Hi Joe Have you seen any IMD data on these devices?
John --- On Sat, 4/17/10, Joe Subich, W4TV <li...@subich.com> wrote: > From: Joe Subich, W4TV <li...@subich.com> > Subject: Re: [Elecraft] KPA500 active devices!! > To: "'Doug Faunt N6TQS +1-510-655-8604'" <fa...@panix.com>, > elecraft@mailman.qth.net > 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: 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 > ______________________________________________________________ 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
