[Repeater-Builder] Channel Element

[Don]

Can anyone Please tell me if a Motorola VHF Spectra Tac receiver, uses
the same Channel Element as the Motorola VHF Micor Mobile, I think it
is the Same Receiver? 

Thanks Don KA9QJG







 
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[Repeater-Builder] MIL-SPEC Cable Listing

[Eric Lemmon]

The official Government listing of Military Specification coaxial cables
is at:



Scroll all the way to the bottom to find a link for the latest Qualified
Products List, QPL-17.

73, Eric Lemmon WB6FLY






 
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[Repeater-Builder] Antenna system 4 short term portable uhf repeater

[banjupb]

Hi my learned freinds.
I am interested if any body has tryed using 3db mobile whips mounted 
on a solid ground plain verticaly 180 degrees to each other and fed 
with separate coax to rx tx ports. I would use the top whip for tx and 
the lower for rx.This antenna would be mounted at the top of the mast 
so not to reflect the tx back into the rx antenna. The feeder would be 
double sheilded rg214 or similar.
Do you believe this would give me enough attenuation.
Thank you in advance for your help.
Brett
Down under.






 
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Re: [Repeater-Builder] GE suitcase programmer TQ2310

[Jim Knox]

Sorry for taking 2 month to reply, I have been busy... move the eprom to another spot, the bottom board will work the best, if it still dose not work, e-mail me at [EMAIL PROTECTED] I can give you a new eprom...   JK"R. K. Brumback" <[EMAIL PROTECTED]> wrote:





I purchased a GE suitcase programmer to use with Phoenix, Delta, and Ranger mobiles. It has a Panasonic handheld computer, I/O module with 6 slide in contact slots, a printer, EPROM and serial board, and a plug in memory module that holds the specific radio programming information. The memory module has about eight or nine open dual-in-line-pin sockets where the burned program chips may be plugged. 
The computer appears to be ok, but will not report the program storage module as a peripheral. It will report the printer, the EPROM burner pads and the ram of the computer. The program storage module has one program installed for the Phoenix. I have tried cleaning the contacts, placing the module in a different location, and staying at a Holiday Inn Express, but nothing so far. I suppose it is something in one of the chips. 
Is anyone out there familiar with this module, know of any problems in the past with it, or know a good place to start checking?  Thanks for any assistance.
Randy B.
 
--No virus found in this outgoing message.Checked by AVG Anti-Virus.Version: 7.0.323 / Virus Database: 267.6.2 - Release Date: 6/4/2005Jim Knox  N5NWC
		 Start your day with Yahoo! - make it your home page 













  




  
  
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Re: [Repeater-Builder] Batteries in Parallel

[Brett]

Hi guys.
I have been watching this backup battery discussion.
We use Eastpen Geltech batteries from the states they are the best batteries 
no weekly monthly maintenance. We check them for capacity every 6 months and 
thats it.
We use a product called Korode Kure on the battery terminals this keeps them 
clean and a good contact for many years. I have been using this for 30 
years. I also use it under HF mobile whip bases. If really stuck out in the 
bush with a empty tube of KK I have used copper kote a nut and bolt 
antiseaze.Oh by the way I have had a unsealed  battery bank go up so please 
venterlate the battery box to the outside world and keep a minimum 20 liter 
bottle of distiled water close at hand in the hut just in case. A 8hr + 
drive to medical help with acid burns is no fun. Cheers form down under.

- Original Message - 
From: "Mark A. Holman" <[EMAIL PROTECTED]>
To: 
Sent: Thursday, August 25, 2005 8:42 PM
Subject: Re: [Repeater-Builder] Batteries in Parallel


