[Elecraft] KPA500 active devices!!

[juergen]

Hi Brian

Digikey has  them listed for about 154 dollars per piece.

The datasheet mentions superb IMD performance however there is no IMD data on the datasheet. I wonder if they perform as well as the MRF150's?  in  terms of IMD performance.


John

--- On Sat, 4/17/10, Brian Alsop <alsopb at nc.rr.com> wrote:

> From: Brian Alsop <alsopb at nc.rr.com>
> Subject: Re: [Elecraft] KPA500 active devices!!
> To: 
> Cc: elecraft at mailman.qth.net
> Date: Saturday, April 17, 2010, 4:42 PM
> Just for curiosity, what do a pair of
> VRF2933 cost?  Availability?
> 
> 73 de Brian/K3KO
> 
> Guy Olinger K2AV wrote:
> > At any phase angle with no signal degradation. 
> Minimum 20 dB gain,
> > 300 watt output 400 typical per device.  So being
> operated very
> > conservatively.
> > 
> > On Sat, Apr 17, 2010 at 7:22 PM, S Sacco <nn4x.steve at gmail.com>
> wrote:
> >> The VRF2933 is rated "3:1 Load VSWR Capability at
> Specifi ed Operating
> >> Conditions" according to its datasheet; perhaps
> that's why there no
> >> built-in ATU.
> >>
> >>
> >>
> >> On Sat, Apr 17, 2010 at 6:44 PM, Doug Faunt N6TQS
> +1-510-655-8604
> >> <faunt at panix.com>
> wrote:
> >>> 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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