un-v · Posted: Sat May 15, 2010 3:35 am Post subject:

I should add, it would be great if Oakley sound also sold Ian's kits, here in the UK. But that's between Mr Fritz and Mr Oakley Very Happy

andrewF · Posted: Sat May 15, 2010 5:49 am Post subject:

Rykhaard · Joined: Sep 02, 2007 Posts: 1290 Location: Canada

Luka · Joined: Jun 29, 2007 Posts: 995 Location: Melb.

ah ok
fair enough

2thick4uni · Joined: Feb 20, 2009 Posts: 108 Location: UK

Thanks for the info, a sad tale indeed.

2thick4uni · Joined: Feb 20, 2009 Posts: 108 Location: UK

Sebo · Joined: Apr 27, 2007 Posts: 517 Location: Argentina

Hi:
I recently finished building the TZ VCO. Thank you Forbin for the PCB layout!!!

I did a really nice MOD to it. I posted the details at this post:
http://electro-music.com/forum/post-369187.html#369187

ryktnk · Posted: Tue Mar 05, 2013 3:04 am Post subject: E129 Through Zero VCO HELP !

Hello

I hope somebody can help.

I have built this wonderful VCO 3 times [2 x breadboard, 1 x PCB]

But I always get some problems with instability when I
use a modulation freq obout 1khz and above, with a lower carrier VCO freq.

Seems to get really unstable and produces some
unpleasant and unpredictable glitches.

With modulation freq below 1khz it is great.

Anybody have any ideas what could be causng the problem ?

Cheers
-ryk

Sebo · Joined: Apr 27, 2007 Posts: 517 Location: Argentina

Hi, mine works well, I didn't experiment what you say, but in mine, when the modulation freq is higher than the carrier freq, the modulation index decreases, I'm no sure if that correct.
Also I feel that the modulation index in general isn't as high as I was expecting (compared to other VCOs I have), but I think that's could be a low output of the VCA, I have to check.

ryktnk · Posted: Tue Mar 05, 2013 2:41 pm Post subject:

Hello

Thanks Sebo.

I have the modulation cranked up high.
It is ok at very low modulation, but of course
that is before "through zero" so not so much fun !

-ryk