An inexpensive approach is to use a $29.95 inverter, purchased at one of the
auto parts stores on sale, then use a 120 v to 12 volt transformer. That
will give you what you want for about $35 - and give you 120 volts in your
car for other things.

You could build you own inverter, but at that price it is hardly
worthwhile - unless you need smething smaller.

Colin K7FM


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Thanks for the input guys. Looks like i will go with the inverter to
transformer for the 12vac. Seems to be really the only way. Any idea how
clean the output off the transformer would be? How clean is the output
directly off a power invertor. The 12vac that i need is for an audio
application.
tks
COLIN LAMB wrote:
An inexpensive approach is to use a $29.95 inverter, purchased at one of the
auto parts stores on sale, then use a 120 v to 12 volt transformer. That
will give you what you want for about $35 - and give you 120 volts in your
car for other things.

You could build you own inverter, but at that price it is hardly
worthwhile - unless you need smething smaller.

Colin K7FM


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In article , jrd wrote:
Thanks for the input guys. Looks like i will go with the inverter to
transformer for the 12vac. Seems to be really the only way. Any idea how
clean the output off the transformer would be? How clean is the output
directly off a power invertor. The 12vac that i need is for an audio
application.

You still haven't answered the question about what you want to run.

If it's for an audio application, it's probably because the device is
producing a bipolar supply inside, for +/-15V op-amp circuits. And it
is probably somewhat sensitive to supply input noise, if it is typical of
typical consumer-grade audio gear.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

its for a stereo generator to convert mono to stereo for my recording
hobby. The generator requires 12vac
tks
Scott Dorsey wrote:
In article , jrd wrote:

Thanks for the input guys. Looks like i will go with the inverter to
transformer for the 12vac. Seems to be really the only way. Any idea how
clean the output off the transformer would be? How clean is the output
directly off a power invertor. The 12vac that i need is for an audio
application.


You still haven't answered the question about what you want to run.

If it's for an audio application, it's probably because the device is
producing a bipolar supply inside, for +/-15V op-amp circuits. And it
is probably somewhat sensitive to supply input noise, if it is typical of
typical consumer-grade audio gear.
--scott

"jrd" wrote in message
...
its for a stereo generator to convert mono to stereo for my recording
hobby. The generator requires 12vac
tks

The stereo generator likely takes it to a rectifier / capacitor inside the
unit to produce DC anyway ..
you could tap (and feed 12 vdc) beyond the rectifier (and maybe capacitor) -
if it was a straight 12 vdc conversion.

gb

In article , jrd wrote:
its for a stereo generator to convert mono to stereo for my recording
hobby. The generator requires 12vac

Keep going. What kind of stereo generator.....
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."

"Any idea how clean the output off the transformer would be? How clean is
the output directly off a power invertor. The 12vac that i need is for an
audio application."

If the power supply is converting back to dc, it should not be a problem.

The only time it would be of concern is if something gets into the audio
section by transfer outside of the desired path. I would try it and you
will probably find that it is fine.

I have used miy inverter for various projects and never found that the less
than perfect sine wave caused any problems.

73, Colin K7FM



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thanks guys, my questions are answered!
COLIN LAMB wrote:
"Any idea how clean the output off the transformer would be? How clean is
the output directly off a power invertor. The 12vac that i need is for an
audio application."

If the power supply is converting back to dc, it should not be a problem.

The only time it would be of concern is if something gets into the audio
section by transfer outside of the desired path. I would try it and you
will probably find that it is fine.

I have used miy inverter for various projects and never found that the less
than perfect sine wave caused any problems.

73, Colin K7FM



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Checked by AVG anti-virus system (http://www.grisoft.com).
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