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captainron19

FM Transmitter Antennae

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I have a Ramsey FM Transmitter and I keep it inside at a window at the front of my house. I am getting sick of my stupid cat bumping into it and knocking the antennae down (has the metal telescoping antennae with a swiveling 90 degree joint and a BNC Connection) between us I think the little ##*#*#***## knocks it down on purpose because he likes my wife better than me.

Anyway I bought some BNC Cable and a double female connector with the hopes of running the wire for the antennae to the exterior of the house. Not only will it stay stationary out there but I figure it might give me a little more range.

My question is .... would the antennae be ok outside or should I do my best to keep it out of the weather? I would like to secure it to a stake and have it out in the flower bed but if you guys think it should be out of the weather as much as possible I can maybe find a spot for it under on the porch

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The only problem with it being in the weather is that it will rust and need to be replaced. I only got two years out of my rabbit-ear job before it rusted out. But that's okay, because it led me to get a Ramsey j-pole antenna kit and that baby rocks.

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Guest Don Gillespie

George Simmons wrote:

Here's where I got mine. Rudimenntary soldering skills are all that's needed.

http://www.hobbytron.com/Tru-Match-FM-Broadcast-Antenna-Kit.html

George I have ordered one the J pole anteneas hasn't arrived yet, last night during routine testing I noticed a small static in my radio when listening to my show will this cure this? I can not figure out where the static is coming from.

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Don,
I have an FM30B and if the input volume is too high, I also got a fair amount of static.

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Guest Don Gillespie

grump010 wrote:

Don,
I have an FM30B and if the input volume is too high, I also got a fair amount of static.

thanks Daryl last night no static at all strange.

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Robin wrote:

Get yourself a J Pole...

+1,+1,+1,+1, etc.

Amen and good night!

For the price, a J-pole can't be beat! Commercial broadcast quality on a shoestring budget - what's there not to like about that?

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Jeff Spooner wrote:


Jeff Millard wrote:
I'm on the other side of th Delaware. What freq will you be transmitting on? The radio stations in the Philly area stink and you display might be worth listening to. It's certain I'll be able to hear it.

Jeff

How much did you pay for that thing?? Hopefully not much so you will have some left to pay for the fines. I might be able to even pick it up in Ohio on a clear night. I think it was Orville (or maybe somebody else) that had an overpowered transmitter but heard some of the horror stories about what could happen to such an owner of one--think he switched since then. Maybe he will chime in on the discussion.

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james campbell wrote:

yikes better have a license to run that monster:) really 100 watts

Not to mention a bigger antenna than a J-pole

I'd get started now - the permits and such shouldn't take more than a couple years.

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IM GOING INTO MY SECOND YEAR OF THIS BLINKY FLASHY LIGHT STUFF I KNOW WHAT WORKS FOR ME MAY NOT WORK FOR SOME but i can tell you this yes steel will rust if let to its demise in the weather the link below is what i was advised to get when i first started out this antenna is made of non rusting materials is tunable across the fm band for the lowest vswr when ever teamed with an edm transmitter im not going to tell how far it goes(im very pleased)to the thread sarter who has a Ramsay you have my condolences.http://www.fmdxantenna.com/proddetail.php?prod=14tun#.TzXjTvmCBAA

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Or, you could get a thumb tack and press it into the sheet rock about say 3" above the tip of the antenna. Then use some thread, or dental floss (waxed or non-waxed) and tie the tip of antenna to thumb tack. Surely a low cost, low tech way of fixing the cat problem. Any yes, the telescoping antenna will rust in short period of time. And the J-Pole antenna has gain, and you have to run the coax out of the house making a hole in the wall.

BTW love that 100 watt transmitter. No static and well, lets just say job security for the local FCC field office.

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Guest guest

Max, its not worth even commenting anymore. Someone will become an example, maybe Mr Spooner will be it.

