Bobsprit wrote:
What is the height of your antenna mounting? What length is your
antenna?

45 or so. Whip is under two feet, I believe.

Okay, let's give the benefit of the doubt and assume a nominal height of 50
feet for each antenna...

What is the line of sight distance between the two antennae?


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

Wally wrote:
Bobsprit wrote:
What is the height of your antenna mounting? What length is your
antenna?

45 or so. Whip is under two feet, I believe.

Okay, let's give the benefit of the doubt and assume a nominal height
of 50 feet for each antenna...

What is the line of sight distance between the two antennae?

Sorry, *maximum* line of sight distance.


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

What is the line of sight distance between the two antennae?

I assume you're aware that VHF signals, while mainly line of sight, are capable
of greater range on occasion.

RB

Bobsprit wrote:
What is the line of sight distance between the two antennae?

I assume you're aware that VHF signals, while mainly line of sight,
are capable of greater range on occasion.

How much greater range, generally speaking?

Should I switch on my handheld and wait for you to hail me? Channel 9, Bob!
I'll be waiting!

No, really, how much greater range?


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

No, really, how much greater range?

To be honest, I was quite shocked to make the shout over 40 miles so clearly.
It's the best I've managed.

RB

Bobsprit wrote:
No, really, how much greater range?

To be honest, I was quite shocked to make the shout over 40 miles so
clearly. It's the best I've managed.

It does seem quite a long way - perhaps the conditions were particularly
favourable. What sort of range does your radio normally manage?


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

It does seem quite a long way - perhaps the conditions were particularly
favourable. What sort of range does your radio normally manage?

I can generally make the Oyster Bay area...around 12-15 miles, with ease. I had
steady contact with a friend beyond Huntington for a while, so I'd put average
range at 20-30 miles. Anything above that is a gift in this area.

RB

Bobsprit wrote:
It does seem quite a long way - perhaps the conditions were
particularly favourable. What sort of range does your radio normally
manage?

I can generally make the Oyster Bay area...around 12-15 miles, with
ease.

Uh-huh.


I had steady contact with a friend beyond Huntington for a
while, so I'd put average range at 20-30 miles.

You talk to people who have masts that are about 250 feet high?


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

ahahahaaahaahaahaahaaaa!!!!!

You can easily reach the space shuttle with that power and frequency. In
fact, you should be able to trip geosynchronous satellites too.

Buffoon you are!


"Bobsprit" wrote in message
...
No, really, how much greater range?

To be honest, I was quite shocked to make the shout over 40 miles so
clearly.
It's the best I've managed.

RB

Up to 800 miles. However, this is very extreme. The phenomena used is atmospheric
ducting, which is common when hot air overrides colder air - very common on the ocean in
the summer.

Also, "line of sight" is a bit misleading, since radio waves (and radar) refract a bit in
the atmosphere, to the horizon is a bit further.

The distance calculation is often given as "1.22 times the sum of the square roots of the
antenna heights." Assuming masts of 49 feet, this lead to a distance of 17 miles.
However, in open water its very common to hear chatter from 25 miles or further. Last
Friday while I was still south of Plymouth, I heard chatter from Salem Bay - maybe 50
miles away.

BTW, there is a theory that very long distance VHF propagation is correlated with
earthquake activity, so if you hear a pickup request from 500 miles away, prepare for a
tsunami!

-jeff


Wally wrote:
Bobsprit wrote:
What is the line of sight distance between the two antennae?

I assume you're aware that VHF signals, while mainly line of sight,
are capable of greater range on occasion.

How much greater range, generally speaking?

Should I switch on my handheld and wait for you to hail me? Channel
9, Bob! I'll be waiting!

No, really, how much greater range?