[sdiy] need PCB layout for a +/-9V DC supply

[harrybissell]

In a rare move I'll half disagree with this one.

XLR connectors are extrememly reliable. If you make your OWN
cable with appropriate conductors, it will work fine.

If you use an 'off the shelf' cable, it could have the probelms that
Michael mentioned.

I use multi conductor XLRs for synth power, usually the six pin
connector. They are TOO expensive for this, but I had them for
a guitar synth and decided I needed a seven pin instead.

I am also using DB-25 cables for synth power from cabinet to
cabinet. I use multiple wires in parallel. I use off the shelf cables.
If one failed even one time I'd cut it in half (so I won't get fooled again :^)

I also use standard MIDI connectors and cables for power.

Here's a bad thing. If someone is unfamiliar with your system, and you use
standard cables... they could plug MIDI, or a Microphone etc... to a power source
and kill something.

Did you hear about the guy who found a good, cheap way to wire his speakers
to his PA ??? He used standard 120V AC plugs.  He put sockets on the power
amp case, and just cut the ends off of extension cords for the speakers.

Can you guess where his speakers got plugged in ???   :^P

H^) harry

WeAreAs1 at aol.com wrote:

> In a message dated 9/14/05 1:58:10 PM, danjel at gmail.com writes:
>
> << Is an XLR cable a good
>
> way to connect +9, 0 and -9 to the synth? >>
>
> Hello Danjel,
>
> I don't think you should use a standard XLR cable for that job.  It's very
> common for XLR cables to be mis-wired, or to have small intermittent shorts in
> them.  This might be problematic for a microphone cable, but it could be
> disastrous for a power supply connection.  A properly wired XLR cable will work, but
> I still think it's too risky.  It's probably best to use one of the polarized
> 3 or 4 pin Amphenol connectors (like the ones used in most modern modular
> synths -- check www.blacet.com for more info)
>
> Michael Bacich