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Fixing a thin spot in a tuner string?

B

bd1886

Super Member
When I was on a trip to see family a few months ago, I found a nice Yamaha CR-2020 that needs work. It was kind of a last minute find and just before leaving to come back home, I opened it up, did an inspection and cleaning late in the evening before catching my flight home. I was tired and didn't notice a central L-bracket hanging down from the case's front leading edge and....ended up catching the tuner string with it and creating a "thin spot". (Ughhhhh)

Anyways...heading back up to visit again and going to bring it back home. While I'm there going to look into what all it needs to get it up and going, finish the cosmetics, and fix that string!
I was thinking of doing a silk wrap to the weakened area with a "blend" back into where the string is intact. If this is the way to do it.....what glue would I use that would hopefully eliminate keep the tuner action smooth? Thinking it through, silicone would create a drag and attract a mess,regular white glue would get brittle and create a future cracking/weakening issue....has anyone used a good/long term solution for this? Appreciate it and looking forward to seeing her again! (She's been sitting in a garage kitchen for several months now waiting for "Daddy"....poor thing.)
 
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If the thin spot is in the middle of where the pointer is attached, it doesn't have to flex. Use Superglue. works fine.
 
I would take pictures of it now, and make a hand drawn sketch paying particular attention to the tuning capacitor position, how many wraps around the tuning capacitor's wheel, how many loops and the direction of the loops around the tuning flywheel. More information, the better.

This is just in case the thing snaps on you. Having info beforehand is way better than trying to skull it out. Especially if you try it on a first time basis.
 
The yamaha service manual usually has a pretty good page dedicated to dialcord restringing.
 
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Jon_Logan said:
I would take pictures of it now, and make a hand drawn sketch paying particular attention to the tuning capacitor position, how many wraps around the tuning capacitor's wheel, how many loops and the direction of the loops around the tuning flywheel. More information, the better.

This is just in case the thing snaps on you. Having info beforehand is way better than trying to skull it out. Especially if you try it on a first time basis.
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^Nothing like actually having pictures and a drawing you made yourself to follow and understand.

Pay attention to how the string wraps, enters and exits the tuning wheel, the grooves occupied when fully turned to the left and right.

Also notice how the gears are positioned in case you forget how gears are repositioned. This will come in handy if the tuning wheel accidentally pops off. There are notches that have to be positioned just right.

And of course note how the strings are strung through all the pulleys and also the tuning knob.
 
This help is huge you guys! I'm going to take a set of pictures for all my gear maintenance...ounce of caution... Perfect! Would be nice to be in contact with an AK'er or two in Anchorage. Have a great 13 cents a lb. shipping deal and could get stuff up there....can't believe Anchorage is so "dry" on audio gear. (It has a big metropolitan area and the place was totally insane about it back in the 70's......attrition w/high repair costs there I guess?)
 
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silvernutsaq is in Anchorage if I remember correctly. I sent something to him once.
 
If you decide to restring it use braided bait casting fishing line you will never have to restring the radio again. It is also the primo stuff to sow buttons back on. You can pick up a 150 yards of the stuff for somewhere between $14 and $25 dollars at Cabalas or your local fishing tackle shop, note the diameter of the string used on the radio and duplicate that with the braided line that works out to about 10-15 pound test line. It is abrasion resistant, and will not deteriorate. I have a Gonset G63 reciever I restrung 15 years ago and the braided line looks just like the day I installed it. below is just one of numerous brands.

powerproline.jpg
 
I have plenty of relatives that would have some! (Guys eat,sleep, and dream fishing....not uncommon in the middle of some of the best fishing around.) I'm going to try a repair though as it looks like it can be a royal PITA.....bet I can get several yards for the future. Thanks you guys! (Big help.)
 
bd1886 said:
I have plenty of relatives that would have some! (Guys eat,sleep, and dream fishing....not uncommon in the middle of some of the best fishing around.) I'm going to try a repair though as it looks like it can be a royal PITA.....bet I can get several yards for the future. Thanks you guys! (Big help.)
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The best thing you can do is get a couple of surgical forceps. Clamp down one end and this lets you threat the line threw all the pulleys, wheels and such with the other, and makes it dead simple to hook up the tensioning spring. :yes::D

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transmaster said:
The best thing you can do is get a couple of surgical forceps. Clamp down one end and this lets you threat the line threw all the pulleys, wheels and such with the other, and makes it dead simple to hook up the tensioning spring. :yes::D

28.jpg
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Roach clips..:smoke::D
 
Also, some people use bead string from craft stores.

With the leftover string, you can make groovy wood bead or puka shell neklaces, perfect fashion accessories to go with your roach clips. :D
 
I'm a little dazed and confused......those are called forceps? (No....that is a great trick and tabbing this thread for all the good info.)
 
I had friends who used those (odd, as the friends weren't doctors). They called them hemostats.
Evidently using hemostats made their stereo systems sound better?
I did notice that after using the hemostats sometimes they would get really hungry. Or giggly. Or sleepy.
 
goodolpg said:
I had friends who used those (odd, as the friends weren't doctors). They called them hemostats.
Evidently using hemostats made their stereo systems sound better?
I did notice that after using the hemostats sometimes they would get really hungry. Or giggly. Or sleepy.
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They are known by both names, as well as "Oh wow man thanks" Remember this:

glenn_2.jpg
 
Hemostats vs. Forceps; one has teeth, the other doesn't. I forget which is which. This is to keep from damaging someone's artery you have clamped off, I think. For electronics work, gimme the one with teeth every time.
 
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