----- Original Message -----
From: "Dick Hanson" <k5and@austin.rr.com>
> The tubes used were PL509 or PL519; the article interchanges both numbers,
> so go take your choice. The switching supply delivers 1200V and is called
> "
> an off-line, full-bridge, phase-controlled, quasi- resonant converter
> operating at 100KHz.
> The 3rd order distortion products are shown on the scope at -35db @ 2KW
> PEP.
I should be noted that the 3IMD for the amp is -35dB below the
single tone power, which would place it -41dB below PEP which
I think is how ARRL specifies everything in test reports. This is
pretty good. Unfortunately, the higher order products don't seem
to fall of as quickly as one might want them to.
Mike, W4EF......................
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