> As a sugguestion, if the wire has any green corrsion I would replace the
> stuff with new, especially if that wire got hot ,  from my experience.
> Mark AB8RU
>
> Tony VE6MVP wrote:
>
>>At 12:42 AM 2005-08-25 -0400, you wrote:
>>
>> > Those BCI -31's are good batteries, you can add extras on if
>> >you need to but you would have to go to a HD Truck Parts place or
>> >dealership to make up a special 2 or more battery cable,  your cable
>> >should be #6 or larger diameter ( #4 ,or #0 ) depends on how much
>> >current the system is drawing..
>>
>>All that was attached to those radios were 2 UHF linking radios wired back
>>to back.   So the most power they would use would be, guessing 20 amps,
>>when one radio is transmitting.   I have no idea what gauge of wire was
>>used.   They'd been there for at least five or ten years if not even
>>fifteen or twenty. I say 20 amps because 22 amps was what an 
>>electrical
>>place told me my mobile radio was consuming when we were stress testing 
>>the
>>alternator and battery in my car.
>>
>>And the other ham was far, far more experienced with all this than I am. 
>>I
>>was basically just the driver and gopher.  
>>
>>Tony
>>
>>
>>
>>
>>
>>
>>
>>
>>Yahoo! Groups Links
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
> 






 
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[Repeater-Builder] Re: Batteries in Parallel

[Coy Hilton]

No Jack, that is not an exaggeration Ive seen lead acid batteries 
blow off front quarter panels on cars and blow cabinet doors off 
from slight misuse. Hydrogen gas is nothing to play with. And as for 
fire hazzards, high currents can cause a fire pretty quick. Just put 
a piece of #22 bare wire across your car battery and watch it glow 
for a second before it burns open.


--- In Repeater-Builder@yahoogroups.com, Jack Bitzer <[EMAIL PROTECTED]> 
wrote:
> Seems like an exageration to me. Most likely outcome would be that 
the system would continue to overheat until both batteries went 
below 11 volts. Possibly the charger would blow a fuse or burn out. 
IF you call that a fire..ok. I have seen a battery explode when 
there was not much electrolyte left and a large amount of current 
was applied to it. I guess a spark between the plates ignited 
hydrogen generated from the gassing of the remaining electrolyte and 
as the caps were still on it blew a corner out of the case. 
> 
> Tony VE6MVP <[EMAIL PROTECTED]> wrote:At 01:12 AM 2005-08-24 +, you 
wrote:
> 
> >Can anyone relay any real life experiences with this?
> 
> To add to the many other comments I recently drove a ham to a 
remotish link 
> radio site and helped him a bit with replacing the batteries. They 
were 
> two auto batteries from totally different manufacturers. One was 
so hot 
> you could barely touch it. The other was room temperature. The 
battery 
> charger had gotten very hot as well. So much so it was 
uncomfortably warm 
> to the touch five minutes later. The ham, who has vastly more 
experience 
> than I do, stated there could've been a fire within days.
> 
> The two batteries were replaced with a highway truck sized battery 
which 
> was the same size as the two previous batteries put together.
> 
> Tony
> 
> 
> 
> 
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 
> 
> 
> 
> __
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com







 
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Re: [Repeater-Builder] whats is the differ between the VHF & UHF

[Mike Morris]

At
03:04 AM 8/25/05, Dimitris Velissaris wrote:

We
already tryied tests inside a big ship of our navy force.

Frequencies on vhf band
(140-170 MHz) and we had contact until 6 heavy and closed door on the
same horizontical level , after that nothing at all&.

Tranceivers was tk-2160 by
Kewnwood company with a power output 5 Watt.

 Best regards

Dimitris Velissaris
Technical Support
RadioCommunications Dpt.
ANCO S.A
44 Syngrou Ave
117 42 Athens - Greece
Tel : +0302109209217
Fax : +302109209345
URL : 
www.anco.gr
e-mail :
[EMAIL PROTECTED]
Intership communications are usually VHF, and in-ship UHF. 
In that case I'd use a UHF repeater with the duplexer antenna 
port feeding a Radiax system that goes throughout the ship.
The Radiax cable will "leak" RF everywhere and allow
inter-
compartment comms just fine.
Over the last 10 years a local company has installed over 
20 miles of Radiax in the basements of buildings, in parking 
garages, etc  You put a small antenna at the far end, 
and run it wherever you need signal.  In a building you put 
the radio in the basement and run Radiax up the elevator shaft 
to an antenna on the roof.  The building security folks can 
talk anywhere on their handhelds plus for a few blocks around 
the building  The owner can tell stories about building 
inspector after building inspector having to be educated that 
this is one cable that you CAN'T put inside conduit... no 
matter what It's made in plenum and regular type and you 
had better order the right type the first time...it's not 
cheap.
Mike
Mike Morris WA6ILQ wrote: 
At 12:56 PM 8/25/05, "Mark A.
Holman AB8RU" <[EMAIL PROTECTED]> wrote:

