Any one good with VHFs? Won't transmit on high

[adamdavi3s]

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?

[geoffs]

Bad power connection/low battery

[Nos4r2]

Originally Posted by geoffs

Bad power connection/low battery

Yep. Had the same problem last year and it was a corroded fuse.

[al40]

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.

[Jon Brooks]

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

[adamdavi3s]

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!

[Cookee]

Originally Posted by adamdavi3s

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

[wavelength]

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 .

[chris123]

Originally Posted by wavelength

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

[al40]

Originally Posted by chris123

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!