[AMPS] exciter to amp coax length

[Tom Rauch]

> My tube and solid state amp has *input* adjustments for all bands. I
> suppose these adjustments are designed to compensate for these
> mismatches?

That's probably true. 

Once a load (in this case the amplifier) is adjusted for a 1:1 SWR, 
the length of the line between the amplifier and exciter won't matter 
at all. 

The only possible exception is instability someplace around the 
operating frequency or below the cut-off frequencies of the input 
network in the amplifier, where the amplifier depends on the source 
impedance to terminate the input of the PA.

Only the load and line impedance to the load sets the SWR, you 
can never create SWR at the source end, unless the source 
generates strong harmonics.


73, Tom W8JI
w8ji@contesting.com

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