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KG6BAJ > NWSGRP 25.09.09 03:46l 38 Lines 1052 Bytes #999 (0) @ WW
BID : 11906_N1OES
Read: GUEST
Subj: Lightning Arrestors Question
Path: DB0FHN<DB0MRW<DB0ERF<OK0NAG<OK0PPL<DB0RES<DK0WUE<7M3TJZ<ZL2BAU<N4JOA<
N9ZZK<KG6BAJ<KG6BAJ
Sent: 090924/1600Z @:KG6BAJ.#NCA.CA.USA.NOAM #:11906 [Grass Valley] InterGate $
** NEWSGROUP: rec.radio.amateur.antenna
** FROM : "Robert11" <rgsros@xnotme.invalid>
Hi,
Saw a picture somewhere of an in-line lightning protector for a HF radio
receive only antenna.
Coax style.
Apparently has the typical gas tube, and when activated shorts the center
conductor to the braid.
Was wondering a bit about this.
I seem to remember in the old days, there was always a third tap on these
sort of things that you ran a solid ground to, e.g., a water pipe.
Does merely shorting to the braid provide "good" protection ?
Any thoughts would be appreciated.
Also want to ask: what about voltage surges of a few hundred volts or so
induced on an antenna lead from a nearby lightning strike perhaps
.
The levels way below what would trip a gas tube I would imagine, but still
more than enough to ruin a front end of a receiver.
How does one protect against these without breaking the bank doing so ?
Thanks,
Bob
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