Low noise pre-amplifier for 144 MHz
There is nothing much revelatory
on this. It is a simple and standard design using BF998.
The signal path is bypassed by two CX-120P relays for TX. It easily survived about 400W in long-running contest.
The amplifier itself. There is the input tuned coil in the left section.
BF998 and the second tuned coil is in the right section.
Two CX-120P relays for by-passing the aplifier on TX.
Both parts are mounted the splash-proof plastics box.
SO239 on the left is the output (towards TCVR or PA).
SO239 on the right is the input (towards ANT).
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