ASM-1 Problem

[Magnus Danielson]

From: "Debby and Gene Stopp" <squarewave at jps.net>
Subject: Re: ASM-1 Problem
Date: Sun, 30 Apr 2000 23:45:22 -0700

> Hi Paul,
> 
> I just realized that I can't read it either, on the copies that I send out!
> It's the resistor that takes the + input of the 3140 to ground, which is
> labelled 15K in the schematic. Most of the boards that I've built use 10K
> here - it's not really critical. 15K is just the textbook value.

Curiously enougth, looking at the ASM-1 VCF schematic available on my website
you can read clearly 15k, so checking those schematic can obviously be helpfull
at times even if they do contain a irritating number of minor errors.

> In the process I realized that the 1.8K resistor in the same place on the CV
> summing amp (+ input to ground) on the schematic has no place for a resistor
> on the PCB - it just goes straight to ground.

OUPS!!!

> No big deal electronically, but it's a mismatch between the schematic and
> the PCB, and probably the parts list too. My apologies to everybody about
> the inaccuracies - I always build PCB's from the trace/component level and
> worry about the documentation later.

Ah, and you don't let someone proofread it carefully before you release it?
Classic error ;)

> So, a message to all ASM-1 builders - thanks for the feedback, and don't
> hesitate to email me if you need help! There's probably a few more errors in
> there.

Also, proofread what's on the ASM-1 homepage and feedback to me corrections to
be done.

Cheers,
Magnus