800 stubby on AS III PS mic

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dxon2m
Posts: 948
Joined: Thu Mar 11, 2004 8:00 pm

800 stubby on AS III PS mic

Post by dxon2m »

This just came across my mind, did anyone tried to use a 800 Stubby antenna on a PS mic in UHF? I was thinking the length of the stubby is not that much shorter than the UHF and *might* work on UHF?

What do you think?
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Josh
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Joined: Mon Sep 03, 2001 4:00 pm
What radios do you own?: APX4K, XTL5K, NX5200, NX700HK

Post by Josh »

"not that much shorter" ????

The antenna is half the size of a UHF whip... which equates to 3 inches.
dxon2m
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Post by dxon2m »

Compared to the UHF stubby that is, sorry for not clarifying
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FireCpt809
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Post by FireCpt809 »

It might work for short distances, I doubt well. They are band specific for a reason. What RF is lost in tx will be reflected back into the radio and fry the RF deck/section over time.
thebigphish
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Post by thebigphish »

yeah it MIGHT work, but it won't work for any reasonable amount of time, and thne you will be replacing an RF deck as stated earlier. If you think about what you ary trying to accomplish, is it really worth using an antenna an inch or two shorter if you are gonna be sending in the PA / RF deck of your precious brick to be replaced? you CANNOT mix and match parts like that based on looks. They are band specific (some of them even more finicky - your narrow bandwidth ones) and cannot be exchanged for 'visual acceptedness).

i think it's a horrid idea.
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Tom in D.C.
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antennas...

Post by Tom in D.C. »

Two stubby antennas, both four inches long, one says it's for
450 mHz and other says it's for somewhere in the 800 mHz
range.

They look the same, but they're different inside, because of the
way the wire is spaced and coiled, and each antenna has been measured and
made to present the correct load at the desired resonant frequency to the
final amplifier of the radio. So, to put it in very rough terms, the
800 antenna has something like half as much metal in it as the
450 antenna, and even though they look the same from the
outside you can't interchange them without getting crappy
performance and quite possibly doing damage to the radio.
Tom in D.C.
In 1920, the U.S. Post Office Department ruled
that children may not be sent by parcel post.
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