maniago
Well Known Member
Its been well over 30yr since I messed with RF stuff, but now I find myself starting on the panel and buying used gear. So I'd like to bench the stuff as I build. If someone with the smarts could help me with the following questions....
1) 50ohm dummy loads for all comm radios (75ohm is only for flat wire TV ants right? Do we do that anymore?)
2) What freqs are we talking for com, nav, xpdr, gps etal?
3) Would something like this get the job done for the comm radios? https://www.rfparts.com/dummy-loads/dummy-load-25/50t-054-bncf.html
4) GPS and Nav antennas receive only/dont transmit so no need to hook up them up to test the box functions....unless I want to get a signal (?)
5) Transponders need a monster load.....but how much? 300W? Cost=ouch!
5a) Can I get away with a xpdr ant bolted thru a sheet of AL for the gnd plane, and if so, how big is good enough? 1ftsq?
5b) Do I gnd the gnd plane to the xpdr chassis or just let it float electrically if I go the 5a way?
Thanks for any help.
1) 50ohm dummy loads for all comm radios (75ohm is only for flat wire TV ants right? Do we do that anymore?)
2) What freqs are we talking for com, nav, xpdr, gps etal?
3) Would something like this get the job done for the comm radios? https://www.rfparts.com/dummy-loads/dummy-load-25/50t-054-bncf.html
4) GPS and Nav antennas receive only/dont transmit so no need to hook up them up to test the box functions....unless I want to get a signal (?)
5) Transponders need a monster load.....but how much? 300W? Cost=ouch!
5a) Can I get away with a xpdr ant bolted thru a sheet of AL for the gnd plane, and if so, how big is good enough? 1ftsq?
5b) Do I gnd the gnd plane to the xpdr chassis or just let it float electrically if I go the 5a way?
Thanks for any help.
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