[Elecraft] KPA500 LPF T/R switch rework

[Don Field]

I wonder whether anyone on here can answer the following query from my
friend Mike G3WPH please (he's not on this reflector but I'll QSP any
replies):

*I’m installing Elecraft parts kit E850607 into a KPA500 for a friend. All
went well until I reached instruction 3 which says ‘Verify that R3 is a
Zener Diode Elecraft part E560074. If it is not remove and replace with the
provided diode’ Unfortunately the instructions have no information about
the zener orientation and I don’t have a circuit diagram.  I’ve verified R3
is a 100k resistor.*



*I’m guessing that others have already come across this problem and can
help. I can’t find any information on the web and not being a Elecraft user
don’t have access to any of their mailing lists.*



*Thanks for any help,*

*Mike /G3WPH*


73 Don G3XTT