[TenTec] Omni VI + hear when muted

[Dave Edwards]

On the air tonight with headphones on.

I noticed when the receiver is muted on CW semi break-in, I can still 
hear it. Way down in volume, almost not at all....but clearly still 
playing.

I don't think it has always been like this, or I would have noticed it.

So, whatever mutes the receiver on semi break-in has leakage (blow by).

Would that be a diode, or perhaps a leaky cap?

Anyone been there, done that?

Thanks in advance!

....Dave