[Elecraft] KAT500 ANT1 problem

[Jack Brindle]

Andy, my friend, you are forgetting something. The secondary toroid of the directional coupler has a direct path to ground. That means there is no straight-through DC path.

Rare that I catch Andy on something…

73,
Jack, W6FB


> On Jul 11, 2021, at 6:12 PM, Andy Durbin <a.durbin at msn.com> wrote:
> 
> KAT500 antenna selection drops to ANT-1 when there is no power on KAT500.  Also, with no power on KAT500, the Bypass relay defaults to bypass state.  There should be a simple DC path between input RF connector and ANT-1 RF connector if the KAT500 is not powered.
> 
> Pull the DC input plug and the coax connectors and measure DC resistance between XMTR and ANT-1.  No fancy PIN diode switching in KAT500, it's all relays.
> 
> 73,
> Andy, k3wyc
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