[sdiy] Adjusting bender range in JX8P

[Gordon JC Pearce]

On 16/09/12 21:30, Florian Anwander wrote:
> Hello Gil
>
> Gil W. wrote:
>> Just for the record - it was caused by low than usual supply voltages
>> (+12/-12 instead of +15/-15).
> Thanks for the feedback.
>
> Just to satisfy my curiousity: How can this be? Not an original
> powersupply?
>

The PSU is a little more complex than it needs to be, and if one of two 
resistors go high the voltages will be wrong.

In my case when the filter wouldn't close properly, what had happened 
was the thermal fuse in the transformer had opened, disconnecting the 
centre tap for the 15V supplies from the PSU.  This allowed the 
transformer windings to "float" and meant that I had a 15-0-8V supply rail!

-- 
Gordon JC Pearce MM0YEQ