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Go Back   SailNet Community > On Board > Gear & Maintenance > VHF radios.
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Thread: VHF radios. Reply to Thread
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Topic Review (Newest First)
02-26-2007 09:26 AM
k1vsk Didn't think of the speaker in the command mike Cam - you're right.

"a mic is like a speaker working in reverse" is true but only for the very old style carbon microphones and not for the contemporary electic type commonly used on boats.
02-26-2007 07:23 AM
trantor12020 a mic is like a speaker working in reverse. the magnet there is weak, would probably not affect the compass at the helm. the command should have both a speaker and mic built-in, or maybe the speaker/mic is same unit (dual role) since its a simplex system.
02-25-2007 09:59 PM
camaraderie Command mics have speakers in them. Probably won't deflect much but check before mounting.
02-25-2007 09:39 PM
k1vsk Why would a microphone have a magnet?
I don't think the mike in and of itself will have sufficient effect on the compass to be noticeable. The mike and wires should have no ferrous metal, however, if it has one of those metal discs on the back from which the mike hangs in a bracket, that might.
Regardless, simple enough to test before making a permanent install
02-25-2007 09:17 PM
Tartan34C
Quote:
Originally Posted by camaraderie
Yes...magnets inside the mic will cause compass deflection
I am not familiar with the command mike. What is a compass safe distance for that?
Thanks,
Robert Gainer
02-25-2007 09:08 PM
camaraderie Yes...magnets inside the mic will cause compass deflection
02-25-2007 02:37 PM
Ladyhawke2
VHF Radio

Thanks to the views expressed here, I settled on an ICOM 402 with a command mike that wires to the helm. Looks to be a great radio and the command mike will give me access without leaving the helm to go below. I just have one more question....while there is clear direction about having the radio itself well away from the compass ( 3.5 ft +)...is the same true for the command mike.
02-20-2007 01:19 PM
eherlihy This was buggin' me...
WestMarine VHF250 = Uniden MHS550
WestMarine VHF150 = Uniden MHS450
WestMarine VHF55 = ????
02-14-2007 03:34 PM
Freesail99 I suggested it's use in an energency situation. I also said that if you had the proper mmsi numbers you could call a friend. I never suggested that it be used freely.
02-14-2007 04:13 AM
Idiens
Quote:
Originally Posted by Freesail99
So your worring about waking people and not about a ship possibly running you down ?
There are two entirely separate issues here. One is the emergency situation, where obviously waking up the OOW is important. The other is the nuisance situation, where the OOW is distracted by a radio that keeps demanding attention when the transmission does not apply to him. In the days when SOLAS ships had to carry a full time radio operator, this was no problem. DSC was introduced to save the cost of the radio operator. Now the OOW has taken over that task. I read in navigation journals (e.g. RIN) that the alert tone has become a nuisance in crowded waters. If we yachties start using it for other than true emergencies, then IMO may change the rules and only direct MMSI calls and MayDay will set off the alert tone.
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