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VHF in house.

Old 01-26-2007, 06:52 AM
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Default VHF in house.

Without getting into legality issues, and assuming this question is for a waterside marina or the sort, what is needed to install a basic fixed mounted VHF in the house?

I am thinking a good antenna on the roof for one. What about wiring? accessories? AC power?

Any help for a newbie would be appreciated; I'd like to do this as a DIY project.
Old 01-26-2007, 07:03 AM
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Default RE: VHF in house.

A good antenna, a good VHF and a 12 volt power supply. When I lived on the water I had one with the antenna at the peak( three story)and the range was great. I didn't use it much but it was great having it there in case of an emergency where the admiral could get me. Justthe occasion never did come up. I could also listen to the fishing chatter on the bay. Yes, I knew the legalities but I'd rather she could get me and worry about the law later. Now a cell phone will do.
Old 01-26-2007, 09:03 AM
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Default RE: VHF in house.

If you install one, make sure the 12V power supply can provide at least 7 amps of current.

Most VHF's draw nearly that much when keyed in the 25watt mode.



Old 01-26-2007, 09:50 AM
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Default Re: VHF in house.

http://www.mfjenterprises.com/produc...rodid=MFJ-4312

OR, a car battery with a solar trickle charger will also work well
Old 01-26-2007, 10:08 AM
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Default Re: VHF in house.

t3rockhall - 1/26/2007 9:50 AM

http://www.mfjenterprises.com/produc...rodid=MFJ-4312

OR, a car battery with a solar trickle charger will also work well
Actually the cheapest 12V supply would be a lawn/garden tractor battery from Wal Mart (God of all places ! ) About $20.00

Just charge it on occasion.
Old 01-26-2007, 10:13 AM
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Default Re: VHF in house.

so. these are not electronics that can be run off of ac? thanks for the responses...

Mudrunner, you have my needs pegged.


edit: trockhall.... the link you provided is a product that plugs into the wall AC outlet, and you power the VHF from that?
Old 01-26-2007, 11:22 AM
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Default Re: VHF in house.

parkersal - 1/26/2007 10:13 AM
edit: trockhall.... the link you provided is a product that plugs into the wall AC outlet, and you power the VHF from that?
It is called a REGULATED DC POWER SUPPLY. 110 AC in, 12V DC out. It must be "regulated" to smooth out and filter the DC.

A plain old car battery charger runs off 110 AC, and puts out 12 DC, but it is NOT regulated and should never be used for this purpose.

There are several types of regulated power supplies made. Radio Shack sells some, but I would stick with the better ones available at ham radio retailers. The ones I use are ASTRON http://www.astroncorp.com/

"Switching" power supplies are quite popular these days; they are much lighter than conventional supplies. I have no experience with switching power supplies, though.
Old 01-26-2007, 11:26 AM
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Default RE: VHF in house.

A word of caution – I too installed VHF in my house with the idea that the admiral could contact me if needed.

All seemed to be going well until she ended our first VHF communication the same way she ended our phone calls – with the words “I love you”. Instantaneously the VHF channel was overwhelmed as every captain and his goat got on the radio to give me sh*t. “oh I love you too” blah blah blah.

Needless to say, the admiral is now banned from the VHF for life.
Old 01-26-2007, 12:59 PM
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Default Re: VHF in house.

What legal issues are you guys talking about???

CMP
Old 01-26-2007, 01:24 PM
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Default Re: VHF in house.

It's illegal to transmit on marine channels from shore without specific licensing (marinas, radio repair shops, etc). You can listen all you want ...
Old 01-26-2007, 09:14 PM
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Default Re: VHF in house.

Curmudgeon - 1/26/2007 1:24 PM

It's illegal to transmit on marine channels from shore without specific licensing (marinas, radio repair shops, etc). You can listen all you want ...
That sucks. I was going to let my father take my handheld out on the pier with him when he's kingfishing so he could cuss at the boats cutting to close to the end of the pier. Of course if he's on the end of the pier, maybe he's on the water?

Ray
Old 01-26-2007, 09:31 PM
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Default Re: VHF in house.

rhartjr - 1/26/2007 10:14 PM

Curmudgeon - 1/26/2007 1:24 PM

It's illegal to transmit on marine channels from shore without specific licensing (marinas, radio repair shops, etc). You can listen all you want ...
That sucks. I was going to let my father take my handheld out on the pier with him when he's kingfishing so he could cuss at the boats cutting to close to the end of the pier. Of course if he's on the end of the pier, maybe he's on the water?

Ray
From FCC Maritime Mobile Service regs:

MAY I USE MY HAND-HELD MARINE VHF RADIO ON LAND?

You must have a special license, called a marine utility station license, to operate a hand-held marine radio from land. ... You may apply for this license by filing FCC Form 601 with the FCC. To be eligible for a marine utility station license, you must generally provide some sort of service to ships or have control over a bridge or waterway. ...The station operates under the rules applicable to ship stations when the unit is aboard a ship, and under the rules applicable to private coast stations when the unit is on land.

