We used an audio amp and a signal generator. At 20W output you can use a
12V 2 amp filament transformer. Cheap.Tam
variable-frequency power source?
Oct 21, 2005
5 Replies
We need 120Vac @ ~10w, adjustable (and fairly stable) over 50-70hz. Cost is an issue.
Among other ideas:
- std signal generator -> audio amp -> step-up transformer.
- modify a UPS, so the frequency can be adjusted.
Does anyone have any experience/thoughts on these, or other better ideas?
Thanks, George
What distortion can you tolerate?
martin
Been there done that.
The amp isn't terribly happy with a typical psu on the output. Tends to trigger the protection.
Graham
Fairly gross: ultimately, the object is to simulate a gas-powered generator.
George
I recently used the first route, an HP200CD, a Quad 405 Amp into a
15-230vac transformer. It worked very well, but I did require a decent resistor across the amp output to keep it stable at all freqs (from 16 to 400 Hz)Barry Lennox
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