[Milsurplus] More TCS questions
Help - trapped in surplus store
[email protected]
Mon, 8 Dec 2003 12:18:06 -0500 (EST)
Ray there's different favorite methods but here's what I do. I've
thrown in a little EE for support.
Use minimum series L (antenna loading setting 40) and no parallel C
(switch off). Series a broadcast variable with the output terminal
& connect to dummy resistive load. The variable C makes right Z-sub-c to
tune out the link's Z-sub-l.
Now dip the final (plate) and adjust coupling knob & variable C on
each band for right power out.
The OUTPUT IMPEDANCE on a TCS wanders all over the map with frequency.
It ain't a ham-job meant to look @ 50 ohms everywhere. The things were
meant to run with short antennas having lotsa Z-sub-c & hence the series
L box when really, really big Z-sub-c compensation wanted.
Just do as above & at least most will be well w/o any other pieces.
And... same thing works with command sets & bypasses all need to "convert
final output." Wonder why CQ et. al. didn't think this thru in the 40s.
Marty