Have a HW-7 that I am trying to put on the air. When it is plugged in RFC2 26 mH heats up. I have checked ZD1 and it has shorted. This is a 56-55 Zdiode. Can anyone help me with replacement information for the ZDiode. I am not at all familiar with what I can replace it with. Thanks, Kevin k8su at adelphia.net