Mobile reception: RS mag-mount scanner antenna vs 2m/70cm ham antenna

Mobile reception: RS mag-mount scanner antenna vs 2m/70cm ham antenna

Post by TooManyRadi » Mon, 06 Mar 2000 04:00:00

Question for the group:

I have been using Radio Shack's $29.99 mag-mount for the past 10 years in my
mobile.  This antenna is well worth the money...it performs well and has
literally been from coast-to-coast, attatched to 5 different vehicles (so far.)

Recently, though, I've been thinking about replacing the RS antenna with
something that will give a little more signal...but what?  Dedicated mobile
scanner antennas with gain are nearly impossible to find these days.  What
about mobile ham antennas?  Specifically, the upper-end antennas from Comet and
Diamond.  These are about 5 feet long and advertise around 4.5 db gain on 2m
and 7db on 70cm.  My thinking is that one of these antennas would offer
superior performance on VHF-HI and UHF, due to it's being tuned to the adjacent
ham frequencies (2m + 144-148Mhz, 70cm = 420-450Mhz.)  Both Comet and Diamond
also offer a 6m/2m/70cm antenna as well.  Since 6m = 50-54Mhz, this would
presumably offer stellar performance on 46-49Mhz as well.

What do you think?  Would one of these antennas offer any noticeable increase
in reception over the RS mag mount that I am currently using.  If so, would it
be enough to justify the $150 that a Comet or Diamond ham antenna & mount
typically costs?  Also, what kind of reception on 800Mhz could I expect from
such an animal?  Better, worse, or the same as the RS antenna?

 
 
 

Mobile reception: RS mag-mount scanner antenna vs 2m/70cm ham antenna

Post by Jim » Wed, 08 Mar 2000 04:00:00




Quote:>Question for the group:

>I have been using Radio Shack's $29.99 mag-mount for the past 10 years in my
>mobile.  This antenna is well worth the money...it performs well and has
>literally been from coast-to-coast, attatched to 5 different vehicles (so far.)

>Recently, though, I've been thinking about replacing the RS antenna with
>something that will give a little more signal...but what?  Dedicated mobile
>scanner antennas with gain are nearly impossible to find these days.  What
>about mobile ham antennas?  Specifically, the upper-end antennas from Comet and
>Diamond.  These are about 5 feet long and advertise around 4.5 db gain on 2m
>and 7db on 70cm.  My thinking is that one of these antennas would offer
>superior performance on VHF-HI and UHF, due to it's being tuned to the adjacent
>ham frequencies (2m + 144-148Mhz, 70cm = 420-450Mhz.)  Both Comet and Diamond
>also offer a 6m/2m/70cm antenna as well.  Since 6m = 50-54Mhz, this would
>presumably offer stellar performance on 46-49Mhz as well.

>What do you think?  Would one of these antennas offer any noticeable increase
>in reception over the RS mag mount that I am currently using.  If so, would it
>be enough to justify the $150 that a Comet or Diamond ham antenna & mount
>typically costs?  Also, what kind of reception on 800Mhz could I expect from
>such an animal?  Better, worse, or the same as the RS antenna?

I cannot give you comparative info because I have no experience with
the RS antenna.  But, I have been using a 34 inch long Comet
144MHz/450MHz/900MHz antenna on several vehicles for approximately 10
years and it performs very well electrically and is mechanically
sturdy.

The 900MHz section served very well at 800 MHz when I had an analog
cellular phone.

Not being a lover of mag-mount antennas (for transmitting) I say pay
the money and drill the holes.  Good luck.

Jim
Jim