...If the FCC finds that you have willfully or repeatedly violated the Communications Act or the rules, your authorization to use the radio may be revoked and you may be fined or sent to prison.



Good luck.

Old 01-26-2007, 09:38 PM
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Default Re: VHF in house.

LOL-yep, I'm gonna go right out and get me one of them thar special licenses for my home based vhf! Fark the gubmint-let 'em find mine!!!

CMP
Old 01-26-2007, 09:48 PM
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Default Re: VHF in house.




Old 01-27-2007, 09:02 AM
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Default RE: VHF in house.

parkersal - 1/26/2007 5:52 AM

Without getting into legality issues, and assuming this question is for a waterside marina or the sort, what is needed to install a basic fixed mounted VHF in the house?

I am thinking a good antenna on the roof for one. What about wiring? accessories? AC power?

Any help for a newbie would be appreciated; I'd like to do this as a DIY project.
Knowing that this is illegal, why would you want to know how to do it? A science project, perhaps?
Old 01-27-2007, 09:06 AM
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Default Re: VHF in house.

rhartjr - 1/26/2007 8:14 PM
. ....... Of course if he's on the end of the pier, maybe he's on the water?
Nope, he has to be in a boat. The boat can be tied to the pier though.
Old 01-27-2007, 09:09 AM
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Default Re: VHF in house.

CMP - 1/26/2007 8:38 PM

.................... Fark the gubmint-let 'em find mine!!!
Yep, I think I'll go out and rob the local convinience store tonight. Fark the gubmint!
Old 01-27-2007, 09:21 AM
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Default RE: VHF in house.

Sal,


There are technical and regulatory considerations involved in operating a Marine Radio Service shore station.

TECHNICAL

Most VHF Marine Band Radio transceivers are configured for powering from 13.2-volts DC. To operate them from 120-volts AC you need a regulated power supply which can convert AC to DC. A typical radio will draw about 7 to 10 amperes of current. The least expensive way to provide this may be to use a small lead-acid 12-volt battery with a small maintainer-type charger that operates from 120-volt AC.

On small recreational boats the distance between the antenna and the transmitter is typically less than 10 feet. The loss in the transmission line is not great because the distance is so short, but in a shore installation the transmission line length will typically be greater. The loss in the transmission line will become excessive unless a transmission line with less attenuation is used. Typically a shore installation will use 1/2-inch transmission line.

REGULATORY

In the United States the regulations allow for most recreational boats to use an unlicensed transmitter, but shore stations need to be licensed. However, very infrequent and occasional use of low power transmitters on shore probably occurs without too much notice. I would not plan to install an elaborate station and make routine calls without a license.

The FCC has very good radio direction finding facilities and there is no doubt they can locate a clandestine or unlicensed transmitter when they want to. There have been several high profile prosecutions of clandestine transmitters who were making false distress calls in the Marine Radio Service. These people are paying huge fines and going to prison.

The VHF Marine Radio Service is not a broadcast service. There are no regulations which prohibit listening to VHF Marine Radio transmissions which are not directed at your station, however there are general regulations which make all non-broadcast radio transmissions private. If you happen overhear a private radio transmission not directed at your station on a Marine Band VHF radio, you are required to not disclose the content of that transmission to others.

In general the Marine Radio Service is not to be used for one-way or broadcast transmissions by ships except for notices of safety, urgent, or emergency messages. So it would not be proper for you to make one-way transmissions to someone you suspected was listening on shore. For example, it is likely improper for a recreational boat to make a transmission like "Hello Mary Lou--I will be returning to the dock in 20 minutes" when Mary Lou is not another vessel or a licensed shore station, but rather just someone assumed to be listening on shore.

If you want a casual and legal personal radio for communications, you might look into the Family Radio Service (FRS) or the General Mobile Radio Service (GMRS). The Marine Radio Service likely does not provide what you are looking for.

More information on GMRS at

http://wireless.fcc.gov/services/ind...general_mobile

All that said, if you take a 1-watt handheld off the boat and onto the dock to help with maneuvering the boat, the FCC is not going to prosecute you. And if you set your radio to scan and "read the mail" all day long on popular channels, you probably will not be in danger of going to jail, either.

On the other hand, if you set up a 25-watt station at your house and made a lot of calls between house and boat, you would probably attract enough attention that it could lead to notice of violation from the FCC.
Old 01-27-2007, 10:26 AM
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Default Re: VHF in house.

Or, Jim, encourage them to get ham tickets. It sure ain't very hard these days. The extra range afforded by repeaters is great!
Old 01-27-2007, 10:57 AM
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Default Re: VHF in house.

The regulated power DC power supply from Radio Shack works great. Not that I know or would do anything illegal!

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