[sdiy] RFZ gear - negative voltage power supply?

[dancemachine]

yeah y'know i have heard of this before now that you mention it,
something about "reverse ground" or something like that.  connecting a
power supply in reverse like you mention should work just fine but I
have not tried it myself.  If I were faced with the challenge, I would
definitely do exactly that.


On Wed, Nov 3, 2010 at 6:05 PM, jure zitnik <kokoon at gmail.com> wrote:
> no, it's definitely -24V... it's obviously a common german thing from
> the old school broadcast consoles.
> i've read some about it, also, here's a pinout for one of them:
> http://german-modules.de-blog.jp/photos/uncategorized/2009/09/06/w735_1_pinout.jpg
>
> there's been some discussing of the subject on the prodigy-pro forums,
> but i haven't been able to find a definite answer.
>
>
> On Wed, Nov 3, 2010 at 8:38 PM, dancemachine <dancemachine at gmail.com> wrote:
>> really needs "-24V"? or maybe there is just a confusing dash in front of "24V"
>>
>> I am just speculating though
>>
>> On Wed, Nov 3, 2010 at 2:45 PM, jure zitnik <kokoon at gmail.com> wrote:
>>> Greetings, list!
>>>
>>> I'm sitting here in front of three ancient RFZ console modules, trying
>>> to wrap my head around this.
>>> I want to put them in a single enclosure and power them all from a single PSU.
>>>
>>> the modules are:
>>> 1x W735/1 (a two channel 7-band EQ)
>>> 2x V740/1c (a mono preamp)
>>>
>>> I have some vague info on the pinout and it says they take just a
>>> single -24V line for power...
>>>
>>> Now how exactly does that work? Can I just take a normal AC-DC 24V
>>> supply, hook the +24V to the module's ground and the supply's ground
>>> to module's -24V input?
>>> Does anybody know these specific modules? I read somewhere they don't
>>> even need regulated voltage... any ideas?
>>>
>>> Thanks a bunch,
>>> jure
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>>
>