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 1/2 wave Silver Rod, static build up and lightning

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Javelin Jim
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New Member



Call Sign : 26-CT-3427
Posts : 14
Times Thanked : 1
Join date : 2020-04-05
QTH or Location : Ashford, Kent
Equipment Used : Intek H520 Plus using an Albrecht CL27 TNC Rubber Duck (Not ideal

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PostSubject: 1/2 wave Silver Rod, static build up and lightning   1/2 wave Silver Rod, static build up and lightning Icon_minitimeSun Apr 12, 2020 11:34 am

Hi,
I’ve taken the plunge to get back into CB.
I’ve gone for my old basics to start with.
Initially, I’m going to mount a 1/2 wave Silver Rod on a six foot pole in the garden about 30m from the transceiver.
Until I find the best location for the antenna, I’m adopting the
“Poke the six foot pole through a heavy outside pub table with a cast iron umbrella stand at the bottom to secure it.
I’m thinking of the dangers of close lightning strikes and static build up.
I always disconnected my old sets from the antennas when not in use.
Would it be any help to attach an earthing rod to the base/bracket of the antenna or would I be actually “inviting” lighting to say “oooh, a nice pointy thing attached to earth”?
What do you guys think?
Cheers,
Jim
26 CT 3427
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Northern Crusader
Major contributor
Major contributor



Call Sign : M0GVZ / 26CT1760
Posts : 489
Times Thanked : 32
Join date : 2019-11-13
QTH or Location : IO94SA
Equipment Used : Icom 7300, TS480, President McKinley, Albrecht AE6110, CRT Mike
Age : 52

1/2 wave Silver Rod, static build up and lightning Empty
PostSubject: Re: 1/2 wave Silver Rod, static build up and lightning   1/2 wave Silver Rod, static build up and lightning Icon_minitimeSun Apr 12, 2020 4:14 pm

Don't think I'd be overly concerned here in the UK. If you get a direct strike it wouldn't matter a toss because there's not enough metal in the antenna or the pole not to get blown to bits in almost an instant. If you're doing proper lightning protection it needs to be far more substantial than the bit of 6mm or 10mm earth wire into a thin ground rod many people think sufficies. Towers use wide and thick copper straps.
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Javelin Jim
New Member
New Member



Call Sign : 26-CT-3427
Posts : 14
Times Thanked : 1
Join date : 2020-04-05
QTH or Location : Ashford, Kent
Equipment Used : Intek H520 Plus using an Albrecht CL27 TNC Rubber Duck (Not ideal

1/2 wave Silver Rod, static build up and lightning Empty
PostSubject: Re: 1/2 wave Silver Rod, static build up and lightning   1/2 wave Silver Rod, static build up and lightning Icon_minitimeSun Apr 12, 2020 5:22 pm

Thanks Northern Crusader,
I’ll keep it disconnected while I’m not using it as normal and keep a eye on the weather..!
Cheers
Jim
26 CT 1327
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26TC62
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26TC62


Call Sign : 26TC62, 26CT2817
Posts : 141
Times Thanked : 29
Join date : 2019-06-27
QTH or Location : Portsmouth
Equipment Used : Yaesu 891, 10m pole, wire 5/8, T2LT

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PostSubject: Re: 1/2 wave Silver Rod, static build up and lightning   1/2 wave Silver Rod, static build up and lightning Icon_minitimeSun Apr 12, 2020 6:16 pm

If there's DC continuity to earth from the radiator (which there is on many 1/2 waves, but not all), ordinary static will leak away without doing anything else. If there is a thunderstorm nearby I'd disconnect the power as well as the antenna, because near misses can put voltage spikes or induce current in wiring, but you'd be unlucky to have even a near miss.
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Javelin Jim
New Member
New Member



Call Sign : 26-CT-3427
Posts : 14
Times Thanked : 1
Join date : 2020-04-05
QTH or Location : Ashford, Kent
Equipment Used : Intek H520 Plus using an Albrecht CL27 TNC Rubber Duck (Not ideal

1/2 wave Silver Rod, static build up and lightning Empty
PostSubject: Re: 1/2 wave Silver Rod, static build up and lightning   1/2 wave Silver Rod, static build up and lightning Icon_minitimeSun Apr 12, 2020 6:36 pm

Years ago when I was a kid, I had an old valve driven HF receiver.
I stretched out a copper wire from my bedroom window to a wooden post on the shed.
The wire just went straight into the set into a terminal. There was an Earth terminal next to it but I didn’t earth it.
One night there was a close lighting strike, and I saw and heard an arc jumping from the antenna terminal to the earth terminal.
I presume it was earthed through the mains power supply.
That memory has always stayed with me.
Also, many years later, operating with a Silver Rod during a thunderstorm...heaven knows why? But I remember the the RX chat disappearing into the back of the box then a buzzing sound rising in tone until there was a close lightning strike, then the channel opened up.
I disconnected very quickly after that..!
Cheers
Jim
26 CT. 3427
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PostSubject: Re: 1/2 wave Silver Rod, static build up and lightning   1/2 wave Silver Rod, static build up and lightning Icon_minitime

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