Re: Audio amplifier as AC power generator ?

On Tue, 8 Apr 2008 10:00:40 +1000, "Phil Allison"
<philallison@xxxxxxxxxx> wrote:


"John Farkin Lunatic "

We have a Peavey 400-watt per channel PA amp. We have a precision
home-made 2-phase sinewave generator that drives the amp, with
selectable phase angles. One amp output drives a step-up transformer
to give us 0-500 volts RMS. The other drives a step-down transformer
to make 0-200 amps into low impedance loads, namely current
transformers and shunts. We use this setup for development and
calibration of electronic wattmeters.

Works fine. We did change some caps in the amp to extend low frequency
response, to reduce phase shift at 50/60 Hz.


** Shame there is no comparison with the OP's loopy idea.

No saturation or inrush surge issues with your set up - is there ?



Haven't seen any. The ole Peavey is a tough mamma. When I told them
what I wanted to do, they sent me a schematic right away and suggested
which coupling caps to change. Real Southern gentlemen.

John



.

Relevant Pages

  • Re: Trace Elliot SuperTramp problems
    ... ocassionally crackles and splutters something rotten. ... I found in the past that resoldering the joints on the transformer has fixed the problem so I figured that the transformer isn't secured well enough and a knock in transit could be damaging the joints. ... of which there are *lots* in a valve amp. ... I had a similar sounding fault on my 200 watt Peavey Renown a few years ago - I took it to Peavey in Corby. ...
    (uk.music.guitar)
  • Re: Audio amplifier as AC power generator ?
    ... selectable phase angles. ... One amp output drives a step-up transformer ...
    (sci.electronics.design)
  • Re: Audio amplifier as AC power generator ?
    ... selectable phase angles. ... One amp output drives a step-up transformer ...
    (sci.electronics.design)
  • PS Bob
    ... Get the Vers 2 chip from Peavey for $25 incl shipping. ... The Transformer never caught ... Gotta change the speakers though, ... is basically a trantstube amp with effects built in. ...
    (alt.guitar)
  • Re: Audio amplifier as AC power generator ?
    ... I was looking for a low cost AC line simulator, something able to generator ... and a 48V/220V transformer driven on its secondary side. ... We have a Peavey 400-watt per channel PA amp. ... One amp output drives a step-up transformer ...
    (sci.electronics.design)
Quantcast