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Old 22 January 2008, 16:25   #1
Country: UK - England
Town: Gloucestershire
Boat name: Osprey
Make: Osprey Vipermax
Length: 5m +
Engine: E-tec 300 G2
Join Date: Dec 2006
Posts: 4,014
VHF Radio interference

I have just fitted a V Tronics Rib Raider aerial to my RIB after the old SILVA wip broke at the base.

The old Aerial seemed to work well and I always had good reception however I am a little uncertain about the new RibRaider.

When out on Sunday playing in the Severn with MattH we tried a few tests and I headed away from him transmitting and receiving test messages on ch75 on low power (1Watt) to test the signal. I noticed that before I lost site of him about half a mile away I was starting to find the reception quite poor with a lot of static. I then found that if I switched off the engine I got a much clearer signal.

I then tried Bristol VTS on ch12 again on 1W and they said they could hear me loud and clear and I could hear them quite well.

So whats the SP with engine interference does it only kick in with a weak signal.

Is it Matts radio that is at fault perhaps. He certainly did not recieve radio traffic when we were in the lock whilst I did, again he is using a RibRaider.

Chris is offline   Reply With Quote
Old 22 January 2008, 20:04   #2
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Could be all sorts of things - electronic equipment on board such as chart plotter etc but alternators can play havoc. It could be the new aerial is more sensative. And yes a weak signal is easily swamped.

codprawn is offline   Reply With Quote
Old 24 January 2008, 04:04   #3
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,614
'tis but a thought that if you swapped from one raider to a new one, I assume you used the same connector into the base? Is it worth removing it, cutting the wire back half an inch to get to the "clean" copper & making a fresh connection? I say that 'coz I guess if you broke the old raider, then there's every chance that water has got in via the top and started to corrode something.
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Old 24 January 2008, 08:46   #4
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Country: UK - England
Town: Far west!
Boat name: Vigilant
Make: Humber
Length: 6m +
Engine: 90hp
Join Date: Feb 2006
Posts: 505
Worth checking the engine earth as well.
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