[sdiy] ARP VCO drift

[Dan Snazelle]

by the way..to some of us this is NOT a boring topic. info on how to deal with this stuff is highly valuable!

thanks







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> From: steve at willacy.co.uk
> To: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] ARP VCO drift
> Date: Sun, 10 Aug 2008 13:46:44 +0100
>
> I'd go with a transistor pair in a single package as Ray suggests but
> as they are a complementary pair there are fewer choices. I heard
> about a BC847 (but haven't tried one yet) which is a 6 pin
> complementary pair in SMT form - solder on some wires and ride it
> piggy back on the Tempco and it maybe just the thing!
> Steve
>
> On 10 Aug 2008, at 11:49, rob wrote:
>
>> he transistor pairs are not matched, but are in contact with the
>> Tempco.
>> There is some improvement by getting this contact.
>> The original ARP 2600 VCO's are of course encapsulated....
>>
>> Where am I going wrong?! Any ideas?
>
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