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Forum: Electrics and electronics

14 April 2012, 10:46

Replies: 91

vhf radio

Views: 12,866

Posted By Salty John

This occurs in certain atmospheric conditions -...

This occurs in certain atmospheric conditions - when there is a high pressure system in place and there is little wind. The radio signal gets trapped below a certain altitude, about 1000' if I...

Forum: Electrics and electronics

14 April 2012, 10:41

Replies: 91

vhf radio

Views: 12,866

Posted By Salty John

Yes. The digital signal actually has slightly...

Yes. The digital signal actually has slightly more range than the analog voice signal, about 15% or so.

Forum: Electrics and electronics

14 April 2012, 10:24

Replies: 91

vhf radio

Views: 12,866

Posted By Salty John

There's a phenomenon known as tropospheric...

There's a phenomenon known as tropospheric ducting that allows huge distances, but you can't rely on it. I think the record is about 600 miles!

Forum: Electrics and electronics

14 April 2012, 09:54

Replies: 91

vhf radio

Views: 12,866

Posted By Salty John

Range in nautical miles equals 1.4 times root of...

Range in nautical miles equals 1.4 times root of the height of the transmitting antenna plus the root of the height of the receiving antenna. Heights in feet.
If your antenna is at 30' and the other...

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