开云体育

You need strict 50 ohm input and output impedances for these MMICs to
work properly which is kind of hard to do with the first amplifier on
a broadband antenna ... On a tuned loop with a small pickup loop it
would probably be alright but a plain ol' RF transistor would work as
well or better

You also have to be real careful applying a 1 Ghz amplifier for use in
the HF range because they have a tendency to 'go off' (Oscillate) in
the VHF range where you can't hear (And most people can;t see on their
scope) the result in the receiver but other than it's not working
right (Little or no gain, front end blocking, etc)

Personally I don't like to use them other than in transmitting amps
for the HF range, when you start getting into 2 Meters and up though
they are hard to beat because you can get decent gain and IP3 without
tuned circuits where the difference between a 2 1/2 turn inductor and
a 3 turn inductor can be several Mhz
JR