Will my 477mhz stainless steel whip antenna (not elevated feed) be able receive freqs from 403 though 470 with out damaging the radio? I'm only transmitting on 477mhz ATM. Would a wide band antenna do a better job on these freqs and should I start using an elevated feed set up. I am use a Tait TM8200.
Cheers Dom.
477 MHz antenna?
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Aussiescanners takes no responsibility for any modification undertaken, these are to be done at your own risk and should only be performed by those with good knowledge of radio and soldering.
Aussiescanners takes no responsibility for any modification undertaken, these are to be done at your own risk and should only be performed by those with good knowledge of radio and soldering.
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Re: 477 MHz antenna?
If you are only using it for receiving, it won't damage the radio, but it won't perform as well as an antenna intended for the specific frequency range.FTX03 wrote:Will my 477mhz stainless steel whip antenna (not elevated feed) be able receive freqs from 403 though 470 with out damaging the radio? I'm only transmitting on 477mhz ATM.
An antenna intended for the required frequency range will always do a better job, and height also helps.Would a wide band antenna do a better job on these freqs and should I start using an elevated feed set up. I am use a Tait TM8200.
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Comint
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Re: 477 MHz antenna?
Thanks. Do the elevated feed sections have freq ranges or is it Based on the antenna that's screwed to it?
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Re: 477 MHz antenna?
Yes they do. The RFI and Polar antennas come with the GI frequency you specify. They have different coloured bands at the base.FTX03 wrote:Thanks. Do the elevated feed sections have freq ranges or is it Based on the antenna that's screwed to it?
It's for a couple of reasons, the cable length going into the base has to be precisely cut, (outer braid and inner conductor length, to go into the top of the GI section to couple correctly. The internal capacitance is different for each band, they run normally around 20MHz wide. Have seen a 490MHz antenna work ok on a 450 GI but it's not recommended.
HTH.
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Re: 477 MHz antenna?
I see. What's the benifit of using an elevated feed opposed to a regular stainless whip on and base? (my current set up.)
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Re: 477 MHz antenna?
Dom, as Commit said if you are only receiving it will not damage the radio only transmiting at the lower freq's may damage it.
If you are worried about damage while transmitting just by a SWR metre and check the SWR for that antenna on all frequency's.
If you are worried about damage while transmitting just by a SWR metre and check the SWR for that antenna on all frequency's.
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Re: 477 MHz antenna?
The elevated feed was originally developed for use with Police UHF antennas to get the antenna clear of the rotating reflectors of the Red and Blue lights, as they caused havoc to the radiated signal..FTX03 wrote:I see. What's the benifit of using an elevated feed opposed to a regular stainless whip on and base? (my current set up.)
If you have no obstructions around your existing antenna, it won't make any difference.
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Comint
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Re: 477 MHz antenna?
Thank you mate.
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477 MHz antenna?
As already stated if Rx only you will be right I use a rfi elevated feed for extended Rx on my uniden UHF have done for years no issues
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VK3 XRI
South Eastern Communications
Radios-Communications- Pagers
facebook- https://www.facebook.com/pages/South-Ea ... 183?ref=hl
http://www.secomms.com.au
sales@secomms.com.au
0434720006