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Cigar Box Pickup Complete

 
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Kregg



Joined: 22 Apr 2008
Posts: 3334
Location: Atlanta

PostPosted: Sat Sep 18, 2010 10:30 am    Post subject: Cigar Box Pickup Complete Reply with quote

I'm wrapping a single coil for this 3 string cigar box ...

So far I have 8,032 winds ...

... being that it isn't as large as a standard six pole single coil. How many winding should I give it to bring the resistance up to around 6?

Your experience is very much appreciated. Thanks Wink

P.S. I'm using 43 wire
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Last edited by Kregg on Sat Sep 25, 2010 2:51 pm; edited 1 time in total
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Kregg



Joined: 22 Apr 2008
Posts: 3334
Location: Atlanta

PostPosted: Sat Sep 18, 2010 11:17 am    Post subject: Reply with quote

Well, thar went that theory ...
I decided to up the winds, when the wire snapped near 9,100.
I tested the ohms and got a whopping 23K!

Tom, if you're out there ... please 'splain it to me. Embarassed
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Heavy Air



Joined: 04 Aug 2008
Posts: 4309
Location: London, UK

PostPosted: Sat Sep 18, 2010 8:54 pm    Post subject: Reply with quote

Hahah, you went a little over didn't you Wink

When I was first starting winding I found this helpfull;

http://www.salvarsan.org/pickups/Coil_Estimator.html

However, theres no preset 3 string bobbin on there Smile

If I were you Id go for the trial method, all you have to do is test the output whilst you're winding. Just sand or scrape the coating off a small section of wire then you can test that against the start of the coil without having to snap the wire.

If I took a guess Id say about 3-4000 winds with 43 awg would be roughly there. Thats a sheer guestimate though. I'd wind a couple of thousand, test the output then keep going untill you're at 6.

43 awg really takes you to the higher output levels much quicker than 42 awg. I take it its a single build insulation?
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Kregg



Joined: 22 Apr 2008
Posts: 3334
Location: Atlanta

PostPosted: Sun Sep 19, 2010 5:45 am    Post subject: Reply with quote

Thanks! Looks like I'll be unwinding about six thousand winds or so ... Laughing

"I take it its a single build insulation?"
I'm using Stewmac's poly-coated wire.
When you sand the coating off your wire, I take that you fold the sandpaper over the wire and gingerly pull the paper over the wire. Wink
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Heavy Air



Joined: 04 Aug 2008
Posts: 4309
Location: London, UK

PostPosted: Sun Sep 19, 2010 6:44 am    Post subject: Reply with quote

Kregg wrote:
Thanks! Looks like I'll be unwinding about six thousand winds or so ... Laughing

"I take it its a single build insulation?"
I'm using Stewmac's poly-coated wire.
When you sand the coating off your wire, I take that you fold the sandpaper over the wire and gingerly pull the paper over the wire. Wink


yes be CAREFULL when you sand the poly off! That stuff loves to snap. I usually fold a bit of 600+ grit inbetween my fingers and with hardly any pressure Ill do a few wipes in the spot. You'll know when you're through to the copper as the colour will change.

And yeh, the stewmac stuff is single build so thats all good. Good luck! and test the DC often
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Kregg



Joined: 22 Apr 2008
Posts: 3334
Location: Atlanta

PostPosted: Sun Sep 19, 2010 10:35 am    Post subject: Reply with quote

You've been very helpful thanks man. Cool
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Kregg



Joined: 22 Apr 2008
Posts: 3334
Location: Atlanta

PostPosted: Sun Sep 19, 2010 1:16 pm    Post subject: Reply with quote

I measure the pickup after 3001 winds ... 1.9ohms. I said I wanted low, but, that's pushing it a bit the other way. I potted the pickup and now it meter's at 2.8 ... Perfect!
Why did it go up after potting, would this be the work of gremlins? Wink
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Kregg



Joined: 22 Apr 2008
Posts: 3334
Location: Atlanta

PostPosted: Sat Sep 25, 2010 3:15 pm    Post subject: Three's a charm! Reply with quote

I finished the pickup and installed it (after a third winding) ... it sounds great.
Unfortunately, I didn't get any pictures of the pickup or electronics wired in.
Specs:
25" scale.
Made from a Partagas cigar box.
Three piece neck - oak/rosewood/oak - (headstock is O/RW/O/RW/O/RW/O).
Rosewood fingerboard.
Grover tuners.
Homemade bridge, using reclaimed saddles.
Handmade & designed stencils:
The body was sprayed with Montana Gold lacquer in yellow, black & grey.
The back of the neck with Guitar ReRanch rattle can two burst lacquer.
Single coil, 3 pole Alnico 5/4422 winds/2k2ohms.
Single Volume.

Here's a shot of the back:


I built this as a gift for a friend and jazz guitarist at heart who owns a hair salon. His wife was at the salon when I took it in and she was awestruck by how it turned out ... that really made my day. I once told him that he reminded me of a gunslinger with his cutting tools holster; hence the name Hair Trigger.
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Mike B



Joined: 24 Mar 2009
Posts: 1137
Location: Grand Prairie, Texas

PostPosted: Sat Sep 25, 2010 3:44 pm    Post subject: Reply with quote

Man, that's really cool! I've done a cigar box Uke, I'll have to do one of those one day!
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RayRay



Joined: 17 Feb 2008
Posts: 5304
Location: Colorado

PostPosted: Sat Sep 25, 2010 4:22 pm    Post subject: Reply with quote

I like it a lot! Wish you had a sound clip...love this stuff! Cool
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Kregg



Joined: 22 Apr 2008
Posts: 3334
Location: Atlanta

PostPosted: Sat Sep 25, 2010 4:34 pm    Post subject: Reply with quote

RayRay wrote:
I like it a lot! Wish you had a sound clip...love this stuff! Cool

I'll see if my friend will make a clip for us, I'll post it if he does.
Meanwhile, here's a CBG named NEW SIZE that I built for a double neck contest:

The pickups were giving me fits, so I have to reverse polarity on one of the pickups. Cool
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Mike B



Joined: 24 Mar 2009
Posts: 1137
Location: Grand Prairie, Texas

PostPosted: Sat Sep 25, 2010 4:51 pm    Post subject: Reply with quote

That is f#*king awesome!!!! Have you thought about selling your custom wound pickups???
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Kregg



Joined: 22 Apr 2008
Posts: 3334
Location: Atlanta

PostPosted: Sat Sep 25, 2010 5:07 pm    Post subject: Reply with quote

Mike B wrote:
That is f#*king awesome!!!! Have you thought about selling your custom wound pickups???


Perhaps I'll make some for cigar box guys down the road ... but ... Hair Trigger was the first pickup I ever made. Still, I do have plans on wiring up more for some upcoming cigar box builds.
Plus, there are so many superb builders out there I'd hate to jump into the fray.
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