Doepfer

I just purchased an A-113 Subharmonic Generator used from Analogue Haven. I didn't run 
methodical tests on it yet. One of the first things I've noticed is works fine for only about 3 
midrange octaves of square input. Above or below it doesn't deliver suboctaves. It also 
seems to give up on vibrato. I just wanted to confirm if that's normal since I found it 
surprising not to see any specs on it's range in the  documentation that's out.

I've not transplanted it to another case to test yet but perhaps I have some unresolved 
power issues.

First off my case has a 230v A-100NT12 inside that I'm using the original owner's power 
converter on. I thought I'd ask again since while Dieter offered a warning about electrical 
danger on this group I still don't have an answer other than it's possible. I keep thinking 
I'd be better off running on 115v.

If so then let me rephrase the question. Would I be better off trying to trade my 230v PSU 
for a 115v one?

I think I still need to trade or obtain a new fuse, right? Since the 115v version uses a 
different rated fuse, correct?

Finally another factor is I'm using a 5V low cost adaptor, but the specs on that say it 
delivers 100mA and I've also got an A-191. So what would be an answer. I guess I could 
move my 5v modules to Analogue Solutions cases or would another low cost adaptor work 
in the same case, say a in different row? Or is 150mA within operating range?

> I just purchased an A-113 Subharmonic Generator used from Analogue Haven.
I didn't run
> methodical tests on it yet. One of the first things I've noticed is works
fine for only about 3
> midrange octaves of square input. Above or below it doesn't deliver
suboctaves. It also
> seems to give up on vibrato. I just wanted to confirm if that's normal
since I found it
> surprising not to see any specs on it's range in the documentation that's
out.

That's not normal. I just tested the A-113 in our demo systems. It follows
the incoming frequency (rectangle output of an A-110 was used) over 10
octaves without any problems. Pay attention that the controlling signal
should be a reactangle with about 50% duty cycle (e.g. not only short 10% or
90% pulses). Which signal is used in your patch as rectangle input for the
A-113 ?

> I've not transplanted it to another case to test yet but perhaps I have
some unresolved power issues.
>
> First off my case has a 230v A-100NT12 inside that I'm using the original
owner's power
> converter on. I thought I'd ask again since while Dieter offered a warning
about electrical
> danger on this group I still don't have an answer other than it's
possible. I keep thinking
> I'd be better off running on 115v.
> If so then let me rephrase the question. Would I be better off trying to
trade my 230v PSU
> for a 115v one?

If you are not familiar with electronics I'd ask a specialist to do the
modification. Indeed it's simple (removing two solder bridges and making two
new ones on the bottom of the PSU pcb) but the safety rules have to be
followed. Otherwise there is danger to life. We have a pdf file available
that describes the modification. You can get this document if you contact me
directly (hardware@doepfer.de).

> I think I still need to trade or obtain a new fuse, right? Since
> the 115v version uses a different rated fuse, correct?

You find the fuse values on our website: www.doepfer.com > FAQ > values for
A-100 fuses

> Finally another factor is I'm using a 5V low cost adaptor, but the specs
on that say it
> delivers 100mA and I've also got an A-191. So what would be an answer. I
guess I could
> move my 5v modules to Analogue Solutions cases or would another low cost
adaptor work
> in the same case, say a in different row? Or is 150mA within operating
range?

In this case two A-100AD5 on two different bus boards are required (one for
A-113 with 100mA, the second for the A-191).

Best wishes
Dieter Doepfer