[Elecraft] K3 SWR Accuracy - reprise

Eric Swartz - WA6HHQ, Elecraft eric at elecraft.com
Wed Nov 4 13:46:56 EST 2009


Try using a double male connector to put the two SWR sensors right next 
to each other and repeat the measurement.

At the higher freq's, even 2 ft of coax can change the indicated SWR, 
especially when the actual SWR is 1.9:1 like yours. I regularly see this 
when driving an amplifier with a non 1:1 SWR with any of my rigs.

73, Eric


Stewart wrote:
> 'bout 2 feet.
>
> 73
> Stewart 
> On Wed, 04 Nov 2009 09:53:25 -0800, Eric Swartz - WA6HHQ, Elecraft wrote:
>   
>> How long is the coax between the LP100 sensor and the K3? This can have
>> a significant impedance transformation impact as you go to higher
>> frequencies, leading to a different indicated SWR at each end.
>>     


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