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gtrguy
Senior Member
Username: gtrguy

Post Number: 543
Registered: 9-2004
Posted on Monday, November 19, 2012 - 11:18 am:   Edit Post

I have a used series one pickup with warped edges. I was wondering if anyone had ever encountered this and might have a fix for it. I get a good reading on it with my meter.

I am wondering if heating it a little at the edge and trying to straighten it might work or is there too much risk of messing up the internals?

I bought it as part of a set this way and it was described correctly before I bought it. The other PUPs are OK.

Thanks,
Dave_DSC7954.jpg _DSC7955.jpg
adriaan
Moderator
Username: adriaan

Post Number: 2996
Registered: 6-2002
Posted on Monday, November 19, 2012 - 12:13 pm:   Edit Post

They take some beating, don't they?
terryc
Senior Member
Username: terryc

Post Number: 2020
Registered: 11-2004
Posted on Monday, November 19, 2012 - 12:27 pm:   Edit Post

Correct if I am wrong but Alembic PU's are epoxy castings, I doubt if heating them will make them pliable enough to straighten them as epoxy is not a thermoplastic.
How the hell did they get in that condition????
afrobeat_fool
Senior Member
Username: afrobeat_fool

Post Number: 479
Registered: 7-2009
Posted on Monday, November 19, 2012 - 1:17 pm:   Edit Post

Hey, David. How are you enjoying all the rain? It's been a while. My thought is that you are going to have to shave the top of the casing so that it is level, and shim or epoxy the bottom till it is level. Mica will probably chime in soon. Good luck!


Nick
davehouck
Moderator
Username: davehouck

Post Number: 10944
Registered: 5-2002
Posted on Monday, November 19, 2012 - 3:22 pm:   Edit Post

Terry; it must have been a really smokin' bass solo.
jimmyj
Senior Member
Username: jimmyj

Post Number: 421
Registered: 8-2008
Posted on Monday, November 19, 2012 - 3:43 pm:   Edit Post

David,

That twist is a result of our Series mounting screw system. Possibly due to over-tightening or maybe just slow reshaping from years of torque, like old window glass, or my garden wall...

Two of our four mounting screws are below the pickup and two are above. These are adjusted together to raise, lower or tilt the pickup. (But not to twist the pickup!) Obviously the "below" screws were on the left corners in your pics.

As long as the pickup is working this is just cosmetic. If you wanted to you could swap corners and put the short screws under the right sides... Maybe in 30 years it will flatten itself back out?

Jimmy J
gtrguy
Senior Member
Username: gtrguy

Post Number: 544
Registered: 9-2004
Posted on Monday, November 19, 2012 - 5:31 pm:   Edit Post

In 30 years maybe I will become a better bass player :>) It does look like a mechanical torque flaw with those stress striations running through the edge, doesn't it. I could put it on my bearing press and see if applied force to the edge might reverse the problem, but that might break it. Ahhh, it's a hunch-back!! or hump-edge, or...
gtrguy
Senior Member
Username: gtrguy

Post Number: 545
Registered: 9-2004
Posted on Monday, November 19, 2012 - 5:33 pm:   Edit Post

BTW Nick, I hate this arfing rain.
mica
Moderator
Username: mica

Post Number: 7876
Registered: 6-2000
Posted on Monday, November 19, 2012 - 6:06 pm:   Edit Post

The pickups are cast in polyurethane, which is also not thermoplastic. It does however exhibit another property of many plastics: creep. That's what you're seeing in response to pressure, it slowly deforms. Jimmy is right that if you reverse the mounting, it will encourage the creep in the other direction. If you leave it unmounted, there is no motivation for it to return to where it was, since it's not elastic.

Those pickups look like they've had a rough life. The top picture it seems it's already been broken, the flange looks cracked on the left edge and the mounting screw hole looks less than complete.

You only have to tighten the screws to be snug - this is a good example of one of the reasons to not overtighten the mounting. But of course the good news is that they still function.
fc_spoiler
Senior Member
Username: fc_spoiler

Post Number: 1414
Registered: 5-2006
Posted on Monday, November 19, 2012 - 6:57 pm:   Edit Post

This is not from the set you got from me right?

Any luck with those electronics yet?
gtrguy
Senior Member
Username: gtrguy

Post Number: 546
Registered: 9-2004
Posted on Monday, November 19, 2012 - 10:42 pm:   Edit Post

Flip, it is another set I came across this summer. Yes, I am finally starting to work on the fretless project. Maybe by next spring it will be ready to play!

Thanks to everyone for their help!
Dave
flpete1uw
Intermediate Member
Username: flpete1uw

Post Number: 177
Registered: 11-2011
Posted on Friday, May 03, 2013 - 11:26 am:   Edit Post

Hello David,
Any luck on your Pickups? I have a similar issue with my Series Pickups, no broken corners just enough warp age to make the pickup height sit to high even when bottomed out.
Being this is a gradual thing could the pickups be slowly coxed back into shape by removing them putting X # of lbs of weight on them on a flat surface?
Pete
gtrguy
Senior Member
Username: gtrguy

Post Number: 610
Registered: 9-2004
Posted on Saturday, May 04, 2013 - 11:55 am:   Edit Post

Hi Pete,

I bet you are right. I have been too busy to do anything about it, but i should mount them in something and see if they will slowley resume the original shape.
flpete1uw
Intermediate Member
Username: flpete1uw

Post Number: 178
Registered: 11-2011
Posted on Saturday, May 04, 2013 - 6:30 pm:   Edit Post

David,
Excellent! If you do please let me know of any of your findings and Iíll do the same. I've been in the process of dialing in my 75 Series sound and going through the process of elimination. I'm thinking (Guessing more like it) that it might take a couple of weeks to settle in. Meanwhile I'll have the Mother ship do a check on the Mother board. This is all uncharted territory. The pickups as far as I can tell are fine.
Onwards,
Pete
gtrguy
Senior Member
Username: gtrguy

Post Number: 611
Registered: 9-2004
Posted on Saturday, May 04, 2013 - 7:50 pm:   Edit Post

I think they have a reasonable flat rate to replace the board if it needs it, if I remember right. I have another set of series pickups too that I will be trying out in my series one project one of these days. I want to see if either set will work well with the original hum center pickup that I can not remove from the bass (it is really glued in there). The other two original pickups were long gone when I got it.

http://alembic.com/club/messages/411/60995.html?1244649711
sonicus
Senior Member
Username: sonicus

Post Number: 2895
Registered: 5-2009
Posted on Saturday, May 04, 2013 - 8:01 pm:   Edit Post

That is the fretless from HEAVEN ! I love it _____
flpete1uw
Intermediate Member
Username: flpete1uw

Post Number: 180
Registered: 11-2011
Posted on Sunday, May 05, 2013 - 3:38 pm:   Edit Post

David,
Wow! That fretless is pretty. She should be put back and singing ASAP.
gtrguy
Senior Member
Username: gtrguy

Post Number: 612
Registered: 9-2004
Posted on Monday, May 06, 2013 - 10:34 am:   Edit Post

I know, and I have pretty much have all the parts, but I just have not had the time. Maybe this summer...

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