Hello all,
You all know me as a QRP station :-) But today i want to run even less
power!
While running in the sunny afternoon i got the idea to build a very
small and weak PA. After some playing arround it came to me that it
will be a class-E PA. The power supply should be a lemon battery, i.e.
a homemade galvanic element, maybe 2 in series!
The desired RF power is arround 20...40 mW, at 2 V DC. And i'm using a BS170
MOSFET for that PA. The biggest part will be the BNC jack :-)
So far i'm testing with an empty 9V battery and a 100 Ohm resistor in
series. I measured 2V and 35mA. But the PA is not yet aligned for class
E mode. Probably the efficiency is less than 50% in the moment.
Anyway several stations seem to copy me :-)
More reporting stations are apprechiated, if you like to test your
sensitive RX :-)
73, Stefan/DK7FC
PS: Later, i want to try to rectify some RF coming from AFN to my
antenna. It this is fed to a 10F gold cap and WSPR-2 in 33% ratio is
sent, maybe i can run that PA from the energy of AFN :-)
|
|
