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Quote:especially the 'transformer' with ground wire going to a 'standpipe'
Coax was not in wide use at the time of the creation of this antenna kit. So twisted pair was the receiving transmission line of the day. If the wire size and insulation thickness is like what was common power cord of the era, the nominal impedance would be 72 ohms. This is an ideal match for a dipole, however, such a dipole is good only at resonance and not so good off resonance. Off resonance the feed-point impedance rises. Twisted pair is tolerable to this off resonance much more than coax. The twisted nature cancels external noises and metal objects in near proximity but should not be against such conductors like metal siding or stucco lath.
The antenna input device should be very interesting to see how broadband matching is used or even if matching need be accomplished, may be no more than a lightning protection device and a terminus for conductors to enter the building.
RCA also provided antenna kits, just as hard to find in new condition.
Thanks for providing the antenna data...
Chas
Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”
Messages In This Thread
RE: BCB Antenna Ideas - by Chas - 08-01-2022, 01:18 PM
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