Doepfer

> -----Ursprüngliche Nachricht-----
> Von: ethanzer0 [mailto:ethanzer0@yahoo.com]
> Gesendet am: Dienstag, 16. Juli 2002 17:51
> An: Doepfer_a100@yahoogroups.com
> Betreff: [Doepfer_a100] My A-121 has turned into a radio receiver.....
>
> Hello,
>
> I recently moved my A-100 system farther
> from my mixer and connected it via a longer
> unshielded cable - mini to phone.  Now, when
> I use the A-121 in a patch, I am getting
> considerable noise and in HP mode it has
> received FM (or possibly AM, I didn't investigate
> enough) Mind you, I am a big fan of the A-121 and
> the 12db HP sound.  What can I do to mitigate
> the noise present in my system now?  Am I
> even considering the component responsible for
> the noise?

With a few excpetions the A-100 modules are designed to be used within the A-100
system, i.e. connections via short shielded cables (A-100 patch cables). Using
long unshielded cables may cause malfunction of the modules, especially HF noise
due to the high capacitive and/or inductive loads caused by long cables.
Solution might be the usage of another module connected between the A-121 output
and your mixer. Try one of these modules as the "interface" to your mixer: A-139
Headphone Amplifier (is able to drive even capacitive loads), A-138 mixer,
A-130/131 VCA. These modules have outputs that are not that sensitive when using
longer cables.

Best regards
Dieter Doepfer
Doepfer Musikelektronik GmbH
http://www.doepfer.de
email: hardware@doepfer.de