"N0IMW" wrote in message
...
There is probably much
more to be said about best coupling for maximum gain.

Maximum Gain, that seems to be all people think about.

Max. Gain is not always a good thing.

Example which is better for 2 meter mobile a 1/4 wave 0 dB whip a 3 dB
5/8
wave or a 6 dB collinear ?

A true 6 dB collinear makes a very poor mobile antenna.
Unless your parked on level ground, then it works fine.

The 3 dB 5/8 wave works good if you are on fairly flat terrain.
But get into the mountains or use repeaters that are on
10,000 ft. + mountains like we have here in WY and Colorado.
A 0 dB 1/4 wave whip can some times work better.

People put a 3 dB gain mag mount on the back corner of the
finder, setting at a 30 degree angle and wonder why it don't work as well
as my
0 dB 1/4 wave mounted in the center of the roof of a van. (Mounted in a
hole
in the roof, not a mag mount.)

All I am saying is there is more to an antenna than Max gain.
What about bandwidth, pattern etc.

There, I feel better.

73 Al Lowe N0IMW
Arrow Antenna

Son, you forgot "loss".
When I drilled that hole in the middle of the roof of the brand new Durango,
I married that truck.
Then there are the two BIG holes, one in each rear quarterpanel.
At 90,000 miles I'm about to do the FIRST brake job; It's an OK truck.
Anyone remember how Chrysler's still in business?
Anyway, here's my rig:

Comet 144/222/440 on an NMO mount topside center, small Hi-Q screwdriver 5'
above ground on the left rear quarterpanel.
Tarheel 4' screwdriver 4' above ground with a 4' whip on the right rear
quarter panel, toroidal transformer matched for 20 ohms.
For 160/80 I also have a BIG Hi-Q for the right side.
Rigs are Kenwood: 742 and 480HX.
No tuners.

73
H., NQ5H

(Richard Harrison) wrote in message ...
Art Unwin wrote:
"I do believe that this posting should put an end to this thread and I
thank you again for your input."

All the questions answered? Any topic is eventually tiresome, but not
everyone tires of it at the same time. Gain per unit length is likely
not a straight line at any particular frequency. There is probably much
more to be said about best coupling for maximum gain.

There was an article by Joe Reisert, W1JR in the December 1986 issue of
"Ham Radio" about a 28-element, 21-foot boom, 432 MHz (about 70 cm WL)
Yagi Joe built. The gain was about 19 dBi, or about 0.9 dB per foot at
432 MHz.

The pattern shown and gain are said to come from MININEC.

Best regards, Richard Harrison, KB5WZI



Hi Richard
Unfortunatly shortly after making his last post Art was
rushed to hospital and underwent emergency surgery to remove a
miss-behaving gall bladder.
At the time of writing I have been informed he is recovering and
hopes to be home in about a week or so.

Regards Derek unwin

On 30 Oct 2004 03:29:59 -0700, (Derek
Unwin) wrote:

At the time of writing I have been informed he is recovering and
hopes to be home in about a week or so.

Regards Derek unwin

Hi Derek,

I hope all goes well without complications for your father.

73's
Richard Clark, KB7QHC

Hi Richard
Unfortunatly shortly after making his last post Art was
rushed to hospital and underwent emergency surgery to remove a
miss-behaving gall bladder.
At the time of writing I have been informed he is recovering and
hopes to be home in about a week or so.

Regards Derek unwin





Hope all goes well and he is back to antenna stuff soon, wishing speedy
recovery.

While speaking of gall bladder, my XYL had bad attack of gall stones, instead
of going for operation we dissolved the stones with apple juice/lemon jucie/oil
tretment and avoided the knife. Worth looking into it and do it as preventive
measure from time to time. Info is on Internet pages under alternative
medicine.

GL Yuri, K3BU.us