[amsat-bb] Vhf/Uhf amplifier for Icom Z1A?

[Zach Metzinger]

On 2/6/19 2:37 PM, Ken M wrote:
> On a related subject, I note the ARRL lab test of the FT-818 does not recommend amplifier use, which is disappointing as I suppose that reflects on the quality of it’s output signal.

This should be solvable with the appropriate output filter to knock down 
harmonics/spurious output.

A diplexer (such as the one at http://kw4fb.com/micro-diplexer) could be 
added before the amplifier on the 2m side, if that is the problem, with 
the 70cm port terminated in a 50 ohm load. On the 70cm path (or the 2m), 
one could apply a cavity filter (http://www.nx7u.net/4x3x5.html).

I don't have the ARRL test report, so I'm not sure why they don't think 
one should add an amplifier. If it is a transmitted phase noise problem, 
then, obviously, a filter won't solve the problem.

--- Zach
N0ZGO