[Elecraft] KPA-1500 Power Output Variation

[Jim McCook]

Antenna is 2 el. delta.  Uses 1/4 wave 70 ohm matching section. 
Described in ON4UN's Low Band DXing.  Used for 38 years with various 
tube amplifiers and no tuners.  All coax has been replaced as recently 
as 10 years ago.  SWR measurements always similar.  Power output with 
tube amps does not vary visibly on a Bird WM.  Same situation currently 
with a tube amp substituted.  Feedline from matching section about 50 
ft.  I know how to match antennas.:-) I have seen the usual reactance 
measurement on each side of design frequency of 7.025.  The built in 
tuner is the one I was referencing.  The KPA-1500 comes with one.

Jim