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 Forum index » DIY Hardware and Software
Scott bernardi PT2399 VC delay
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Sebo



Joined: Apr 27, 2007
Posts: 550
Location: Argentina

PostPosted: Wed Dec 18, 2013 11:53 am    Post subject: Reply with quote  Mark this post and the followings unread

In the first page, 9th post, below the components layout picture is a link to the PDF with the PCB layout.
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pieca



Joined: Sep 03, 2015
Posts: 2
Location: paris/france

PostPosted: Thu Sep 03, 2015 2:20 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi,

thanks everyone for this topic. I've successfully build this delay !
Everything works as expected but…
I'm using it with my yusynth modular and my vcos output is 10 Vptp, which is really huge for this delay. I have to really attenuate my signal before going to the delay in order to avoid distortion.

Is it a way to attenuate the input level with some resistors change and a way to amplify the delayed signal more (with some resistors change too?)


An other thing I've noticed, is that the direct delay out is out of phase.
This is not the case with the mixed output.

Thanks for your help !!!!
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pieca



Joined: Sep 03, 2015
Posts: 2
Location: paris/france

PostPosted: Mon Sep 21, 2015 5:01 am    Post subject: Reply with quote  Mark this post and the followings unread

Ok, I've found the trick!

il order to be able to works with my Yusynth Oscillators (10v Ptp), I have to attenuate the input before going to the PT2399 first.
for that, you have to put a resistor between the signal and the group to booth inputs.
After that, the PT2399 will stop saturate.

But, your signal is going to be very weak…
so you have to amplify it…
for that, IC2A will let us to boost the signal
lowering R8 to 10k and changing R9 accordingly to your input attenuation will do it


Hope this will help…
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Sethkaine



Joined: Sep 26, 2015
Posts: 16
Location: Suisse

PostPosted: Mon Sep 28, 2015 2:49 am    Post subject: Reply with quote  Mark this post and the followings unread

I've gotta try this out.
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jbeuckm



Joined: Nov 30, 2008
Posts: 128
Location: minneapolis
Audio files: 9

PostPosted: Wed Dec 30, 2015 1:20 pm    Post subject: Reply with quote  Mark this post and the followings unread

xi-boy wrote:
i want to use this with +/- 12 volt
do i need to change anything ?

thanks

edit: got it successfully to run with +/- 12 volt


Could you let me know which schematic and any mods?

Thanks!
Joe
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j.baars



Joined: Jan 11, 2008
Posts: 16
Location: netherland

PostPosted: Sat Mar 26, 2016 1:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

i did make a eagle pcb design, sort of.
with gerber files.


vcdelay.zip
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 Filename:  vcdelay.zip
 Filesize:  12.39 KB
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vcdelay.zip
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 Filename:  vcdelay.zip
 Filesize:  12.39 KB
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