MRFE6VP61K25H, Last update 04 APR 2013     (coax drawing & articles links), 50 MHz & 432 MHz & 1296 MHz SSPA links


dubus
Dubus Q4 2010

MRFE6VP61K25H 144 MHz F1JRD
close up picture of the MRFE6VP61K25H 144 MHz  prototype.

board

PCB size is 12 cm x 7.3 cm


data
Typical measurement


IMD
IMD performances at 800W PEP


Youtube video of the amplifer running at 50V  2.5A Idq


Youtube video of the amplifer running at 44V low Idq (for non linear mode)
Board is black coated for accurate temperature measurement

 

More information are available in DUBUS Q4 / 2010.

Article present one of my latest design with the MRFE6VP61K25H from Freescale semiconductor, this new unmatched LDMOS transistor allow design from 1.8 MHz to 600 MHz,

This amplifier can be operated in linear (SSB) operation or class C (CW/ FSK / JT ) for improved efficiency.
 
1K25

1250W

layout

BOM

input

output

coax

Errata from dubus article,
    -  PCB supplier is not Taconic but Arlon, TC350 reference is correct.
    -  Fig 10 is IMD at 400W , Fig 11 is IMD at 200W (could be read on spectrum screen)

Find detail about the copper heatspreader here,
note that is was done for originaly done for US (4/40) screws,

Also mechanical side is very important in this design, you need to respect recommendation about mounting surface requirement:
flatness need to be 0.4mils/inch or better
also Freescale recommends the criteria of average
roughness (Ra) of 32 micron-inches

You can, found recomendation about that in these 2 application note:

http://www.freescale.com/files/rf_if/doc/app_note/AN3263.pdf


http://cache.freescale.com/files/rf_if/doc/app_note/AN1617.pdf



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Full articles could be found :

Freescale reference design

Dubus on RFHAM FTP

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Looking 50 MHZ:
ftp://ftp2.rfham.com/rfham/SSPA6M.pdf

Looking 432 MHZ KW, 2x MRFE6VP5600H:
ftp://ftp2.rfham.com/rfham/432MHzSSPA.pdf

Looking for 23cm SSPA:

http://www.freescale.com/files/rf_if/doc/data_sheet/MRF6V13250H.pdf

Next to come: HF amplifier !  prototype working, be patient for publication ...
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BEKO use also the new MRFE6VP61K25H in it's brand new HLV1000 & HLV2000.
Very good design and integration from Bernhard ! very compact full amplifier including supply and all protections

RFHAM
  Passive component kit & transistor for building this amplifier, 

Dubus

F1TE website 


Lucien F1TE has designed very great control & security boards around the amplifier
These boards have been sucessfully tested on MRF6VP11KH (earlier version of the design with lower power)


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Tags: MRFE6VP61K25H, LDMOS, F1JRD, Solid state amplifier, Freescale, Rugged transistor, Gain, High efficiency, MRF154, MRF157,HF amplifier, Ham radio,