[Amps] NXP 65V LDMOS 1K80H-1800W

[Paul Baldock]

Next Tuesday I will receive the first in the USA SPE 1.5K-FA. This 
uses a single device unlike the Flex or Elecraft. Some publications 
say the SPE uses the MRF1K50HR5 and others the MRF1K80HR5, so I'm 
uncertain. Apparently it runs at 48V in the MAX setting.

- Paul  KW7Y


At 09:37 AM 12/23/2017, Jim Thomson wrote:
>Date: Sat, 23 Dec 2017 06:50:38 -1000
>From: M Gerber <wh7w.us at gmail.com>
>To: amps at contesting.com
>Subject: [Amps] NXP 65V LDMOS 1K80H-1800W
>
><I am sure there are those of you anxiously awaiting your KPA1500 or
><Flex/4O3A Power Genius XL. It appears the RF Kit B26-RF2K5 from Germany is
>gaining popularity and even Palstar has a new SSPA offering, the LA-1K.
>
>These 65V LDMOS transistors have been out for a little while and can
>already be had from stock at Mouser for $277/ea.
>
>https://www.nxp.com/products/rf/rf-power-transistors/rf-broadcast-and-ism/1-600-mhz-broadcast-and-ism/1800-w-cw-over-1.8-400-mhz-65-v-wideband-rf-power-ldmos-transistor:MRFX1K80H
>
>https://www.mouser.com/ProductDetail/NXP/MRFX1K80HR5/?qs=BZBei1rCqCBcq3ESZPU7bw%3d%3d
>
>I suspect only a matter of time before someone has an offering using 1 or 2
>of these devices.
>
>I have used a HP ESP120 50V 57.5A retired server power supply to power my
>W6PQL SSPA. Biggest issue I see for home builder is getting a 65V ~50A
>power supply. A new TDK-Lambda adjustable 80V 65A power supply would be
>perfect but set you back a small fortune.
>
>73/Happy Holidays
>
>Mark WH7W
>
>##  I see on the flex website, that if anybody orders their shiny 
>new  Power genius b4 the end of this month, that Flex will also 
>include, at no extra charge, the mating outboard tuner !  Cant 
>remember if it is
>auto or not, has memories or not.   I still dont  know what the new 
>flex power genius is actually rated at.  They say 1.5 
>kw  ICAS.    What the heck does that imply ?    That does not sound 
>like 1.5 kw  rtty
>or FM to me.  On their U tube video, just running 1.5 kw on CW,  you 
>can hear the myriad of fans screaming in the background.     The 
>price, including outboard tuner is $6999.00   IMO, that is a lot of $$
>for a 1.5 kw  ICAS SS amp.
>
>## One possible fix for the new  65 vdc LDMOS  devices is to wire 
>a   50 vdc switching supply in series with a 13.8 vdc  switching 
>supply, or a 13.8 vdc  analog supply, or  crank up the vdc on 
>the  13.8 vdc supply,
>to 15 vdc, if you wanted the 65 vdc .   63.8 vdc is probably good enough.
>
>## I suspect its only a matter of time b4  a  75-100 vdc LDMOS 
>becomes the norm.
>
>Jim  VE7RF
>
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