Pickup Rewinds

[SonnyW]

Hi Jim,

Just measured again on the neck pickup. Used a different set of digital calipers just in case. Since it has already been rewound I could only check the dimension on the corners but those measure .181- .189 depending on where you measure. I originally measured without any wire on the bobbin and I think there is a little bit of taper to it, so it would be a bigger gap at the outside than at the deepest part. Maybe they had more than one bobbin mold, I didn't measure the bridge pickup's core it was full and taped up.

As far as any rewinds, the owner says he bought them new and as a set, installed them and then took them back out and kept them stored in his basement for a long time. I did email the owner and ask about this. He said that when he bought the set he thought it was supposed to be humbucking, which could have been a RWRP pair to begin with. Part of the reason he took them out is that they weren't humbucking when switched together. The box says 2000-4 so I don't know what that meant, but maybe a RWRP pair was some kind of an option at the time? There were a lot of versions of the 2000's/ Dynasonics. Owner says they were stored together for a long time and maybe that could have caused one set of magnets to be reversed, but I doubt it because they are pretty much full charge. It will be easy for me to reverse the charge on the neck pickup magnets and make it a RWRP pair though, and that's what the owner wanted originally.

Edit: Went ahead and popped open the bridge pickup and did the same measurements on the corners. It measured .184 - .197, again only measuring at the corners and depending on which corner.

[Jim Darr]

Got in this pair of DeArmonds for repair and rewind. It's a 2000B and 2000T...

Bobbin Core Dimensions

Length: 2.301
Width: .520
Height: .175
Flange: 1.125

Sonny,

Are you sure of the coil height at .175?

I'll have to check my notes, but I think I measured a slightly taller coil at about .21 -- My memory may be fading or the number could include the flats (unlikely since the difference between the two are so small). I know the height difference is not that great, but every detail counts.

As I recall, 44 was the gauge used. I think both were wound in the same direction. Could the neck be a rewind??

Anyway, I'll see if I can find my original notes on this design and see what I captured.

Thanks for sharing.

[SonnyW]

Got in this pair of DeArmonds for repair and rewind. It's a 2000B and 2000T set, owner even sent them in the original box they came in. The neck pickup was dead and while the bridge pickup had an ohms reading, it had a very short lead wire, and the start wire connection had been broken and was only making connection by touching the little brass strip that they have on the bottom. I was able to repair the bridge one by splicing on longer leads, but I had to rewind the neck one. Someone had tried to find the break in it and had untaped it and unwound a few turns, but the main problem was that the start connection had been broken off inside the bobbin. I'll give the bobbin dimensions here shortly, but first I have a question.

These appear to have been intentionally wound out of phase. Has anyone here run into this before on these? They came as a boxed set, I'm guessing as replacement parts. The owner bought them in the late 1960's to retrofit them into a Fender Coronado guitar. I am certain that the neck pickup was wound CCW because I unwound enough additional turns to verify that. Both have south polarity on the magnets. I didn't untape the bridge pickup, but when I do a phase test on them I get positive on the neck and negative on the bridge. I'm using the analog ohmmeter and chunk of metal method to do the phase test. That leads me to believe the bridge pickup is wound CW. I can correct the problem by reversing the polarity on the neck pickup magnets, but first I thought I would ask in the forum.

Bobbin Core Dimensions

Length: 2.301
Width: .520
Height: .175
Flange: 1.125

Bridge measured 11.4K ohms. Wire on the neck pickup looked like #44 poly red. Diameter measured .0023.

[Lollar Jason]

got around to rewinding that- 35,000 turns 44 gauge per coil dont recall turns per layer but it was maximum you can do with 44

[Stratz]

I got this 1967 Tele set in last week for repair.
Both are wound CCW and south up.

I'll need to replace the flatwork on the neck pickup.



These rusty magnets are from an early 70's Tele repair.

[kayakerca]

Very nice Job Jim.
I see you wound it CCW, can you give the Magnet polarity, North or south up.
If you have the Height info between the flats, We can compare to other bridge pickups?
The 8.2k should sound great, I've made some about like that.
Thanks for all the info and pictures.
T

The original was wound CCW and it's south up. The core was .450" between the flats (well, at least where it wasn't flared).

[big_teee]

Very nice Job Jim.
I see you wound it CCW, can you give the Magnet polarity, North or south up.
If you have the Height info between the flats, We can compare to other bridge pickups?
The 8.2k should sound great, I've made some about like that.
Thanks for all the info and pictures.
T

[kayakerca]

Had a dead '67 Tele bridge in for a a rewind. Rust on both end pole pieces in the core area and on pole piece tops as well, but cleaned up nice. Double lacquered the bobbin to try and hold the the flared ends from getting any more so. Taped the core as well for a little more protection (T's flower wrapping tape). Wound it to 8.2kΩ with 42PE. Adjusted the width of the wind on the core every couple thousand turns to try and comfortably deal with the flaring on the ends and still have a reasonable looking coil shape at the end of the day. Only used about 16g. of dead draw tension to try and minimize the level of flaring the wind tension might generate. We'll have to see how things turned out with the rewind in another 48 years.

Customer looking to get to Nocaster output (from what I can find could be anywhere from upper 7kΩ region all the way to 10kΩ zone). Didn't really want to risk adding anymore wire because of the flaring potential. It looks overly "shiny" from the finished photo, but that's really the light angle.
When you hold it in your hand to look it over, it still has a nice looking vintage patina but without the rust.



The only important test will be the tonal characteristics once it's back in the Tele.

[kayakerca]

Oops, I meant to reply to kayakerca, but I know you are also an artist, T!

Lol. . . If I hand guide a wind, I promise I'll disclose that fact. I'm 100% mechanic, 0% artist. ��

[big_teee]

Here's the Dimarzzi SDS-1.
I could only get about 9700 turns on it.
My wire that I used is a little large(but sounds great), .00272".
It measured about 7.3k in the cool shop.
So mine may be the MDS-2. (Medium Distortion Single, 2nd Generation)
I'll pot it tomorrow, and do some more Taping, glue the magnets, and call it good.
T

[elipsey]

Oops, I meant to reply to kayakerca, but I know you are also an artist, T!

[big_teee]

That is a beuatiful coil, I almost can't believe it's handwound!

Please be specific, the Thread is full of them.
I'm fixing to wind this SDS bobbin, you will probably not be able to say that about it!
T

[elipsey]

That is a beuatiful coil, I almost can't believe it's handwound!

[big_teee]

Also on the SDS-1, It was wound North up, CCW.
To match the customers other strat type pickups, I will make it CW South up.
T

[big_teee]

D advertises 8.68k.
http://music-electronics-forum.com/a...uick_guide.pdf
10,000 turns will have to do.
If there is a lot of room left after 10k turns, I may put on some more.
I use to fill them up too much, I don't do that anymore.
T