Author Topic: Fixing a Distorted coiled Handset Cord.  (Read 50979 times)

Offline cloyd

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Re: Fixing a Distorted coiled Handset Cord.
« Reply #90 on: September 04, 2017, 04:56:05 PM »
Thanks, that helps!
Did you drill holes through each end of your dowel for the wire to suspend it and the cord?  I'm guessing you don't want the cord to rest on the 2" PVC tube when it is getting so hot.
I'm going to put this on my list of things to make!
Well done!

Tina Loyd
-- I am always doing what I cannot do yet, in order to learn how to do it. - Van Gogh -- 1885

Offline TelePlay

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Re: Fixing a Distorted coiled Handset Cord.
« Reply #91 on: September 04, 2017, 05:25:11 PM »
Did you drill holes through each end of your dowel for the wire to suspend it and the cord?  I'm guessing you don't want the cord to rest on the 2" PVC tube when it is getting so hot.

No, I run the station wire through the holes in the end of the 2" pipe and around the dowel. Do that from 3 different angles and I have a way then to adjust the dowel, to get it centered. That's a temporary thing. Now that I know the oven works, to both hold and center the dowel I had planned on drilling and tapping 3 holes, 120 apart in the 2" PVC and then using thumb screws, like in a Christmas tree stand, to center and hold the rod. I'd epoxy glue a nut and washer on the end of each thumbscrew to provide a larger surface to engage the dowel.  Plans in the works, no time to do that yet. Next time I need to tighten a cord, I will get to that.

I have since purchased some smooth, round aluminum rod 4' long by 3/8" diameter. Wood is an insulator. Aluminum will allow the handset cord to heat all the way through. Haven't had time to try that yet.

            John . . .

              

Offline TelePlay

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Re: Fixing a Distorted coiled Handset Cord.
« Reply #92 on: December 05, 2017, 07:13:52 PM »
It's been some time since I found 3/8" round aluminum rod in a 3' length but I finally got a change to use it today.

Did everything the same as I did with wood dowel and it turned out well. Once again I forgot to take a before photo but I do have the first image from the eBay listing. The handset cord really is matching beige, just dirty grey. You can see it was not in the worst shape but it was stretched out in the usual places.

After cleaning, wrapping on the aluminum rod, heating, cooling and unwrapping the cord, it turned out nice.

One thing I did notice was the cord stuck to the aluminum meaning the whole cord was heated. One thing I learned is before doing this, reverse twist the cord so it is back in the original position it was when made and then reverse twisted by WE. I get a better coil when doing it that way, reproducing the way it was done by we when they made these from round cords.

By the way, the phone had 4 sticker areas, glue only, and the one in the box was removed with a wood chisel - left gouges in the plastic which took a half hour to sand out.

It's a bit dis-colored, some of which came out in bleach, but leaving it as it for I know where it is going and how thrilled the guy will be to get it for free. A favor for a favor, not a collector's level phone.
            John . . .

              

Offline TelePlay

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Re: Fixing a Distorted coiled Handset Cord.
« Reply #93 on: April 22, 2018, 08:51:13 AM »
Thanks, that helps!
Did you drill holes through each end of your dowel for the wire to suspend it and the cord?  I'm guessing you don't want the cord to rest on the 2" PVC tube when it is getting so hot.
I'm going to put this on my list of things to make!
Well done!

Tina Loyd

     Regular Member Post

To complete this project for those who are interested in physical phone restoration work, I installed my idea of how to hold the cord carrying rod in the center of the inner tube.

After drilling 3 holes 120 apart in each end of the inner PVC tube, I tapped the holes and screwed 1/4" NC 20 machine bolts into the inner PVC tube. They meet in the middle and hold the rod, a 3/8" aluminum round, in the center keeping the coiled cord on the rod from touching any part of the inner tube during heating and allowing an even hot air flow around the coiled cord. The bolts are easily turned into and out of the PCV threaded pipe by hand and quickly place the rod in a centered position.

The aluminum rod replaced the wood dowel originally used because wood is an insulator and keeps the inside of the coil cooler and not heat treated as much as the outside of the coil. The aluminum rod attains the same temperature as the cord and as such, heats the inside of the coil to the same temperature as the outside of the coiled cord. This provides a much better reforming of the coil than when a wood dowel was used.

This set up has always worked well for me to turn a cleaned, stretched out handset cord into a tight, like new coiled cord.


            John . . .

