Static shock while connecting ground-wire to radio?

Discuss commercial and home made antennas.
JEL
Posts: 178
Joined: Wed Feb 07, 2018 2:08 am

Re: Static shock while connecting ground-wire to radio?

Post by JEL » Thu Mar 05, 2020 4:15 am

Thanks Hotpaw2 :)

I already have a ground-wire permanently connected to the shield of the antenna (And since it's a loop-antenna thus also automatically to the lead wire)

But I have ordered a galvanic isolator and also a surge-protector, which are to sit on the cable near the radio, so I'm currently waiting for those to arrive before doing more work with this antenna :)

Good advice with touching the cable to ground before connecting it.
I usually do the same with myself before handling electro-statically sensitive devices (By touching my finger to something 'ground' to dissipate static from my body)

KD7CAO
Posts: 16
Joined: Thu Feb 20, 2020 3:27 am

Re: Static shock while connecting ground-wire to radio?

Post by KD7CAO » Sun May 24, 2020 2:30 am

JEL wrote:
Thu Mar 05, 2020 4:15 am
Thanks Hotpaw2 :)

I already have a ground-wire permanently connected to the shield of the antenna (And since it's a loop-antenna thus also automatically to the lead wire)

But I have ordered a galvanic isolator and also a surge-protector, which are to sit on the cable near the radio, so I'm currently waiting for those to arrive before doing more work with this antenna :)

Good advice with touching the cable to ground before connecting it.
I usually do the same with myself before handling electro-statically sensitive devices (By touching my finger to something 'ground' to dissipate static from my body)
I would recommend you purchase a PolyPhaser (this is a brand name) the industry standard in RF protection. You can purchase them for a variety of frequencies and power limits (not that you need a high wattage for receive) and you can also get a DC Passing if you wanted to feed power on your feedline for an LNA for example. There are other brands that may work just as well for your needs. Good grounding for the PolyPhaser is also extremely important. If you want the best methods, read up on the Motorola R56 standards otherwise, the American Radio Relay League has a decent book too. I have the Kindle Version: https://www.amazon.com/dp/1625950659?ta ... th=1&psc=1

JEL
Posts: 178
Joined: Wed Feb 07, 2018 2:08 am

Re: Static shock while connecting ground-wire to radio?

Post by JEL » Mon Jun 15, 2020 10:23 pm

KD7CAO wrote:
Sun May 24, 2020 2:30 am
I would recommend you purchase a PolyPhaser (this is a brand name)
Thanks for the suggestion and sorry for the late reply :)

I have been running the galvanic isolator now for some time and it appears to kill everything below about 5 kHz.

I also bought a 'lightning-protector', which is advertised as protecting sat-TV receiver equipment during thunderstorms.
I'm not really sure what that does exactly though.

Only sad thing is I have a really hard time listening for 'whistlers' now, which is one thing I do attempt from time to time.
But rather keep the radio safe I guess :)

lostcowboy
Posts: 11
Joined: Fri Oct 09, 2020 12:23 pm

Re: Static shock while connecting ground-wire to radio?

Post by lostcowboy » Fri Oct 09, 2020 12:49 pm

Hi, coming to the party late, just joined. I am a bit concerned, that this may not be a static charge, but bad connections in your electrical box. It's been a long time since I went to Electronic school in the navy, but I am under the impression that the voltage between the neutral wire and ground should be zero! Sounds like that may not be true in your case. Here is some more info. https://www.esgroundingsolutions.com/ho ... ansformer/ and https://www.mikeholt.com/technical-grou ... 15-99).php

Post Reply