Trying to bring the antenna cable down from my roof to my living room, it's currently not wired to anything. But instead of a coax cable, I found two of these 4-core monstrosities. I'm guessing the two light green wires are common to eachother, as are the two dark green wires - and each 'pair' is either signal or shield. Any ideas?
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Pinout of TV antenna cable
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Re: Pinout of TV antenna cable
Originally posted by stj View Postthats strange - was any coax with it?
old sattelite dishes had extra control cables.Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD
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Re: Pinout of TV antenna cable
Originally posted by redwire View PostThey might be balanced pairs, like 300Ω twin-lead but I'm not sure what the UK used for antenna feed-ins. One pair for one antenna i.e. VHF, the other for UHF.
There should be a balun or two on the roof.
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Re: Pinout of TV antenna cable
It's got the the fat insulation on the conductors, solid wire- I've seen on some outdoor 300Ω cables.
Did they even use rotators in the UK? I've never seen it here for TV, only ham use. Satellite could use that cable for DC power but the signal still needs to come into the house somehow.
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Re: Pinout of TV antenna cable
Antenna rotators I worked with had a reversible AC motor, brake solenoid, and potentiometer for position feedback. So a few conductors required 3-5 flat 20awg outdoor ribbon cable was commonplace.
Masthead amp power is usually bias-T fed in the coax or two conductor DC power.
You wouldn't use solid copper because of the flex in the wind. It looks thick as if for a higher current load.
OP has got some martian cable.
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Re: Pinout of TV antenna cable
so what and where exactly was the other end of the cable connected to? i dont understand. it wasnt very clear in the first post and subsequent posts. so if both ends werent "wired to anything" like u said then the cable was just lying around or hanging around somewhere in the house. so where exactly in the house was it when u found it? and if the other end was connected to something, try to trace where the cable goes to then. it might offer some clue as to what it was for.
i just need to ask more questions about this and know more things about this light and dark green cabling before we really declare it "alien cabling" or "green martian cabling". or worse, get power and data/signal cables mixed up. mixing up power and signal cables is the fastest way to release the magic smoke from ic chips and stopping them from working anymore.
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Re: Pinout of TV antenna cable
Maybe it's old BT Telephone Cable. What does rural telephone cable look like in the UK? I could find modern cable as a "single quad" but it's thin copper.
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Re: Pinout of TV antenna cable
Originally posted by stj View Postnot telephone,
wrong colours and phone cable uses 2 thin twisted pairs
one thing i noticed in that picture is the thick teflon looking insulation!
I rather think it was a low voltage supply of some sort or a control cable. Small rotators don't have a brake. So a 4 wire cable would be a perfect fit.
The balanced twin lead idea is not right for me as the spacing is way too narrow to be 300 Ohm. What gives?
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Re: Pinout of TV antenna cable
When I worked at an electronics distibutor, there was always odds and ends of the wrong cable someone had ordered, sitting in reels collecting dust.
There was cheapo customers that didn't care- "4 conductor" is all they wanted and we'd sell it cheap to get rid of it.
OP might just have some oddball cable that was cheap. Look for any writing on the jacket, it should have something there.
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