[sdiy] More on the AN299 VCO

[flightofharmony at comcast.net]

Oops, thanks! I should know better than to do this so early in the morning.

It's corrected now, and I'm running the circuit to get some drift measurements - It's running much better than before, but it is still drifting slowly (open-air, nylon protoboard). This might just be due to the warm-up period.

~flight
 -------------- Original message ----------------------
From: Neil Johnson <neil.johnson97 at ntlworld.com>
> Hi,
> 
> From: flightofharmony at comcast.net
> > 
> > Here's the adjusted schematic with the proper transistor placement taken into 
> account:
> > 
> > http://www.flightofharmony.com/stash/AN299_VCO_REV1.pdf
> > 
> > I just noticed something: When I first tried this, I assumed the inverted 
> triangle supply symbols were ground since the App Note doesn't specify a 
> negative voltage on the schematic. Did they mean -15V instead?
> > 
> > I'll go breadboard this (without the ancillary sections) and post the results.
> 
> Apologies if this has already been discussed, but it seems to me that you have 
> IC2A the wrong way round when compared to the schematic in AN-299.
> 
> Neil
> 
> 
> --
> http://www.njohnson.co.uk
> 
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