[Moon-Net] RF FET selection for 432 MHZ SSPA
e.krome at comcast.net
Wed Nov 30 18:34:05 CET 2016
Look at "w6pql.com" or "rfham.com", (although something may be wrong with the latter; my anti-virus says it is compromised). These 432 pallet amplifiers (for 50, 144 1nd 432 MHz) use the MRFE6VP5600H dual LDMOS transistor. On 432, 4W in gets 500W out. Run on 48VDC. Fairly easy to build and very tough and reliable. I've built all 3; 50 MHz gets 600W out with 1W in, 144 MHz gets 500W out for 1W in (this is the easiest version to build). Awesome stuff. I've written several papers on them if you would like to see them. There are also 1+KW versions. These were first shown in DUBUS 4/2012.
----- Original Message -----
From: "Rick Muller" <rick.muller at asml.com>
To: "moon-net" <moon-net at mailman.pe1itr.com>
Sent: Wednesday, November 30, 2016 11:58:29 AM
Subject: [Moon-Net] RF FET selection for 432 MHZ SSPA
Busy here building a SSPA for 432 Mhz
Currently using a MRF 186 .. with 8 watt RF in I get about 90 Watt out .. using 26 Volt supply
I could replace the MRF 186 with another RF FET , my power suppl y can deliver up to 48 Volt with 25 Amp and the heat sink is big .
I am not an “ advanced “ RF builder so I do not know which FET to select .. there are new ones on the market every week ..
But changing the FET could also mean changing the design .. what kind of parameters are critical if you replace one type FE T with the other ??
73’s Rick, PA1BVM
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