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well don to tell you the truth i don t have a hole in my house this year Irene renumber Irene saw fit to drop a 90 foot oak tree on my house i had to rebuild the frount half of it while doing that i planed ahead and had in wall connectors installed during the rebuild 2 cat 5 1 coax 2 tru wall double sided 110 sockets power from controller for edm but like i said what works for me might not work for every body thanks for the response

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I keep everything outside sprayed with Lube to stop all rust and the J-pole works great.

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Guest guest

t purser wrote:

well don to tell you the truth i don t have a hole in my house this year Irene renumber Irene saw fit to drop a 90 foot oak tree on my house i had to rebuild the frount half of it while doing that i planed ahead and had in wall connectors installed during the rebuild 2 cat 5 1 coax 2 tru wall double sided 110 sockets power from controller for edm but like i said what works for me might not work for every body thanks for the response


??

I was referring to Max's comment re "BTW love that 100 watt transmitter. No static and well, lets just say job security for the local FCC field office."

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Even though this is an old thread brought back to life, I wanted to throw in this link for an antenna in case anyone is still looking for one.
Looks nice and is tunable as well as not that expensive.

http://www.fmdxantenna.com/proddetail.php?prod=14tun#.Tva1d_ImdQI

Just an FYI for another source for one.

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Guest guest

Concerning J Pole Antenna's, the red bolded, itailicized and underlined was initially the same color and style as the rest of the text. I did this to show that this type of system is not a recommended system for the FM transmitters we use in our hobby.

Taken from:
http://diylightanimation.com/wiki/index.php?title=FM_Transmitters

J-Pole: The J-pole antenna, also called the Zepp' antenna (short for Zeppelin), was first invented by the Germans for use in their lighter-than-air balloons. Trailed behind the airship, it consisted of a single element, one half wavelength long. This was later modified into the J-pole configuration, which became popular with amateur radio operators because it is effective and relatively simple to build.
The J-pole antenna is an end-fed omnidirectional dipole antenna that is matched to the feedline by a quarter wave transmission line stub. Matching to the feed-line is achieved by sliding the connection of the feedline back and forth along the stub until a VSWR as close as possible to 1:1 is obtained. Because this is a half-wave antenna, it will exhibit gain over a quarter-wave ground-plane antenna. The J-pole is somewhat sensitive to surrounding metal objects, and should have at least a quarter wavelength of free space around it. This is another complicated fixture and adding any gain to our FM transmitters is not the direction the FCC would like us to go. For these reasons, I do not recommend using this system.

[align=center]--------------- End of copied statment --------------[/align]
So if you use one of these J Pole antennas, you do so at your own risk.



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Guest guest

BTW: my telescoping antenna I got with my MBB Eclipse-4000 has been used OUTSIDE in rain, sprinklers and harsh heat, it has not tarnished or rusted in the 2 years it's been outdoors in the Florida climate. It's made from aluminum, not steel, most antenna today are aluminum to prevent this corrosive problem of rust.

My antenna has been watered down enough that if it were going to rust or show any signs of rust, it would be doing so.

It really doesn't take rust long to occur on certain metals exposed to the elements for a little over 6 months to a year.

There is a very simple test to see if your antenna is the type that will rust away or be more tolerant of the outside weather, get a common magnet, a refrigerator magnet works just fine for this test.

Take the magnet and place it near the antenna and try to attract it, if the magnet pulls toward or sticks to your antenna, it's steel, if not, then it should be aluminum and you should be fine for many years of use.

This is why car antenna don't rust away like they used to many years ago, the newer ones are aluminum and can be found usually in black or silver colors, but other colors may be available depending on the what company made the vehicle.

Most often today, car antenna are built into the rear window or the windshield, but some still have external antenna. And none of these external antenna rust because they are made of aluminium in most cases.

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Orville wrote:



Most often today, car antenna are built into the rear window or the windshield, but some still have external antenna. And none of these external antenna rust because they are made of aluminium in most cases.

Geez Orv, how old are your cars? Windshield antennas went away years ago..I haven't seen one in the last 4 cars I've bought, ranging from 1999 or so up to a week ago. Its all external, and has been for a long time.

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