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250 feet to the roof...advice?

S

Sgeirk

Two stations...with a 250ft run up an elevator.

We would love to send aes up there...fiber? Other ideas?

Would love to do away with twisted pairs.
 
Audio over IP. Put an Axia node at each end and do Livewire. If your processors have Livewire inputs then you only need one. Use the twisted pair that's in there now to pull a couple CAT6 cables up.
 
If you're thinking to use the elevator shaft for the link, think hard about local codes. They can be really persnickety about anything with metal in it but generally aren't interested in anything completely non-conductive like fiber.
 
A 250' vertical run of copper can be a problem during electrical storm activity. During a lightning strike, that amount of copper can easily pick up enough energy to damage the equipment which is connected to the cables. For that reason, I'd convert to fiber. Make sure to include a couple of extra runs of fiber.
 
Fiber is just as cost-effective as twisted pair in the long run. As someone mentioned above, it is non-conductive and you can get it as plenum-rated.The transceivers may cost a little more depending on the vendor, but it is worry-free for years and years (our link - second floor to elevator cupola - has been in operation 8 years now).
 
The pipe is already in place. We just lost a cat5, could be lightning related.

Weve been lucky and thinking electrically isolating might be smart. Any tranceivers you might recommend? Thanks, all!
 
All of my fiber equipment is Multidyne (www.multidyne.com) ...does a great job and I've never had a problem with it. Sending audio down on a 40 channel (20 stereo) fiber feed to the transmitters and stl equipment, and bringing satellite rf up 300' to the top of the hill. Completely electrically isolated, and since installing the fiber, have had 0 lightning induced problems. Now watch, now that I've stated that, it'll happen :)
 
Sgeirk said:
Weve been lucky and thinking electrically isolating might be smart. Any tranceivers you might recommend? Thanks, all!
Click to expand...

My experience in this area is running computer data-lines around a car dealership campus. 5 buildings on 20 acres. Nearby lightning bolts can create some very damaging spikes on those lines. About time I left the position one vendor had come up with some isolation devices that were getting good reviews. But what I saw was vendors in that industry moving to fiber for all lengthy runs, and that was two decades ago.
 
Thank you, we are also looking at installing Breakaway ASIO with Airomate. We have had continual RDS issues, with our Inovonics units...perhaps with fiber that would go away...

But a Dell computer running Breakaway and Airomate for our translator on the roof (waiver)...just runs and runs and runs, sounds better than our O6exi's and the RDS works flawlessly.
 
Someone on this board on another topic recently mentioned adding extra devices to the chain would reduce reliability. If your thinking is along those lines, I would do AES using quad shield RG-6 and 75 to 110 ohm transformers on each end along with surge protection from someone like Polyphaser. With good RG-6, you can run AES for up to 984 ft. (300 m) without eq so you might be able to use a building electrical riser and avoid the elevator shaft. You also avoid the fiber box expense and reliability.

Bob
 
I second FiBox.

Anyone that says Fiber is unreliable is out of their mind. It's unbelievably reliable and, again, isolated electrically. You can get 2mi+ distances and the fiber itself is no more expensive than copper.
 
DudeFan said:
I second FiBox.

Anyone that says Fiber is unreliable is out of their mind. It's unbelievably reliable and, again, isolated electrically. You can get 2mi+ distances and the fiber itself is no more expensive than copper.
Click to expand...

But wouldn't you agree that having the electronics of the fiber boxes is less reliable than a passive device (the 110 ohm to 75 ohm transformers)? I'm all for fiber when and where it's needed but it appears to be overkill here and more costly than a simple coax solution. The original post said AES 250 ft. You don't need fiber to do that.
 
Dr. Bob said:
The original post said AES 250 ft. You don't need fiber to do that.
Click to expand...

I think the fiber concept came into the discussion as a way to hopefully dodge the effects of lightning... not direct lightning hits but the spikes that occur on a 250 foot metal run even when the lightning is two, three, maybe five miles away. In good weather, no problem. Metal wires are something we understand, and will do an excellent job.

Fiber came into the thread not because metal won't work, but as a "lightning destruction avoidance method".

As I posted earlier about five buildings interconnected on twenty acrea: "Been there, Done that, Got the tee-shirt". ;D
 
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