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: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Doug > Faunt N6TQS +1-510-655-8604 > Sent: Saturday, April 17, 2010 6:45 PM > To: elecraft@mailman.qth.net > 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 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