I would say alot of holes to cut with a torch in those Ships,

True.
and they may been designed to stop
water passage in 
case of a hull breach  
May   The walls are riveted steel and the doors are 
called "water tight" for a reason.
I would ask the upper brass
permission and discuss this 
with Engineers B4 Cutting a hole for that cable. 
I'd talk to a naval architect too.  But most ships are 
designed with extra space in the wiring ducts for a reason.
Mark  AB8RU
The only reason I mentioned it was in case he didn't 
know about radiax ... it's one solution for Faraday Cages.
I was on a tour of the SS Lane Victory 
(http://www.lanevictoryship.com),
supposedly the last 
operational WW2 Liberty ship, a while back and one 
of the other gentlemen on the tour was a radio engineer  
from one of the larger cruise ships (the Lane is docked 
right inbetween two sets of cruise ship berths in San 
Pedro harbor, just south of Los Angeles... if you are 
ever in the area it's worth the $4 for the tourit's used 
for a LOT of hollywood backdrops... most of the JAG 
scenes that were not ship-specific were filmed on 
board the Lane.)
Anyway, he told me then that in-ship comms are 
handled on UHF specifically to avoid the marine channels.
They have five repeaters on adjacent channels - the 60w 
transmitters feed a 5-port combiner and the receivers 
are fed by a multicoupler. One repeater is ship mechanical 
operations, a second is bridge personnel, and the 
other 3 are run as community repeaters with multiple 
tones and are used by the folks that handle the 
passengers.. food service,  housekeeping, etc.
All five repeaters feed out via one duplexer and the 
combined signals split down several runs of 1/2 inch
Radiax run through out the ship.  Anybody can be on 
any channel and be heard throughout the ship.
So Radiax _can_ be run through a ship without impairing 
the mechanical / physical structure... but it may have 
been included in the overall ships design at the beginning...  

I don't know, and have no way to contact him... the business 
card he gave me got left in the shirt pocket, got washed in 
the laundry and came out as wet confetti...
But the verbal block diagram I gave you above is not rocket 
science, and not beyond a good system designer assembling 
it with off-the-shelf components.
Mike WA6ILQ














  




  
  
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Re: [Repeater-Builder] whats is the differ between the VHF & UHF

[Mark A. Holman]

I would say alot of holes to cut with a torch in those Ships, and they
may been designed to stop water passage in case of a hull breach  I
would ask the upper brass permission and discuss this with Engineers B4
Cutting a hole for that cable. 

Mark  AB8RU

Mike Morris WA6ILQ wrote:
At 03:04 AM 8/25/05, you wrote:
  
  We
already tryied tests inside a big ship of our navy force.

Frequencies on vhf band
(140-170 MHz) and we had contact until 6 heavy and closed door on the
same horizontical level , after that nothing at all&.

Tranceivers was tk-2160
by
Kewnwood company with a power output 5 Watt.

 Best regards

Dimitris Velissaris

Technical Support

RadioCommunications Dpt.

ANCO S.A

44 Syngrou Ave

117 42 Athens - Greece

Tel : +0302109209217

Fax : +302109209345

URL :
www.anco.gr

e-mail :
[EMAIL PROTECTED]
  
Intership communications are usually VHF, and in-ship UHF. 
In that case I'd use a UHF repeater with the duplexer antenna 
port feeding a Radiax system that goes throughout the ship.
The Radiax cable will "leak" RF everywhere and allow
inter-
compartment comms just fine.
  
