[sdiy] DG201 vs LF13331

[Harry Bissell]

Thanks Mark. That's kind of what I remembered (without the data books here...)

H^) harry


----- Original Message -----
From: mark verbos <markverbos at gmail.com>
To: Harry Bissell <harrybissell at wowway.com>
Cc: aankrom <aankrom at bluemarble.net>, synth-diy at dropmix.xs4all.nl
Sent: Thu, 17 May 2012 12:53:14 -0400 (EDT)
Subject: Re: [sdiy] DG201 vs LF13331

In places where Buchla used the LF13331 it works fine to substitute a DG201, with the exception that the power pins are different. 

The FET switch chips that can be used as voltage controlled resistors are the AM97C11 (same as AH5011), which Buchla used as a voltage controlled resistor in the 296. 

Mark




On May 16, 2012, at 12:51 PM, Harry Bissell wrote:

> If they are being used as analog switches I'd suspect they might work fine, but the LF part number
> seems like a National Semiconductor part, and there were some where the 'control' signal was tied directly
> to the gate of an internal FET and they could be used as voltage controlled resistors. I don't put it past
> Don Buchla to have used a part like that... 
> 
> Is there a link to the schematic you're talking about ?
> 
> H^) harry
> 
> ----- Original Message -----
> From: aankrom <aankrom at bluemarble.net>
> To: synth-diy at dropmix.xs4all.nl
> Sent: Wed, 16 May 2012 12:22:20 -0400 (EDT)
> Subject: [sdiy] DG201 vs LF13331
> 
> I was wondering, since I have a lot of DG201's, if they would 
> substitute well in a circuit that called for LF13331's, such as the 
> Buchla 292C Lowpass Gate. I could look at datasheets I suppose but I 
> don't think I have one for the LF13331.
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> Harry Bissell & Nora Abdullah 4eva
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Harry Bissell & Nora Abdullah 4eva