[Elecraft] ARR P50VDG Problems

[Chad Wasinger]

Hi Group,

Just recently hooked a Advanced Receiver Research P50VDG 6 meter preamp to my primary K3/10. Right off the bat I heard a internal relay start chattering with the preamp on and RX ANT setting engage (of course this is all in receive mode). Turned everything off to re-evaluate connections and setup correct. I then put the K3 into attenuation mode to eliminate some of the gain, no luck. 

Consulted with some fellow hams and Elecraft, Elecraft thought the 24 dB of gain might be too much and causing an overload on the front end (and the relay chatter). To make a long story short, I tried the suggestions and still having the same issue. So I took the P50VDG to my secondary K3/10, works like a champ and as I would expect. Now I’m wondering what is different about my primary K3. 

Short video of the noise which seems to be produced by the relay chatter: https://vimeo.com/63535627

Anyone experience this or have some suggestions? My primary K3/10 is at my remote station using the K3/0, my secondary is at home and backup. 

Chad
N0YK