Over the last 10 years a local company has installed over 
20 miles of Radiax in the basements of buildings, in parking 
garages, etc  You put a small antenna at the far end, 
and run it wherever you need signal.  In a building you put 
the radio in the basement and run Radiax up the elevator shaft 
to an antenna on the roof.  The building security folks can 
talk anywhere on their handhelds plus for a few blocks around 
the building  The owner can tell stories about building 
inspector after building inspector having to be educated that 
this is one cable that you CAN'T put inside conduit... no 
matter what It's made in plenum and regular type and you 
had better order the right type the first time...it's not cheap.
  
Mike
  
















  




  
  
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RE: [Repeater-Builder] whats is the differ between the VHF & UHF

[Mike Morris WA6ILQ]

At 03:04 AM 8/25/05, you wrote:
We
already tryied tests inside a big ship of our navy force.

Frequencies on vhf band
(140-170 MHz) and we had contact until 6 heavy and closed door on the
same horizontical level , after that nothing at all&.

Tranceivers was tk-2160 by
Kewnwood company with a power output 5 Watt.

 Best regards

Dimitris Velissaris

Technical Support

RadioCommunications Dpt.

ANCO S.A

44 Syngrou Ave

117 42 Athens - Greece

Tel : +0302109209217

Fax : +302109209345

URL :
www.anco.gr

e-mail :
[EMAIL PROTECTED]
Intership communications are usually VHF, and in-ship UHF. 
In that case I'd use a UHF repeater with the duplexer antenna 
port feeding a Radiax system that goes throughout the ship.
The Radiax cable will "leak" RF everywhere and allow
inter-
compartment comms just fine.
Over the last 10 years a local company has installed over 
20 miles of Radiax in the basements of buildings, in parking 
garages, etc  You put a small antenna at the far end, 
and run it wherever you need signal.  In a building you put 
the radio in the basement and run Radiax up the elevator shaft 
to an antenna on the roof.  The building security folks can 
talk anywhere on their handhelds plus for a few blocks around 
the building  The owner can tell stories about building 
inspector after building inspector having to be educated that 
this is one cable that you CAN'T put inside conduit... no 
matter what It's made in plenum and regular type and you 
had better order the right type the first time...it's not 
cheap.
Mike














  




  
  
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[Repeater-Builder] many thanks

[Ted Bleiman K9MDM - MDM Radio]

i knew youse gize would have an answer
and i remember now having heard this explanation eons ago
but memory fades and waist lines increase...seems unfair.
thanks
again to all.  hope the mental excercise was worth it.
mdm








Ted Bleiman K9MDM
MDM Radio Ltd - 1629-B N. 31 st Ave Melrose Park, IL 60160 708.681.0300 fax 708.681.9800 web http://www.mdmradio.com - 
Check it now!!
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Re: [Repeater-Builder] Batteries in Parallel

[Jack Bitzer]

Seems like an exageration to me. Most likely outcome would be that the system would continue to overheat until both batteries went below 11 volts. Possibly the charger would blow a fuse or burn out. IF you call that a fire..ok. I have seen a battery explode when there was not much electrolyte left and a large amount of current was applied to it. I guess a spark between the plates ignited hydrogen generated from the gassing of the remaining electrolyte and as the caps were still on it blew a corner out of the case. Tony VE6MVP <[EMAIL PROTECTED]> wrote:
At 01:12 AM 2005-08-24 +, you wrote:>Can anyone relay any real life experiences with this?To add to the many other comments I recently drove a ham to a remotish link radio site and helped him a bit with replacing the batteries. They were two auto batteries from totally different manufacturers. One was so hot you could barely touch it. The other was room temperature. The battery charger had gotten very hot as well. So much so it was uncomfortably warm to the touch five minutes later. The ham, who has vastly more experience than I do, stated there could've been a fire within days.The two batteries were replaced with a highway truck sized battery which was the same size as the two previous batteries put together.TonyYahoo! Groups Links<*> To visit your group on the
 web, go to:http://groups.yahoo.com/group/Repeater-Builder/<*> To unsubscribe from this group, send an email to:[EMAIL PROTECTED]<*> Your use of Yahoo! Groups is subject to:http://docs.yahoo.com/info/terms/__Do You Yahoo!?Tired of spam?  Yahoo! Mail has the best spam protection around http://mail.yahoo.com 













  




  
  
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[Repeater-Builder] Re: whats is the differ between the VHF & UHF

[Ron Wright]

Dimiters,

Sounds like Wayne has done this before.  

