[NLRS] Modifying DirecTV feedhorns?

[Scott]

I'm in the process of modifying my feedhorn for 10 GHz.  I have it bored 
out to 0.750" and I plan to make the plug for the back end adjustable in 
and out.  About how far from the antenna probe should the plug be?  I 
think something like 1/4 wavelength?  That might be somewhere a bit over 
1/4" ???  Without proper test gear, what's the best way to tune the 
plug?  I would guess that having someone transmitting a carrier to me 
and then adjust for highest S-Meter reading?  Would this be a good way 
to insure a good match on transmit?  I don't have an SWR bridge for 10 
GHz...

Got the tuning tool for that tiny capacitor on the DEMI L.O. turned out 
on the lathe tonight.  Let me tell you, it's a bit hard for a complete 
lathe novice like me to turn the end of a 3/16" brass rod down to 0.050" 
and grind a blade on that for adjusting the piston in the capacitor 
without breaking it off (that happened on the first try -- must not have 
had the cutting tool bit exactly centered)...now I'm in the mood to 
finish up the rest of the 10 GHz transverter :)

-- 
Scott N0EDV
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