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Old 08 June 2009, 14:37   #1
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Any one good with VHFs? Won't transmit on high

Hi Guys,

I will add to this as required, only really just thought about putting it up here!

My VHF works a treat on low, will transmit and receive fine.

However, flick it to high... it still receives ok but when you try and transmit, it 'flashes' in that it seems like it can get power for a second, then drops, then gets power, then it drops.. when it drops it doesn't go off, it just goes off transmit and back to static. I thought it was an iffy connection in the mic transmit button but it works fine on low...

To high power drain?
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Old 08 June 2009, 15:09   #2
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Bad power connection/low battery
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Old 08 June 2009, 19:15   #3
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Bad power connection/low battery
Yep. Had the same problem last year and it was a corroded fuse.
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Old 09 June 2009, 18:31   #4
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or wires that are too thin at some point in the circuit - have seen this a few times. If you have an inline switch this is also a common culprit.
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Old 10 June 2009, 03:33   #5
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I am with Geoff, have seen this loads of times over the years.
Check and clean all the terminals on the way to the battery and def check the battery end.

Cheers
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Old 10 June 2009, 16:04   #6
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Hmm yeah it is probably the switch. I'll try taking a feed straight from the battery and seeing if it plays ball!

Thanks for the advice!
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Old 12 June 2009, 04:16   #7
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Hmm yeah it is probably the switch. I'll try taking a feed straight from the battery and seeing if it plays ball!

Thanks for the advice!
Bring it up to Churchstow and I'll have a look if you still have problems - 07836 268747
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Old 12 June 2009, 09:53   #8
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ok this is probably a complete red herring but.....
our icom wouldnt transmit on hi, always went straight down to lo when the PTT switch was pressed. It went in to local guy to have a look at and no fault was found (couldnt send it to Icom as the set had come back from the states with us - tut tut!). In the end and at the local guy's suggestion we changed the co-ax (orrible cheap stuff with an outer wrap of bum fluff) which was routed very close by the set, & never had another problem with it. So it might be worthwhile trying a different route for the co-ax just to try it. OK the electronic whizz kids may say its cobblers -but it worked for me .
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Old 12 June 2009, 13:32   #9
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OK the electronic whizz kids may say its cobblers -but it worked for me .
I don't think it is cobblers at all - I was going to say something similar - some VHFs drop the power down if they do not see the correct aerial load.

Cheers

Chris
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Old 12 June 2009, 19:06   #10
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I don't think it is cobblers at all - I was going to say something similar - some VHFs drop the power down if they do not see the correct aerial load.

Cheers

Chris
That's a neat feature - saves the set getting fried!
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