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 Forum index » DIY Hardware and Software » Jürgen Haible designs
Triple Chorus Caps - Substitute Values?
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AndyR1960



Joined: Feb 16, 2007
Posts: 284
Location: Manchester UK
Audio files: 5

PostPosted: Tue Oct 06, 2009 7:48 am    Post subject: Triple Chorus Caps - Substitute Values? Reply with quote  Mark this post and the followings unread

Hi all,

After putting it off for the past year or so, I've finally got round to building the triple chorus... I'm on the last 3 x 2.7nf poly caps, but the closest value I have is either 2.2nf or 3.3nf. Does anybody know if these would be ok? It's either that or waiting for another order from Mouser (and the hefty postage costs to the UK).

Thanks,

Andy.
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jhaible



Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24

PostPosted: Tue Oct 06, 2009 10:49 am    Post subject: Re: Triple Chorus Caps - Substitute Values? Reply with quote  Mark this post and the followings unread

AndyR1960 wrote:
Hi all,

After putting it off for the past year or so, I've finally got round to building the triple chorus... I'm on the last 3 x 2.7nf poly caps, but the closest value I have is either 2.2nf or 3.3nf. Does anybody know if these would be ok? It's either that or waiting for another order from Mouser (and the hefty postage costs to the UK).

Thanks,

Andy.


Just use 2.2nF and 470pF in parallel connection.

JH.

_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f)
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AndyR1960



Joined: Feb 16, 2007
Posts: 284
Location: Manchester UK
Audio files: 5

PostPosted: Thu Oct 08, 2009 3:19 am    Post subject: Re: Triple Chorus Caps - Substitute Values? Reply with quote  Mark this post and the followings unread

jhaible wrote:


Just use 2.2nF and 470pF in parallel connection.


Many thank Jurgen - works like a dream Very Happy

Out of curiosity. I had a look at the Omni/Quadra chorus board and was surprised how simple ARP's design was... just 3 LFO's directly feeding the delay lines, no slow/fast cross modulation or 120/240 phase shift.

Have 3 spare TCA350Z hanging around... not sure what to do with them, as there's little info about them around!
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jhaible



Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24

PostPosted: Thu Oct 08, 2009 8:53 am    Post subject: Re: Triple Chorus Caps - Substitute Values? Reply with quote  Mark this post and the followings unread

AndyR1960 wrote:
jhaible wrote:


Just use 2.2nF and 470pF in parallel connection.


Many thank Jurgen - works like a dream Very Happy

Out of curiosity. I had a look at the Omni/Quadra chorus board and was surprised how simple ARP's design was... just 3 LFO's directly feeding the delay lines, no slow/fast cross modulation or 120/240 phase shift.

Have 3 spare TCA350Z hanging around... not sure what to do with them, as there's little info about them around!


I think the Omni chorus is very pleasant, too.
Here's my TDA1022-based version of it:
http://www.jhaible.de/polykorg/jh_polykorg_ens1.pdf
http://www.jhaible.de/polykorg/jh_polykorg_ens2.pdf

JH.

_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f)
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