[BC] Copper program loops

[Mike McCarthy]

Jeff,
How long is the circuit?  If its less than 5000 ft. of wire feet, then a 
pair of 111C's back to back in 150 ohm configuration should work 
fine.  Otherwise, the associated equalizers will be needed.  Both can be 
had surplus.  E-bay regularly has them for $50 ea.

I have in the past used a graphic equalizer to smooth out the curve if it 
was possible.  But depending on the amount of correction needed, that would 
be a worse off selection.

Also, you could also run a DC closure on the pair by inserting a good sized 
cap between the coils at the center and injecting 12-48VDC on the pair.

I have an equalizer and 111C if you want to try that route out before 
committing.

MM

At 02:28 AM 4/6/2007 -0400, Xmitters at aol.com wrote

>Hello:
>
>I have one of those rare situations where I actually have access to telco
>copper from my studio over to my STL center/backup satellite RO, a mile and a
>half away. Who makes program quality repeat coils and program equalizers 
>anymor
>e?
>Tell Labs still around?
>
>I could do this shot fairly easily with a wireless LAN or unlicensed
>microwave solution, but that's rather expensive. Plus I do not want to 
>depend o
>n
>unlicensed microwave solutions for program transmission.
>
>However, I would be interested in looking at an economy T1 solution if at all
>possible. This is a backup circuit between my studio and backup satellite
>receiver for CPRN classical music service. I also need to get relay 
>closures fr
>om
>the satellite RO back to my studio. I'm considering a BT touchtone encoder
>and decoder on a separate pair from the audio for that. I can use this for 
>othe
>r
>signaling needs as well.
>
>Now if I could find some T1 equipment that could do stereo audio plus the
>contact closures and not cost two grand, that would be great and much more 
>21st
>
>century. Anything out there like that or should I go the old fashioned way 
>and
>use the telco copper? NIU TV Center has a dish I can use plus access to 
>fiber!
>Are there inexpensive fiber solutions?
>
>BTW I should point out that this is for a backup system to our studio located
>satellite RO. We had a situation this week where we had to replace the studio
>RO. The contractor had a trailer mounted dish to keep us on the air. We had
>high winds overnight that quite literally, blew us off the air. My old RO 
>at my
>
>STL center is one of those old Andrew dishes that NPR used back in the early
>80's, and it ain't going anywhere due to wind. However, it quite likely is 
>not
>a two degree compliant dish, our manual for it is long-gone so don't know.
>That site was in fact equipped with one satellite receiver that kept Morning
>Edition on the air during our wind-outage. The classical station had to be
>programmed manually and locally.  Not good when you have an "automation 
>sized"
>staff.
>
>So this backup won't be used a lot, but it's gotta be decent. The studio RO
>dish is used 24/7/365, feeds five radio stations and little down time 
>available
>
>for peaking, crosspole adjustment and dealing with the inevitable failed LNB
>replacement, and to do it right, the crosspole should be optimized with the
>replacement LNB. Right now we don't have much choice but to plop in a new one
>and if it works, sign back on and call it a day. I don't like that 
>approach; we
>
>need the time to do it right.
>
>Jeffery E, Glass, BSEE CSRE
>Chief Engineer
>WNIU WNIJ
>Northern Illinois University
>
>Dell CPi-D266 Win98SE AOL ver 5.0
>**************************************
>  See
>what's free at http://www.aol.com.
>_______________________________________________
>
>The BROADCAST [BC] list is sponsored by SystemsStore On-Line Sales
>Cable-Connectors-Blocks-Racks-Wire Management-Test Gear-Tools and More!
>www.SystemsStore.com       Tel: 407-656-3719    Sales at SystemsStore.com