Brian, Is the higher reflected power indicated on the K3 or is it the reading on a meter in the line between the amp and the antenna?
If it is read on an external meter -- Is there any possibility that something is arcing over at high power - check your antenna system for that condition. If the indication is on the K3, then the problem is in the input circuit for the amp (giving a non-50 ohm resistive load to the K3). 73, Don W3FPR Brian Machesney wrote: > I'm feeding a "double L" antenna on 160m (visualize a vertical dipole with > the top and bottom legs bent to form something like a capital "C" and fed in > the middle of the vertical leg). The SWR bridge on the K3 shows 1:1 SWR, but > when I fire up my Alpha 91B, I see significant reflected power. > > I recently saw a post on the topband reflector from another K3 owner whose > 160m output power is being reduced from 100W to 50W by the K3 even though > the SWR reads 1:1 on the K3's internal SWR bridge. > > Has anyone else seen this or have an explanation for it? > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
