[sdiy] ARP 4027-1 VCO cloning?

[Luís Marka]

Hi,
Actually I am referring to resistors like 1.65K, 8.87K, 30.1K, 1.37K, 61.9K,
84.5K, 45.3K and a 33.2K in parallel with a 3.3M - this, in my math, is
32.87K, right?
Could I just use the closest commercial values available? If these resistors
are that critical, I can just use series & parallel associations to get
closer to the values in the schematics. Just wonder if someone already tried
that, 'cause this would make the way to a working clone much easier.
By the way, the schematics for the 4027-1 module are in
http://www.oldcrows.net/arptech/modmain.htm (thanks, Scott!)

Seeya,
Luis Marka

----- Original Message ----- 
From: <WeAreAs1 at aol.com>
To: <rtellason at blazenet.net>; <synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, August 25, 2004 1:07 PM
Subject: Re: [sdiy] ARP 4027-1 VCO cloning?


>
> In a message dated 8/25/04 8:02:41 AM, rtellason at blazenet.net writes:
>
> << I haven't seen a schematic of that part yet,  though I have downloaded
> some
>
> ARP stuff off the 'net and haven't sorted it all out yet.  So I'm not sure
>
> what you refer to there about the resistor values... >>
>
> He might be referring to the 1.87K tempcos that ARP used in that module
and
> some of their other VCO's.
>