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Old 06-27-2011, 08:35 PM   #1
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Crank-up antenna/Digital era

Does anyone use there crank-up antenna in this new digital era? Does it work alright? I was thinking of hooking mine up to a digital/analog converter box and see what happens (I haven't bought a digital ready TV for the RV yet). Heres the problem: I need to run new coaxial from the antenna down to the interior wall hook ups. What is the goop that they used to seal holes and seams on the roof? Is there a current replacement goop?
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Old 06-27-2011, 08:41 PM   #2
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I just used mine today & it works great. The "goop" you should use is Tempro--formerly called Vulkem. You can get it at Vintage Trailer Supply. We ran a new coaxial when we bought the trailer about 4 years ago & that made a huge difference. I got more channels at the campground than my sister-in-law who has some sort of batwing.
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Old 06-27-2011, 08:42 PM   #3
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Those antennas work great! I've been using one for years. The antennas don't know or care whether the signal is digital or analog. Don't know what the goop is, but my first guess would be Vulkem. According to Vintage Trailer Supply, the original is no longer available, but the new version is TremPro 635.
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Old 06-27-2011, 09:03 PM   #4
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The answer is yes, the antenna will work with digital signal.

I replaced a tv in my trailer a few weeks ago with a digital. I get 23 channels when parked at home. I got only one channel last week while parked in the mountains. So it depends on where you are at, as to what your reception will be. Also the factory installed amplifier does great with the digital signal.

I was on top of the trailer checking the wires and antenna mount, etc., and found I needed some sealant. I stopped by Out of Doors Mart to ask what I should use. They said use Vulkem, then sold me Trem-Pro635.
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Old 06-27-2011, 09:14 PM   #5
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If you have a new television, it's probably a flat screen. It will have a digital tuner. Just hook it up and you're good to go. If you have an old unit with a cathode ray tube it's probably analog. You will pay half the price of a new 13"or 14" digital unit just to get an A to D converter. Go digital.
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Old 06-27-2011, 10:53 PM   #6
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Quote:
Originally Posted by Darel View Post
Heres the problem: I need to run new coaxial from the antenna down to the interior wall hook ups. What is the goop that they used to seal holes and seams on the roof? Is there a current replacement goop?
I think you are wise to replace the old cabling, Darel. The connectivity doesn't improve with age, plus the old flat 300 ohm "twin lead", which is what my trailer is set up for, is not longer used. That means adding a 75 to 300 ohm balun somewhere, which again is one more connection point that will corrode.

The good news is that the modern digital signal is captured quite well by the old style antennae. So if you have a modern TV with the new style tuner, hook it up and off you go!
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Old 06-28-2011, 04:07 AM   #7
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Goop! Ask for it by name!
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Old 06-28-2011, 06:26 AM   #8
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I stopped by Out of Doors Mart to ask what I should use. They said use Vulkem, then sold me Trem-Pro635.
The company seems to use the names and terms interchangeably. I pulled a tube of Vulkem off the shelf yesterday, and it was labeled Trem-Pro 635. Last week, I pulled a tube of Trem-Pro 635 off the shelf, and it was labeled Vulkem.
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Old 06-28-2011, 08:44 AM   #9
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You can get a transformer that has a coax connector at one end and twin leads at the other end. Attach the leads to the antenna where the old ribbon wire is connected; use the same screws. The coax wire will make a big difference.
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Old 06-28-2011, 09:34 AM   #10
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Those antennas work great! I've been using one for years. The antennas don't know or care whether the signal is digital or analog. Don't know what the goop is, but my first guess would be Vulkem. According to Vintage Trailer Supply, the original is no longer available, but the new version is TremPro 635.
Just ordered a tube of Vulkem from Amazon. Hope it's the real stuff!
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Old 06-29-2011, 10:50 AM   #11
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Correct caulk product for the application

Quote:
Originally Posted by overlander63 View Post
The company seems to use the names and terms interchangeably. I pulled a tube of Vulkem off the shelf yesterday, and it was labeled Trem-Pro 635. Last week, I pulled a tube of Trem-Pro 635 off the shelf, and it was labeled Vulkem.
Terry,
When I bought the caulk at your sales counter, I noticed someone had written with a marker right on the TremPro 635 tube, "Vulkem". So I assumed exactly what you said, you use the products interchangeably.

I read the Trempro specs for several of their urethane caulks this week and found they make several similar urethane caulks, but not all of them are reccomended for trailer applications. Anyone buying this brand of caulk should take time to read those specs, since some, like TremPro 636, are not reccomended for use on trailers. Trempro 635 and Trempro 650 are specifically formulated for trailer repair. It says this right in the specs.

I read on other threads in this forum that some people are using the Trempro 636 material, since they saved a few $ per tube. I do not understand taking that risk after spending big $ on a rebuild.

I wonder, does anyone have long term experience with 635 vs: 636? Any Trempro reps out there in this fourm?

Alan
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Old 06-29-2011, 08:19 PM   #12
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Quote:
Originally Posted by Antique Pedaler

Just ordered a tube of Vulkem from Amazon. Hope it's the real stuff!
What type (#) Vulkem did you order on Amazon? How long of a shelf life does it gave? Any idea?
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Old 06-29-2011, 08:28 PM   #13
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What type (#) Vulkem did you order on Amazon? How long of a shelf life does it gave? Any idea?

If you put it in the freezer it will last a long time I only do that with open tubes...wrap them in plastic wrap and put it in the freezer, haul it out the night before you are ready to use it. I have a 3 year old tube in there that I took out last week and it thawed right out.

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Old 06-29-2011, 09:59 PM   #14
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I would definitely replace your wire that is pictured. The 90 degree bend shown in your second picture implies the shielding is deteriorated. You will get inconsistent operation with varying levels of moisture.

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