[Elecraft] T/R switching problem

[Jan]

I am having a problem with T/R switching in my K3.  The symptom is that, 
after I transmit, the receive signals are sometimes very attenuated.  
This problem has gotten worse.  At first, simply a quick tap on the PTT 
switch fixed everything, but now, at least on phone, I must make a brief 
additional transmission to get the receive to return.  Today, the 
problem got worse, and sometimes I have to really fuss with things to 
get receive back.  Here are some questions:

 1. Is there a T/R relay in the K3, and does this sound like it is
    sticking, at least to the extent that it does not make good contact
    on receive?
 2. Has anyone had the similar problem, and what was the solution?
 3. If it is a relay, can it be replaced easily, or is this a return to
    Elecraft situation?
 4. If it is simply a relay replacement, where is the relay located?

Thank you,

Jan, KX2A