As to using VHF for bridge to ship probably because this is where 
the standard marine band is in the USA.  Sounds as if UHF is best 
inside ship.

This problem does remind me of a project from about 30 years back 
where in a sports stadium having HT comm down into the complex did 
not work.  The solution was passive repeaters where two antennas, 
one on top and another down deep in the structure worked well.  The 
near antenna picked up the siganl and it was taken to the other.  
Sure alot of loss, but much better than HT to HT.  In some cases 
simply well shielded & isolated low power amps were used between the 
antennas for one way paging repeaters.  Since the two antennas could 
hear one another there was not an interference problem.

73, ron, n9ee/r


--- In Repeater-Builder@yahoogroups.com, "Wayne Cornick" 
<[EMAIL PROTECTED]> wrote:
> Another problem is whenever the water tight doors are closed you 
end up with
> no communication outside that compartment.
> On board a River Casino we used a low power repeater and set up 
multiple
> antennas on tap points throughout the below water level 
compartments.
> Communications are possible anywhere aboard the vessel doors open 
or
> closed.UHF is a must!
> 
> Wayne
> 
> Hussien, as usual what appears to be a simple question can lead to 
a 
> very complicated answer.  Usually VHF is used on the Bridge to 
talk 
> to other ships or the shore, and UHF is used by the deck crew for 
> intra ship communications.  If you give me more specifics I can be 
> more detailed.
> 
> Relief Radio Officer MV President Grant
> Gregory Gordon AC6VJ






 
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[Repeater-Builder] Re: whats is the differ between the VHF & UHF

[Ron Wright]

Dimitris,

The basics of radio line of site propagation such as VHF and UHF the 
lower the frequency the better and stronger pentration through an 
object/medium.  So VHF will pentrate a wall better than UHF.

When it comes to going thru openings such as windows the higher the 
frequency the better.  Even though there are holes in a wall 
depending on the size and frequency used the holes will look more 
like a wall or shield to lower frequencies, but openings to higher 
frequencies.  This is why a UHF HT with rubber duck will often work 
better than a VHF in a car or building.  The higher the frequency a 
hole will look more like a hole.  If you had a metal enclosure made 
of typical window screen it will look like a solid wall to RF until 
the frequency becomes high enough so the holes are large in 
wavelength.

So with the ship I suspect the VHF would work best since you are 
trying to pentrate walls.  However, since made of enclosed steel I 
bet about any frequency would be blocked.

Sounds as if you have tried VHF.  Would be interested to see UHF, 
but due to few holes probably would be worse, but I have never tried 
it on a ship.

73, ron, n9ee/r



--- In Repeater-Builder@yahoogroups.com, "Velissaris Dimitris" 
<[EMAIL PROTECTED]> wrote:
> We already tryied tests inside a big ship of our navy force.
> 
> Frequencies on vhf band (140-170 MHz) and we had contact until 6 
heavy and
> closed door on the same horizontical level , after that nothing at 
all..
> 
> Tranceivers was tk-2160 by Kewnwood company with a power output 5 
Watt.
> 
>  
> 
> Best regards
> 
>  
> 
>  
> 
> Dimitris Velissaris
> 
> Technical Support
> 
> RadioCommunications Dpt.
> 
> ANCO S.A
> 
> 44 Syngrou Ave
> 
> 117 42 Athens - Greece
> 
> Tel : +0302109209217
> 
> Fax : +302109209345
> 
> URL : www.anco.gr
> 
> e-mail : [EMAIL PROTECTED]
> 
>  
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of hussien reda
> Sent: Wednesday, August 24, 2005 4:57 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] whats is the differ between the VHF & 
UHF
> 
>  
> 
> Hi 
> 
>  
> 
> can anyone please tell me which the best VHF or UHF to select it to
> communicate inside the big ship , i think the UHF best to 
select it
>  thanks 
> 
>  
> 
> Best Regards
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
>   _  
> 
> YAHOO! GROUPS LINKS 
> 
>  
> 
> *  Visit your group "Repeater-Builder
>  " on the web.
>   
> 
> *  To unsubscribe from this group, send an email to:
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>   
> 
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>   Terms of Service. 
> 
>  
> 
>   _






