K3S RX antenna switching questions

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K3S RX antenna switching questions

Elecraft mailing list
Here's the setup : 3 month old K3S. Full wave 80 mtr RX loop. Closest point to TX antenna is around 200 ft. Over 50 watts I hear relays clicking and stations have a hard time breaking in even using QRQ plus. I assume the RX antenna is not switching fast enough and I'm getting  milliseconds of high RF into the front end and protection relays are kicking in??? 
Will increasing TX delay help this? If so, how much can I increase it from the factory setting of 008 before the keying gets choppy running 50 to 60 wpm? Are there other settings that would affect this? I also run an Acom 2000A from time to time, which has pin diode T/R switching and, according to reports, does QSK perfectly at those speeds. I don't want to mess that up either.
Thanks,Steve, WF3T

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Re: K3S RX antenna switching questions

Don Wilhelm
Steve,

I suspect that increasing the TX Delay will *not* fix that problem.
Since at greater than 50 watts, you hear relays clicking indicates that
the K3S COR is being activated.
The solution is to either move your RX antenna further from the TX
antenna or use some device that disconnects or grounds the RX antenna
while transmitting.

73,
Don W3FPR

On 11/13/2017 7:26 PM, Steve Steltzer via Elecraft wrote:
> Here's the setup : 3 month old K3S. Full wave 80 mtr RX loop. Closest point to TX antenna is around 200 ft. Over 50 watts I hear relays clicking and stations have a hard time breaking in even using QRQ plus. I assume the RX antenna is not switching fast enough and I'm getting  milliseconds of high RF into the front end and protection relays are kicking in???
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