Dave, these "RF generators are used for ISM (Industrial Scientific
Medical) use. One of the most common frequencies for this purpose is
13.56MHz.
When in services such as semiconductor manufacturing they are used for
generating plasmas, they typically have heavy hours, but are very clean,
since they spend most of their life in a clean room environment.
73,
George, K4GVT
DAVE WHITE wrote:
> This looks like an interesting piece of kit:
>
> http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&Item=330299130000&Category=1504
>
> An "A43984 Henry RF Power Supply".
>
> It looks a bit of a "home brew" solution to capacitors: Fixed doorknobs and
> adjust the last few pFof tune and load with a couple of sets of two plates,
> one on a thread with a sheet of PTFE in the middle, but I guess it works!
>
> I recently saw a 4PR1000A amp which had the opposite solution: fixed
> doorknob-type capacitors and a Pi inductor that was squeezed or stretched by
> a piece of threaded PTFE through the middle, though this one looks like a Pi-L
>
> I'd guess at around 10MHz, but there looks like quite a lot of L in the plate
> choke for that.
>
> If it's only run at 2kW out, I think that makes the tube potentially
> under-rated by 75% unless there's a really low HT.
>
> The transformer looks a bit smaller thsan many I've seen. I recently got a
> quote from TEC in Basildon for a 4.5kV at 10kva single phase transformer and
> it was going to weigh 250lbs and measure about 1 foot cubed. Oo-er. Nearly
> twice my weight. I did worry about putting this in an upstairs shack, but I
> guess it's only like a fat lad sitting in the corner!
>
> cheers
>
> Dave G0OIL
>
>
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