[sdiy] ARP 2500 op. amp.

[rob]

Hi
The ARP 2600 Service Manual explains how to replace a 1339 with a LM301.
Page 89.
You basically swap the 2n2F capacitor with 30pF. Swap the 390 ohm resistor
with a wire link, and remove the 10K resistor.
This will improve the sound too....

However you could easily use a better Op Amp and get rid of the 30pF
capacitor, such as a NE5534 or TL071.

Regards
Rob
www.emulatorarchive.com

-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Luís Marka
Sent: 22 October 2007 15:25
To: Synth-DIY (list)
Subject: [sdiy] ARP 2500 op. amp.


Hi folks,
I have an ARP 2500 1004-P VCO module that someone tried to "fix".  Well, 
now I want to fix this fixing, and one Teledyne 1339 op. amp. was 
removed from the board. I cannot locate any datasheets or specs for this 
IC, is there a modern equivalent??

Luis Marka
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