RST Engineering wrote:
I want to add another Nav radio w/GS to my plane. I can use the extra
Nav output from my existing coupler for the new Nav radio, but I need
an additional GS output for the new GS receiver.


Why in heaven's name do you want TWO glideslope receivers? Just like the
man with two watches who never really knows what time it is, you will never
really know which one is telling the truth.

Because your two-watch supposition is based on the fact that you'd have
no indication that one ILS system is non-functional. The incremental
cost to put a second GS in my plane was next to nothing. If the
Garmin GNS80 goes dead or the HSI it feeds whacks out, I still have
a relatively plane jane NAV/COM feeding a traditional CDI indicator.