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 Forum index » DIY Hardware and Software » Developers' Corner
Moog ladder VCF capacitor types..
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jpdesroc



Joined: Dec 05, 2007
Posts: 53
Location: Canada
PostPosted: Wed Apr 23, 2014 10:03 am    Post subject: Moog ladder VCF capacitor types.. Reply with quote  Mark this post and the followings unread
I saw that the original Moog 904a and 904b used
orange Mallory types capacitors for their filter stages.
I'm considering to use better and stable types like
polystyrene or mica ..
Does the type of these caps really matters ??

JP
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Baloo



Joined: Jul 09, 2013
Posts: 16
Location: France
PostPosted: Tue May 06, 2014 10:56 pm    Post subject: Reply with quote  Mark this post and the followings unread
I think the improve could not justify the cost due to good mica caps tends to be expensive. In similar era synths with derivates designs (SH3,System 100, SH2000 ...) I´ve never seen any mica cap.
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3phase



Joined: Jul 27, 2004
Posts: 1189
Location: Berlin
Audio files: 13
G2 patch files: 141
PostPosted: Sat Jul 12, 2014 8:58 am    Post subject: Re: Moog ladder VCF capacitor types.. Reply with quote  Mark this post and the followings unread
jpdesroc wrote:
I saw that the original Moog 904a and 904b used
orange Mallory types capacitors for their filter stages.
I'm considering to use better and stable types like
polystyrene or mica ..
Does the type of these caps really matters ??

JP


You should be careful here.. The so called orange drops have a name for a good tonal quality..that is not given automatically for any type of caps.
Better technical data is not automatically a better sound. ESpecially in synth circuits.

In any case you will change the tonal quality since the cap types can add a lot to that. To the better or worse depends o the type of cap..and older is often better here..as long they are not broken.. old metal paper caps where real metal foil is wound together with waxed paper, can sound really nice.. but are very expensive and huge

There are better caps than the orange drops..but will that be a better sound or just a different sound in a moog circuit? Or is it making things worse on the long run because its lost its original character?

Vintage synths should´nt be repaired with modern parts. IMO
even the op amps sound different now than same type and brand did 35 years ago. Smae applies to all other parts incl the resistors.. and they all add up to the specific sonic sinature of a synthziser.
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