Wire and Pole Communication: Where is it still in use?

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Millisle

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On one of my occasional journeys on the Aberdeen-Inverness line a fortnight ago it struck me again that it is, as far as I recall, the only route I travel that still has telegraph pole and open wire communication for much of the way. I wondered where else that can still be found.
 
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Railsigns

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I don't think you'll find any other lines on NR that still have a pole route.
 

Millisle

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So considering that BT eliminated open wire on the telephone network a couple of decades ago, it is probably the last example of the technology in ordinary use in the entire country. I remember how the open wire sang like an Aeolian harp in the wind. Though you had to be on the ground to hear it, not the train!
 
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HMS Ark Royal

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Was it that line that, under certain conditions, you could pick up the SPT and hear Radio 4 LW?
 

John Webb

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At St Albans South signal box we're planning to erect a few telegraph posts along the garden and fit them with the appropriate cross-bars, insulators and wire to replicate a short sample of the formerly ubiquitous pole routes.
 

47271

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Not only the telegraph lines, but to complete the picture, the double track section between Insch and Kennethmont still had quite a bit of jointed track both sides when we drove past a couple of years ago. It could be a main line from 100 years ago, they should hire it as a film set!
 

Tio Terry

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Wasn't the last section in use in England between Ely and Norwich?

I'm not sure but I think the line from Reedham to Lowestoft may have been the last pole route in use.
--- old post above --- --- new post below ---
At St Albans South signal box we're planning to erect a few telegraph posts along the garden and fit them with the appropriate cross-bars, insulators and wire to replicate a short sample of the formerly ubiquitous pole routes.

If you need any help, I'm probably one of the last people to be trained in pole route construction methods and things like Transpositions and wire terminations.
 

Bald Rick

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At St Albans South signal box we're planning to erect a few telegraph posts along the garden and fit them with the appropriate cross-bars, insulators and wire to replicate a short sample of the formerly ubiquitous pole routes.

If you need planning permission, expect a fight! St Albans DC seem to be refusing everything at present. (He says bitterly).
 

Parham Wood

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If you do manage to get a pole route erected then don't forget the transpositions.
Any idea why the transpositions were as shown? I suspose someone once upon a time measured the cross induction/capacitance/interference and came up with the scheme. I thought it might also depend on what each wire or wire pair was used for.
--- old post above --- --- new post below ---
Was it that line that, under certain conditions, you could pick up the SPT and hear Radio 4 LW?

I can image this could be so as it would depend on the wire lengths. If they approached a harmonic of the radio channel then it would be possible to pick up the channel. This happened to me several times whilst balancing/transpositioning a twisted pair cable that was going to replace a pole route. I was measuring the capacitance between wires using a tone and adjusting the set until there was a null in the headphones. This was to work out how each 500m of cable would be transpositioned at the joint. Since the cable length was 500m when three lengths were together Radio 2 1500m LW could be picked up. Could listen to Jimmy Young in the middle of now where on the Marches line. It was very annoying as it drowned out the null point.
 
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