[1000mp] Sticking ant relays

[HA3LN]

Deal All,

I'm wondering whether if any of you faced this before.

I have a FT1000MP MkV Field with an AL-811 with 500W out.

On the cases when the radio switches back from TX to RX it sounds like the
MP's ant unit relay sticks and I can hear barely/nothing at all the 
band. The receiver comes back only after a certain amount of time or if 
I step the foot-switch again couple of times.
If I run barefoot 100W nothing similar happens. I don't have opto 
decoupled TX GND/relay switching, only directly connected with RCA's.

I suspect the RF comes back somehow or maybe the PA ant relay might be 
guilty.
Do you think is this the relay or the switching transistor on the ant 
unit board?
Any other ideas?


Thanks a lot in advance.

73!
Csaba  HA3LN
http://ha3ln.hu/