http://elecraft.85.s1.nabble.com/News-from-Visalia-tp4914396p4919201.html
> From: Joe Subich, W4TV <
[hidden email]>
> Subject: Re: [Elecraft] KPA500 active devices!!
> To: "'Doug Faunt N6TQS +1-510-655-8604'" <
[hidden email]>,
[hidden email]
> Date: Saturday, April 17, 2010, 4:45 PM
>
> The VRF2933 is rated for 300 Watts each according to the
> data
> sheet on the manufacturer's web site (Microsemi) ... That
> makes
> their use in a 500 W amplifier reasonable from an IMD
> perspective.
>
> The VRF 2933 minimum gain is also 20dB (23 dB typical) so
> it
> would appear that the KPA-500 should be capable of clean
> operation with 5 W of drive (e.g., K3 in low power mode).
>
> 73,
>
> ... Joe, W4TV
>
>
>
>
> > -----Original Message-----
> > From:
[hidden email]
>
> > [mailto:
[hidden email]]
> On Behalf Of Doug
> > Faunt N6TQS +1-510-655-8604
> > Sent: Saturday, April 17, 2010 6:45 PM
> > To:
[hidden email]
> > Subject: [Elecraft] KPA500 active devices!!
> >
> >
> > There are two VRF2933's in push-pull, so they're not
> 750
> > watts each, but per pair. There are only three
> amps in
> > existance, and no devices have been destroyed
> (yet). Again,
> > 500 watts is a very conservative rating. It's been
> key-down
> > for 10 minutes withy no problems.
> >
> > 73, doug
>
>
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