System 700 modules questions..

[Wim Verheyen]

Hi Kim,

>I've just gotten three system 700 modules:
>VCF -1 ( 703A )
>VCF    ( 703C )
>2CH Audio delay ( 721A )
>
>Before i try to power them up, i wanted to ask if anybody
>on the list knew of any wise precautions/measurements/checking
>to do beforehand ?

There are some calibrations, but these are not required in order to just try
the modules out.
On the VCF these are for range (tuning) and offset.
On the delay these are for delay time and clock cancellation.

>I've got the Schemos and layouts.
>The boards take + and - 15 V which i can supply from my Asm-1 PSU,
>but they've also got a connection for +14.4 V for the LEDS..
>Do they need this or can i try them out with just the +-15 V ?

The requirements for the VCF's are : +14.4V +/- 5% @ 11mA
For the delay : +14.4V +/- 5% @ 6mA
14.4 + 5% = 15.12 so you could provide +15V here as well.
Better though to have a roughly stabilised supply for the 14.4 V, separated
from the precisely stabilised 15 V supply.

I have the instruction manual of the System 700 with specifications and
calibrations. I could copy the relevant bits for you and snail them ;-)

Greetings,
---------------------------------------------
 Wim Verheyen
 catwim at innet.be
 http://www.club.innet.be/~year0828/wim.html
 belkurz or kurzbel on undernet irc
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