[Elecraft] K3: 160m SWR issue

[hb9ari]

Ok, Brian!
No other idea
Good luck for solving this problem!
73, Rudolf

Brian Machesney wrote:
> Good question, Rudolf, but no the ATU is not engaged.
>
> On Tue, Nov 3, 2009 at 2:56 PM, hb9ari <hb9ari at bluewin.ch 
> <mailto:hb9ari at bluewin.ch>> wrote:
>
>     Hi Brian,
>
>     Just an "idiot" question: are you using the K3 ATU?
>
>     73, Rudolf HB9ARI
>
>     Don Wilhelm wrote:
>     > 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?
>     >>
>     >>
>     >>
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> -- 
> 73 -- Brian -- K1LI