[Elecraft] K2 RF board resistance check - RYCOM

[Charles Vollum]

>  ps -- although it doesn't seem to be part of my problem, I'm still
> curious about RYCOM.  It can't just float, and the 160 board can't be
> the source for it, but I still haven't found where it comes from.

This morning I had an idea on this -- maybe the relays are always 
operated in pairs, and the processor pulls down on one and up on the 
other, so that the coils operate in series?  It would make sense for 
the VCO/BPF/LPF relays which always need to be moved together, but I'm 
not so sure about K16 & K17, the attenuator and rf preamp relays...  It 
would make it possible to pull the relays in either direction, rather 
than having to toggle them (which is tough if you don't know their 
original state.)

> Can anyone direct me to the right part of the schematic?  I signal 
> index
> would be useful for this kind of stuff.

Thanks for the suggestions to search the manual PDF.  Why didn't I 
think if that?

Cheers,

Charles N7BPT
----
Charles Vollum
http://xsw.com/boojum -- Boojum, a trailerable offshore tug yacht