[Amps] Operational Input Impedance

[Jim Brown]

I don't know the microHam unit, but I use the LP-100A with two 
detectors, one on each power amp in my SO2R setup. One of the features 
of its firmware is that in this setup, it can be set to automatically 
switch the readout to the active transmitter. And yes, it will do 
exactly what Joe describes. It's an excellent unit.  Larry ships his 
detectors factory-calibrated to a pair of BNC cables that connect each 
detector to the unit. I bought a used unit from W6OSP's estate that came 
with a single detector. I added a second detector, and sent the unit 
back to Larry for calibration.

73, Jim K9YC

On 12/23/2017 2:23 PM, Joe Subich, W4TV wrote:
> microHAM SMORF and N8LP LP-100A will provide calibrated R+/-jX for
> this application. SMORF will allow "calibrating out" a known distance
> of standard cables.  Either unit has a remote sensor unit that can
> be connected to the input jack of the amplifier under test with a
> simple double female connector (essentially zero length line).