John & Allen,
John has the specs right. For a small collection of email advice on how
to fix this power supply, go to:
http://teamchicago.com/imperial/imp-el.htm
Any updates, please let me know!
Bob
>
> The EL "black box" is an oscillator. The output voltage varies with the
> input (battery) voltage that is adjusted by the dimmer knob on the dash.
> The high voltage output is an AC voltage. I took one of these to work
> years ago and did a little bench testing: I measured a whopping 790
> Volts peak-to-peak with a frequency of 294 Hz (an AC voltmeter will give
> reading of about a third of this -- around 250 Volts RMS). The
> oscillator is pretty crude and the circuit suffers from the aging of a
> capacitor (it gets leaky and loads down and finally shorts the high
> voltage output) but the EL dash is pretty darned high tech even by
> today's standards!
>
> John B.
>
> On Fri, 25 Jan 2002 23:10:25 -0500 bandmgrinding@xxxxxxxx writes:
> > Hi John,
> > Thanks for the info. You don't happen to know what the output of
> > they)
> > " black box " should be and how it varies the dash lights? Is it the
> > cycles per second or the output voltage that changes. The shop
> > manual
> > just says 200 volts and 250 cps in the radio diagram, nothing about
> > what
> > controls it.
> > Thanks
> > Allan R.
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