 
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Re: [Repeater-Builder] MSF-5000 and narrow band crystal filter?

[radio5000]

Try this- http://www.com-spec.com/narrow.htm
 
Will
KC4YBZ
 
In a message dated 8/25/2005 6:46:52 AM Central Standard Time, 
[EMAIL PROTECTED] writes:
Hello.  A group I am in was given a Motorola MSF-5000 repeater 
  thatwe're going to be using in the LMRS frequency range.  I am not 
  arepeater expert but am doing some of the legwork to figure out 
  whatneeds to be done.To get a frequency coordinated, the repeater 
  needs to operate in 12.5kHz narrow band.  It's my understanding that 
  this equipment is wideband but can be modified to narrow with a "narrow 
  band crystalfilter."  Does that sound correct and if so:  
  where does one find said crystal filter?  how difficult of a job is 
  it to install?Thanks a 
lotCarltonW3DOE

 













  




  
  
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Re: [Repeater-Builder] Batteries in Parallel

[Mark A. Holman]

As a sugguestion, if the wire has any green corrsion I would replace the 
stuff with new, especially if that wire got hot ,  from my experience.   
Mark AB8RU

Tony VE6MVP wrote:

>At 12:42 AM 2005-08-25 -0400, you wrote:
>
> > Those BCI -31's are good batteries, you can add extras on if
> >you need to but you would have to go to a HD Truck Parts place or
> >dealership to make up a special 2 or more battery cable,  your cable
> >should be #6 or larger diameter ( #4 ,or #0 ) depends on how much
> >current the system is drawing..
>
>All that was attached to those radios were 2 UHF linking radios wired back 
>to back.   So the most power they would use would be, guessing 20 amps, 
>when one radio is transmitting.   I have no idea what gauge of wire was 
>used.   They'd been there for at least five or ten years if not even 
>fifteen or twenty. I say 20 amps because 22 amps was what an electrical 
>place told me my mobile radio was consuming when we were stress testing the 
>alternator and battery in my car.
>
>And the other ham was far, far more experienced with all this than I am.  I 
>was basically just the driver and gopher.  
>
>Tony
>
>
>
>
>
>
>
> 
>Yahoo! Groups Links
>
>
>
> 
>
>
>
>
>
>  
>




 
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Re: [Repeater-Builder] Batteries in Parallel

[Tony VE6MVP]

At 12:42 AM 2005-08-25 -0400, you wrote:

 > Those BCI -31's are good batteries, you can add extras on if
 >you need to but you would have to go to a HD Truck Parts place or
 >dealership to make up a special 2 or more battery cable,  your cable
 >should be #6 or larger diameter ( #4 ,or #0 ) depends on how much
 >current the system is drawing..

All that was attached to those radios were 2 UHF linking radios wired back 
to back.   So the most power they would use would be, guessing 20 amps, 
when one radio is transmitting.   I have no idea what gauge of wire was 
used.   They'd been there for at least five or ten years if not even 
fifteen or twenty. I say 20 amps because 22 amps was what an electrical 
place told me my mobile radio was consuming when we were stress testing the 
alternator and battery in my car.

And the other ham was far, far more experienced with all this than I am.  I 
was basically just the driver and gopher.  

Tony







 
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Re: [Repeater-Builder] MSF-5000 and narrow band crystal filter?

[Maire-Radios]

still seeing some get 25k freg.(wide)  just had a office center get one in 
the 451.xxx  area.   So I think they are still out there.


