UHF not working when go over 40klm
Submitted: Friday, Jun 10, 2011 at 21:17
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Mick1234
Hi all we are traveling at the moment and our we can't use the mike on our uhf
we go over 40klm we still hear people but can't talk back .
Reply By: The Rambler( W.A.) - Friday, Jun 10, 2011 at 22:01
Friday, Jun 10, 2011 at 22:01
Ithink you normally can recieve further than you can transmit and 40km for uhf is above average.
AnswerID:
457025
Follow Up By: River Swaggie - Friday, Jun 10, 2011 at 22:14
Friday, Jun 10, 2011 at 22:14
It can also be read that if he travels (speedo) over 40kms he has trouble with the mike.....lol
FollowupID:
730141
Follow Up By: garrycol - Friday, Jun 10, 2011 at 22:35
Friday, Jun 10, 2011 at 22:35
40km is distance, 40 kph is speed so the OP was talking about distance.
FollowupID:
730143
Reply By: wizzer73 - Friday, Jun 10, 2011 at 22:18
Friday, Jun 10, 2011 at 22:18
does that happen on all channels? Sounds like you may be using a channel between 31 and 39. Those are repeater channels only.
Generally a 5W radio is only good upto 10-15km.
wizzer
AnswerID:
457026
Reply By: Mick1234 - Friday, Jun 10, 2011 at 22:38
Friday, Jun 10, 2011 at 22:38
Yes I ment to say that when I travel over 40klm/hr my mike cuts out. Gotta love big fingers and little keyboards
AnswerID:
457029
Reply By: pmk03 - Friday, Jun 10, 2011 at 22:38
Friday, Jun 10, 2011 at 22:38
G'Day Mick,
Sounds like you might have an intermittent bad connection at the antenna. As you speed up & the antenna bends a little it's probably either breaking the connection or shorting it. I would get it checked & not transmit untill you do, as this may damage the output stage of your transmitter. You will still be able to hear close signals with this problem.
PMK
AnswerID:
457030
Follow Up By: Whirlwinder - Saturday, Jun 11, 2011 at 09:49
Saturday, Jun 11, 2011 at 09:49
Mick,
I had the same thought. Can you borrow a magnetic based antenna and substitute for yours?
Ian
FollowupID:
730177
Follow Up By: vk1dx - Saturday, Jun 11, 2011 at 11:04
Saturday, Jun 11, 2011 at 11:04
Spot on Mick.
If he was in
Canberra I have a couple of magnetic bases that we could try. I am not a member so I cannot see his profile.
Phil
FollowupID:
730185
Follow Up By: JOHN A7 - Sunday, Jun 12, 2011 at 04:33
Sunday, Jun 12, 2011 at 04:33
Mate I have used these on my machines and 4x4 for years and have had trouble also as in yesterday.After checking out aerial for cracks or breaks I ended up loosening the base and then giving it a bit of a grounding on the base to re-earth it and she's right again.This is a common problem with two ways.
FollowupID:
730262
Reply By: Member - David Will (VIC) - Saturday, Jun 11, 2011 at 20:40
Saturday, Jun 11, 2011 at 20:40
Hi Mick 1234,
I would
check the connection of the aerial on the back of the UHF and make sure that this is tight.
David
AnswerID:
457107
Reply By: Mick1234 - Monday, Jun 13, 2011 at 14:50
Monday, Jun 13, 2011 at 14:50
Thanks to all for your replies. I am at a van park in
Alice springs and someone said that they haven't cut down the antenna when I remove the cap off the top it hasn't been cut so I might wait till tomorrow and take it to get it checked.
AnswerID:
457278
Reply By: Member - Boobook - Monday, Jun 13, 2011 at 17:10
Monday, Jun 13, 2011 at 17:10
Or your antenna is a high gain wire type that bends at speed. That cuases issues at speed.
AnswerID:
457292
Follow Up By: Member - Ed C (QLD) - Monday, Jun 13, 2011 at 19:54
Monday, Jun 13, 2011 at 19:54
Especially if used with an "elevated feed" antenna base...
They get out of phase, or something like that, so I'm told....
:)
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Follow Up By: Nomadic Navara - Tuesday, Jun 14, 2011 at 14:58
Tuesday, Jun 14, 2011 at 14:58
It does not matter much whether they are of the elevated feed type or not. When a very high gain type leans back they tend to transmit up into the sky in front of you and into the ground behind you. You can also get into that sort of trouble when negotiating creek crossings with any high gain antenna.
FollowupID:
730548