here hard to copy you because your TX frequency is not clear at this
moment.
Andy.
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
:-)
