All Flex-3000 users:
The dropout voltage of the 5V regulator is 2.5V, all the lower voltage
regulators are LDO types.
I have completed a few simple low voltage tests, the production calibration
tests all pass at ~11.4V.
The preamp is the only non-regulated voltage active component in the receive
path and has .3 dB less gain at this reduced voltage.
Tested the transmitter on 20mtr USB with a recorded wavefile: Info panel
reads ~10.7 V, Powermaster wattmeter: 83W (Tune @100 drive level) and
listened on a F5K audio sounded same as full voltage of 13.8V.
The Flex-3000 was used mobile traveling from Austin, Tx to the Dayton, Oh
Convention, and return trip operating as K5FRS, with no technical problems,
although band conditions were not the best.
Ken Simmons, K5UHF
FlexRadio Systems
Senior Design Engineer
13091 Pond Springs Rd. #250
Austin, TX 78729
Phone: 512-692-9044
"Tune in excitement!" T
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