              

Offline 19and41

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Re: Fixing a Distorted coiled Handset Cord.
« Reply #94 on: April 23, 2018, 02:26:07 PM »
The last 3 or 4 coil cords I've had to clean and put a permanent in,  I have used a plastic coat hanger with the section cut out at the base of the hook to the end of the horizontal section.  I can thread the coil onto it, twist tie one end below the hook and snug it up and twist tie the other end at the cut end of the horizontal.  I give the cord a good saturating spray of scrubbing bubbles bathroom cleaner and rinse with hot water.  I give a wipe off, then run the hair dryer over it and let it set awhile to finish drying.  It just hangs up like a normal hanger.
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Offline TelePlay

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Re: Fixing a Distorted coiled Handset Cord.
« Reply #95 on: July 09, 2018, 04:15:13 PM »
The aluminum rod replaced the wood dowel originally used because wood is an insulator and keeps the inside of the coil cooler and not heat treated as much as the outside of the coil. The aluminum rod attains the same temperature as the cord and as such, heats the inside of the coil to the same temperature as the outside of the coiled cord. This provides a much better reforming of the coil than when a wood dowel was used. This set up has always worked well for me to turn a cleaned, stretched out handset cord into a tight, like new coiled cord.

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My tube furnace continues to turn out fantastic results, even better since I started to use an aluminum rod.

I usually forget to take before images but did so this morning. The cord wasn't "that" bad but it needed recoiling.

After 45 minutes in the furnace with the hair dryer on high (and letting it cool naturally over time - about and hour), the cord coil was restored. The aluminum rod lets the inside of the coil in contact with the aluminum rod and attain the same temperature as the outside of the coil when on the rod, something wood could not do since wood is an insulator. The cord is fully heated with the metal rod.

(Note: the color difference is due to the background used; the before was taken on a grey cloth and the after on a white board - shows the iPhone camera has a problem, or is given a problem, by using certain colored backgrounds, the dark red is more accurate).
            John . . .

              

Offline FABphones

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Re: Fixing a Distorted coiled Handset Cord.
« Reply #96 on: July 09, 2018, 04:21:19 PM »
Amazing results. Like new.  :)
A collector of Black, Ivory, Grey.
'Monochrome Phones with Sepia Tones - and a Duck!'

Offline TelePlay

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Re: Fixing a Distorted coiled Handset Cord.
« Reply #97 on: July 12, 2018, 11:49:11 AM »
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This reply is nothing more than a factual update of another coiled cord restoration, posted with no animus toward any forum member and as such any "have fun" type reply is not expected, desired or acceptable.

============================

Here is another restored cord. After cleaning the cord and getting the coils all going in the same direction, the cord showed a bend near the middle which did not look good when handing from the handset. 45 minutes in the furnace and it's near NOS.
            John . . .

              

Offline HarrySmith

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Re: Fixing a Distorted coiled Handset Cord.
« Reply #98 on: July 12, 2018, 12:28:16 PM »
Nice! They do come out looking like new! Great job! Thanks for sharing with us. I seem to be working on all cloth cords right now so I have not needed this yet but I am excited to try it out. Have you had one done long enough to tell if it is a permanent repair or not?
Harry Smith
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Offline TelePlay

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Re: Fixing a Distorted coiled Handset Cord.
« Reply #99 on: July 12, 2018, 12:50:24 PM »
Have you had one done long enough to tell if it is a permanent repair or not?

The beige 554 (above) was done 3 months ago and is still in the same condition.



With normal use, they don't return to the "before" state. Any coiled cord can be wrecked by overstretching, I suppose.

I clean the cord with a mixture of 10% Acetone, 10% MEK and 80% Denatured Alcohol (really take off any hard fast grim better than soapy water, soapy water left crud this mixture then removed quickly so I start with the mixture) and after I put the cord on the aluminum rod, I go over the outside of the rod mounted cord with that same mixture. It tends to make the rubber cord a bit soft and going over the coils with a wet cloth of the mixture, some of it gets between the coils and along the rod. This, of course, evaporates off but seems to leave a better coil restoration. Can't prove anything since I would need two identical cords and treat one with the mixture to see the difference.

After 45 minutes with the drying on high, the aluminum rod on the ends outside of the furnace are too hot to touch so the inner coil has to be equally affected by the heat. Just my observations from doing them.

The next time I post a before and after cord will be of a badly distorted cord. Did one once successfully but, as typical many times, no pictures.
            John . . .

              

Offline FABphones

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Re: Fixing a Distorted coiled Handset Cord.
« Reply #100 on: July 12, 2018, 01:23:13 PM »
That beige 554 looks like it has just been taken out of the box.  :)
A collector of Black, Ivory, Grey.
'Monochrome Phones with Sepia Tones - and a Duck!'