- Original Message - 
From: "cdoe333" <[EMAIL PROTECTED]>
To: 
Sent: Thursday, August 25, 2005 1:28 AM
Subject: [Repeater-Builder] MSF-5000 and narrow band crystal filter?


> Hello.  A group I am in was given a Motorola MSF-5000 repeater that
> we're going to be using in the LMRS frequency range.  I am not a
> repeater expert but am doing some of the legwork to figure out what
> needs to be done.
>
> To get a frequency coordinated, the repeater needs to operate in 12.5
> kHz narrow band.  It's my understanding that this equipment is wide
> band but can be modified to narrow with a "narrow band crystal
> filter."  Does that sound correct and if so:
>  where does one find said crystal filter?
>  how difficult of a job is it to install?
>
> Thanks a lot
>
> Carlton
> W3DOE
>
>
>
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
> 






 
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RE: [Repeater-Builder] whats is the differ between the VHF & UHF

[Velissaris Dimitris]

We already tryied tests
inside a big ship of our navy force.

Frequencies on vhf band
(140-170 MHz) and we had contact until 6 heavy and closed door on the same horizontical
level , after that nothing at all….

Tranceivers was tk-2160
by Kewnwood company with a power output 5 Watt.

 



Best
regards

 

 

Dimitris
Velissaris

Technical Support

RadioCommunications Dpt.

ANCO S.A

44 Syngrou Ave

117 42 Athens - Greece

Tel : +0302109209217

Fax : +302109209345

URL : www.anco.gr

e-mail : [EMAIL PROTECTED]



 

-Original
Message-
From:
Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of hussien reda
Sent: Wednesday,
 August 24, 2005 4:57
 PM
To:
Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] whats
is the differ between the VHF & UHF

 





Hi 





 





can anyone please tell me
which the best VHF or UHF to select it to communicate inside the big ship ,
i think the UHF best to select it  thanks 





 





Best Regards





















  




  
  
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[Repeater-Builder] MSF-5000 and narrow band crystal filter?

[cdoe333]

Hello.  A group I am in was given a Motorola MSF-5000 repeater that
we're going to be using in the LMRS frequency range.  I am not a
repeater expert but am doing some of the legwork to figure out what
needs to be done.

To get a frequency coordinated, the repeater needs to operate in 12.5
kHz narrow band.  It's my understanding that this equipment is wide
band but can be modified to narrow with a "narrow band crystal
filter."  Does that sound correct and if so:
  where does one find said crystal filter?
  how difficult of a job is it to install?

Thanks a lot

Carlton
W3DOE









 
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RE: [Repeater-Builder] Re: whats is the differ between the VHF & UHF

[hussien reda]

Hi
 
thanks for these information, i will install one repeater in deck four , ( the ship contain 8 decks ) i will used UHF repeater  GR500  with 45 W to cover all the ship , dimension for the ship ( lenght=160m,height=30m) . another question if i installe 2 repeater diffrent frequences in the ship is that make interferance???
 
Best regards Wayne Cornick <[EMAIL PROTECTED]> wrote:
Another problem is whenever the water tight doors are closed you end up withno communication outside that compartment.On board a River Casino we used a low power repeater and set up multipleantennas on tap points throughout the below water level compartments.Communications are possible anywhere aboard the vessel doors open orclosed.UHF is a must!WayneHussien, as usual what appears to be a simple question can lead to a very complicated answer. Usually VHF is used on the Bridge to talk to other ships or the shore, and UHF is used by the deck crew for intra ship communications. If you give me more specifics I can be more detailed.Relief Radio Officer MV President GrantGregory Gordon AC6VJYahoo! Groups Links<*> To visit your group on the web, go
 to:http://groups.yahoo.com/group/Repeater-Builder/<*> To unsubscribe from this group, send an email to:[EMAIL PROTECTED]<*> Your use of Yahoo! Groups is subject to:http://docs.yahoo.com/info/terms/__Do You Yahoo!?Tired of spam?  Yahoo! Mail has the best spam protection around http://mail.yahoo.com 













  




  
  
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