Thanks, I appreciate the information. The FM Broadcast station, that I do
engineering, just purchased a new to the market Harris 10 KW transmitter, that
just arrived today. Installation the next few weeks. I took special notice of
the hot pluggable PA transistor amplifier modules using this transistor. It
gets 70% efficiency. With stands very high VSWR ....... 73 Bruce-K1FZ
Tom, I did not find any linear specs also, but did find a blurb saying it
was quite linear up to a KW.
Think will try a 900 Watt amp first, time permitting. Thank you for your
research information.
Jacques, FB working with Freescale the manufacturer.. Looking like the device
over drives at about 1 KW
producing high harmonics, the third being trouble some. Thank you for your
information.
Although they do not (or did not) publish IMD data, the single device I
tried was acceptable at 800-900 watts PEP for SSB. They are a bit better
than 4 x MRF150 in power, but still very similar. I'd say with correct
heatsinking and airflow, you could make a good 800-watt plus linear
amplifier from one. (From Tom W8JI)
with conventional output matching networks the third harmonic distortion is
extremely high around -7 to -8 dB ( second harmonic is OK because of the
push pull configuration of the PA) Jacques F6BKI
now retired but spend my working life with TRW , MOTOROLA and
FREESCALE RF semiconductors
John N4NU Thank you for your email. That old linear must have been fun.
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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