Doepfer

> Hello everyone --
>
> I'm having a couple of problems with new modules --
>
> 1. On my new A-108 filter, the Emphasis knob does nothing, and
> nothing plugged into the Feedback jack is audible at all either, no
> matter the setting of the Emphasis knob. Is there a jumper setting or
> something that I can change to make this work, or might this be a
> defective module?

The emphasis of the A-108 is rather simple: nothing but a feedback from the
48dB output to the input via the switching socket labelled "Feedback" and
the attenuator "Emph.". Maybe the switching socket causes a problem. To find
this out patch the 48dB output to the Feedback socket (this connection is
normally active without external patch). If this does not help the module
has to be sent in for repair. Pay attention that a high (distorted) input
level may "overwrite" the feedback. Try to reduce the input level to find
out if then the emphasis occurs.

> 2. My new A-138c polarizing mixer arrived with no jumper on the pins
> labelled "offset opt." as there apparently should be, so that Input 1
> does not provide DC offset. For those of you in the U.S., is this
> jumper something I can find at Radio Shack? I also want to get one to
> turn the T&H to S&H on my new A-152 addressed switch module.

These are standard electronic parts used e.g. in computers, hard disks or
other equipment. You only have to pay attention that the jumpers have 2.54
mm grid (1/10"). The are cheap (~ 10 cent). We could add a bag of jumpers
for free to our next shipment to Analogue Haven (I assume that you ordered
the modules from Analogue Haven).

Best wishes
Dieter Doepfer

P.S. Next week I'm not in the office. No comments/response/answers to group
messages from me.