K3 hi SWR between radio and KPA500 on 160M only

[Elecraft mailing list]

It seems I developed a high SWR between the K3 and the KPA500 only on 160M.

 

I did test the output of the K3 on 160M into a dummy load and it's 1:1.

 

I then hooked the K3 back to the KPA 500 and repeated the hi SWR.

 

I didn't test all the band but I did test 80 and 40 and they are work fine
in STBY and OPER (KPA500) but on 160M I get a high SWR with both STBY and
OPER on the K3.

 

I testing was done into dummy load to confirm the problem.

 

Any help where to start in the KPA 500 would be great.

 

Thanks

 

73 Bill

 

 

 

Please use [hidden email] <mailto:[hidden email]>  as my primary account

 

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[Mike K2MK]

Hi Bill,

Is it possible that the K3 built-in antenna tuner is in the active position on 160 meters only. This could account for the problem and might still show a 1:1 SWR into a dummy load.

73,
Mike K2MK

Elecraft mailing list wrote

It seems I developed a high SWR between the K3 and the KPA500 only on 160M.

I did test the output of the K3 on 160M into a dummy load and it's 1:1.

I then hooked the K3 back to the KPA 500 and repeated the hi SWR.

I didn't test all the band but I did test 80 and 40 and they are work fine
in STBY and OPER (KPA500) but on 160M I get a high SWR with both STBY and
OPER on the K3.

I testing was done into dummy load to confirm the problem.

Any help where to start in the KPA 500 would be great.

Thanks
73 Bill