Wednesday, June 03, 2009

Airband rf preamplifier


No big deal here, the preamplifier is working... sort of... with the antenna connected to my Kenwood TM-D700 I have S4, with the preamp on in circuit and same antena I have S5, funny is with the preamp in line and no power I have S2, so the last coil in the circuit is a very good antenna!
This results are really subjective...since I have no means to test deeper I have to trust the S-meter...

Bellow the antenna, the circuit in test (with the magic cable adapter) and the schematic.
I changed some components from the original drawing... when I have all boards connected will try to improve the design.

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