Thanks guys for all the feedback! Jim WD5JKO
Also, Check out the following links. A 1000vA elgar is in the first link for
$200.00
http://www.sg-photo.com/powersup.htm
http://www.surplussales.com/PowerSupplies/PowerS-1.html
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED]
> Sent: Saturday, January 18, 2003 10:09 AM
> To: [email protected]
> Subject: Re: [AMRadio] Today's AC Mains voltage too high for many BA
> Rigs
>
>
> Hi John,
>
> I don't have a digital camera of my own, but can easily borrow
> one and send
> you a picture. They are heavy. About 70lbs. They use no
> filtering. They are
> high quality, audio power amplifiers, in series with the
> secondary of a split
> bobbin, shielded power transformer. The transformer is
> responsible for most
> of the weight. The amplifier can make about 70 volt ac, and is
> connected in
> series with about an 80 volt winding of the transformer. They use an
> oscillator, that is PLL locked to the line, and the output of
> this oscillator
> is the reference to the amplifier. The amplifier will buck or boost, real
> time, to make the output look just like the input. (the sine wave
> oscillator)
> The transformer in these units are beautiful. They have full faraday
> shielding between primary and secondary, including shielded coax
> type leads
> in and out. The line is completely isolated from the load. The unit is
> configurable to allow full isolation including it's own floating neutral.
> These units are beautifully built, and were well over $1000 when
> they were
> new 25yrs ago, but they can be found today for about $35 on the
> used market.
>
> The only thing I did before using them in the shack, was to
> install 20amp EMI
> filters on the input and output. This is to keep rf out of the
> unit. I run
> legal limit from time to time and didn't want rf getting in and
> causing it to
> misbehave. Although I have not tried running them without the
> filters. The
> units may work just fine without them. I mounted the input filter
> directly on
> the rear apron. I cut the power cord and ran it through the
> filter first. The
> output filter is identical to the input filter. I have a short power cord
> (about 8") plugged into the back of the line conditioner, and the filters
> output is connected to a power strip where I have all my radio
> gear plugged
> in.
>
> I'll send you a picture as soon as I can John. They are
> distinctive looking
> enough to spot them from a distance at a flea market. They are a
> great asset
> to any shack.
>
> 73, Ed
> AA8TV
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