I'll stick to my MRF157s :) Nothing beats them when coming to IMD at High
power.
I have a design cooling the devices with liquid N2 kipping the die at -187F.
A pair puts out
2100W with -42dB IMD.
But it took me 16months to get here :)
Alex, N2NNU
----- Original Message -----
From: "Tom Rauch" <w8ji@akorn.net>
To: <amps@contesting.com>; "John T. M. Lyles" <jtml@lanl.gov>
Sent: Tuesday, November 27, 2001 7:24 PM
Subject: Re: [AMPS] new FETs
>
> > Advanced Power Technology in Oregon is coming out with the ARF1500
> > series of high voltage RF power MOSFETS. Due 4Q01, these monsters are
> > for class C -->E operation, with 1500 watt dissipation limit. There is
> > one operating point for the 1501 suggested at 900 watts output, 300
> > VDC Vdd, 17 dB gain, at 27 MHz. For linear class AB operation, they
> > now have a 150 Volt part, the ARF 463, for 100 Watts CW up to 100 MHz.
> > Whats neat about the APT parts is that they offer them in mirror image
> > packages for P-P layouts.
>
> How is the IMD performance of the linear devices John?
>
> We have enough dirty tetrode amps on the bands, I wonder if the
> IMD of these devices is state-of-the-art in IMD? I know the class C
> designs weren't good enough.
> 73, Tom W8JI
> W8JI@contesting.com
>
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