New LDMOS power xistor

[W3RSW]

http://www.nxp.com/assets/documents/data/en/data-sheets/PRFX1K80H.pdf

"80" version upgrade to existing "50" version.

A pair of these in Parallel PP would be neat. This device apparently pretty rugged into mismatch.  Looking for IM figures at rating.





* info from I4LEC , another forum

[VE3ELQ]

Very nice Rick, good find. 
Looks like Aug production so should be available by fall. May retrofit my HB single BLF188XR amp and jack up the B+ to 65V. This stuff just keeps improving.
73s  Nigel

[Opcom]

Those must take a heck of a copper spreader. 1800W. How to cool that, water? refrigeration?

[W3RSW]

Looks like the prototyping boards come complete with 1/2 inch or better copper plates for starters to be fastened to greater sized finned aluminum finned radiators with fansor other cooling of choice.

[KF7WWW]

Where can one buy the whole proto set up?

[W1ITT]

These devices look like more fun every time their bigger iterations arrive.  I'd be cautious about just dropping them in to existing lower-power amps until the output transformer calculations were run again.  At the least, the design will be eating into core safety factors, and either heating or saturating.  And the upward creep of supply voltage makes things a bit easier, and might contribute to better IMD numbers, but that remains to be seen.  Perhaps water cooling the heat spreader starts to make sense.

[W3RSW]

Proto-boards shown here in the promotion literature.  Lots of copper and copper embedded in aluminum shells.
Very informative including the intent to have devices available for 15 years.

http://www.nxp.com/products/rf/rf-power-transistors/rf-broadcast-and-ism/1-600-mhz-broadcast-and-ism/1800-w-cw-over-1.8-470-mhz-65-v-wideband-rf-power-ldmos-transistor:MRFX1K80H?&tid=vanMRFX1K80H#featuresExpand

Boards may be available from the manufacturer as are the trial versions of the LDMOS .
I see Big output cores on the 27Mhz industrial freq. board. One could note the designers exact core and component specs. Just keep digging and drilling down.

[KB2WIG]

Anyone know what the co$t might be??

KLC

[W3RSW]

I'd guess cost not much more than the already available 50 volt version.
A very quick look-up at most supply firms yields this:

Here's the complete Mouser page including the proto boards for the 50 volt version, same dimensions for the upcoming 65 volt devices.

The 27 MHz board is "only" $1,333.    Hey with output filter board and an elementary shutdown board or two and your on the air!  Probably would work on 12 and 10 meters.  Understand from GFZ that transformer can be improved.

http://www.mouser.com/Search/Refine.aspx?Keyword=mrf1k50h

[John K5PRO]

Looking at the curves in that data sheet, these parts go into significant gain compression above about 1200-1300 watts. They would make very good ISM sources where linearity doesn't matter, at 1700 watts for example. But for reduced IMD, one can imagine back off will be required for linearity.

[KD6VXI]

I had the same thoughts, John.

As in, a pair would be OK for legal limit and clean operation.

--Shane
KD6VXI

[W1ITT]

NXP is having a webinar for those interested in the new 65 volt transistor.  May 10 2017.

http://lists.contesting.com/archives//html/Amps/2017-04/msg00295.html

[John K5PRO]

Yes, I would run them about 700-800 watts output to expect them to be linear. Might be really interesting parts for Class E, except too pricy compared to the few dollar plastic transistors that work in class E.