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powering Serge on +/- 15v

2009-07-20 by deadcustomers

specifically, I've got a Dual Phaser and a VCFS that I'd like to put into a panel with some +/- 15v gear and I'm wondering what issues I'd run into if I powered those Serge modules that way.

The datasheets on all the IC's all seem to be rated for at least +/- 15v, although there is one IC on the VCFS that I haven't been able to identify because it's sandwiched between two small PCB's.

I'd guess that the v/oct tracking on the VCFS wouldn't scale normally, but I don't think I care about that. So what other issues am I looking at?

thanks!

powering Serge on +/- 15v

2009-07-20 by sasami@hotkey.net.au

I can see no reason why it would be an issue. I run some Serge stuff on 15
volts anyway. That sandwiched chip is just a common dual up-amp. LF353 (TL072).

Disclaimer: Mind you, if it all goes up in smoke, don't blame me.

Ken

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>specifically, I've got a Dual Phaser and a VCFS that I'd like to put into a

panel with some +/- 15v gear and I'm wondering what issues I'd run into if I
powered those Serge modules that way.

>
>The datasheets on all the IC's all seem to be rated for at least +/- 15v,

although there is one IC on the VCFS that I haven't been able to identify
because it's sandwiched between two small PCB's.

>
>I'd guess that the v/oct tracking on the VCFS wouldn't scale normally, but

I don't think I care about that. So what other issues am I looking at?

>
>thanks!
>

_______________________________________________________________________
Ken Stone sasami@... otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

Re: powering Serge on +/- 15v

2009-07-21 by deadcustomers

Thanks Ken, this is great!

I went ahead and powered those modules and another panel on +/- 15v and it all seems to be working. In case it's useful to anyone, here's a list of the modules I've tested:

VCFS
VCFQ
Dual Phaser
Frequency Shifter
Wave Multipliers
Wilson Analog Delay
Dual VCA
Dual Channel Stereo Output
Dual Audio Mixer

Modules that are untested but nothing blew up:
Control Module
Preamp Detector

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--- In SergeModular@yahoogroups.com, sasami@... wrote:
>
>
> I can see no reason why it would be an issue. I run some Serge stuff on 15
> volts anyway. That sandwiched chip is just a common dual up-amp. LF353 (TL072).
>
> Disclaimer: Mind you, if it all goes up in smoke, don't blame me.
>
> Ken
>
> >specifically, I've got a Dual Phaser and a VCFS that I'd like to put into a
> panel with some +/- 15v gear and I'm wondering what issues I'd run into if I
> powered those Serge modules that way.
> >
> >The datasheets on all the IC's all seem to be rated for at least +/- 15v,
> although there is one IC on the VCFS that I haven't been able to identify
> because it's sandwiched between two small PCB's.
> >
> >I'd guess that the v/oct tracking on the VCFS wouldn't scale normally, but
> I don't think I care about that. So what other issues am I looking at?
> >
> >thanks!
> >
> _______________________________________________________________________
> Ken Stone sasami@... otherunicorn@...
> Modular Synth PCBs for sale <http://www.cgs.synth.net/>
> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
>

Re: powering Serge on +/- 15v

2009-07-21 by sprgroups@o2.co.uk

> I went ahead and powered those modules and another panel on +/- 15v

and

> it all seems to be working. In case it's useful to anyone, here's a

list of the

> modules I've tested:

Do you have a good reason not to add a +/-12v PSU to
your system or a pair of voltage regulators to provide 12v?
I know the STS PSUs aren't cheap, but a Power One or
Condor linear +/-12v can be bought and boxed up
fairly cheaply, or a pair of regulators could be added to your
15v rack for v ery little cost. Then your Serge modules will
work correctly....

Steve

Re: powering Serge on +/- 15v

2009-07-21 by deadcustomers

> Do you have a good reason not to add a +/-12v PSU to
> your system or a pair of voltage regulators to provide 12v?
> I know the STS PSUs aren't cheap, but a Power One or
> Condor linear +/-12v can be bought and boxed up
> fairly cheaply, or a pair of regulators could be added to your
> 15v rack for v ery little cost. Then your Serge modules will
> work correctly....
>
>
> Steve

Well I have a Serge PS6 that I've been using, but this stuff is going into a portable case with other +/- 15v gear so having one PSU for the entire system is desired.

I thought about using some regulators for the serge stuff, but Ken's response didn't indicate he'd run into any issues, so it didn't seem necessary. Additionally, I seem to remember reading somewhere that regulators are switching so it seemed like something that's better to avoid if it's not required.

I could imagine that some values might have slightly higher base values so the range of some controls might change a bit, but would anyone even notice (myself included)?

Do you know of issues that I'll run into that will keep the modules from working correctly?