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Post subject: Re: Bridge pickup died after a string change. Why?
Posted: Sun Oct 14, 2018 7:56 pm
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Retroverbial wrote:
Further evidence that Leo got it *RIGHT THE FIRST TIME* and all subsequent "improvements" to the Stratocaster are nothing more than blasphemous bullshit!
Yep.
And it's easier to wire everything up on the plate shield then transfer it to the PG.

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Post subject: Re: Bridge pickup died after a string change. Why?
Posted: Mon Oct 22, 2018 11:48 am
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Hey guys back again with the same problem, but this time I have some new evidence. I was jamming out with some buddies over the weekend and I was playing on the bridge position. Up till then, everything was working fine. So I'm messing with the volume and tone knobs throughout the jam session and at one point I turn my bridge tone knob down from full to midway, play a little in the bridge position, switch to my neck position, then back to the bridge, and no sound! So I finish up the jam not using the bridge position then I start to inspect.

So I switch to the bridge position, no sound. When the tone knob is off to maybe around 6, there's no sound coming out of the amp. Past that, the amp produces sound, but very little. Similar to how it was behaving when I posted last time.

So with that evidence and past suggestions, this may look like a switch problem? In that case, would a new switch be the only thing that I would need to replace?

I doubt it's the Tone knob, because on the 2nd position (bridge+middle), the tone knob works normally. So guys, any thoughts?


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Post subject: Re: Bridge pickup died after a string change. Why?
Posted: Mon Oct 22, 2018 1:14 pm
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The “first time”? You mean those awful intonation screws on the pup side of the saddles? Or any of the myriad changes Leo made over the years? What year would you consider it was finally “right”?

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Post subject: Re: Bridge pickup died after a string change. Why?
Posted: Mon Oct 22, 2018 2:00 pm
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I would re-solder "all" the connections for the bridge pup, 2nd tone pot and reflow all the ground solder points.
I would also spray clean all the pot's, shutting down at 6 would indicate a dirty/bad contact or a faulty pot.
If that didn't fix it I would replace the #2 tone pot & capacitor then recheck, still nothing replace the switch, still nothing replace the pup.
Does your strat have a star ground?
Does your strat have the common pot body ground, between T2,T1 and the volume pot?


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Post subject: Re: Bridge pickup died after a string change. Why?
Posted: Mon Oct 22, 2018 7:13 pm
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sfceric64 wrote:
I would also spray clean all the pot's, shutting down at 6 would indicate a dirty/bad contact or a faulty pot.

But what doesn't make sense is if a tone pot is open, it simply won't work.
It would need to short to ground to kill the output.

I would suspect that the leg of the tone capacitor that's connected to the tone pot is shorting to the pot case... but that would kill the output from all pickups.

Does the output behave the same whether in the bridge or the bridge-middle positions? If the bridge-middle sounds the same as the middle-only, that still points to an open bridge pickup.

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Post subject: Re: Bridge pickup died after a string change. Why?
Posted: Mon Oct 22, 2018 10:14 pm
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CB91710 wrote:
sfceric64 wrote:
I would also spray clean all the pot's, shutting down at 6 would indicate a dirty/bad contact or a faulty pot.

But what doesn't make sense is if a tone pot is open, it simply won't work.
It would need to short to ground to kill the output.

I would suspect that the leg of the tone capacitor that's connected to the tone pot is shorting to the pot case... but that would kill the output from all pickups.

Does the output behave the same whether in the bridge or the bridge-middle positions? If the bridge-middle sounds the same as the middle-only, that still points to an open bridge pickup.

I see what your saying but if the cap was grounded on the outside of the pot it would be grounded "all the time". The pots inner trace may be lifting at 6 or less and making contact on the inner pot or ground lug "intermittent".
A picture from the op of his pickguard would have made it possible to see maybe what is going on w/ his wiring.


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Post subject: Re: Bridge pickup died after a string change. Why?
Posted: Mon Oct 22, 2018 10:37 pm
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sfceric64 wrote:
I see what your saying but if the cap was grounded on the outside of the pot it would be grounded "all the time".

Ya... basically a 2nd volume pot.

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Post subject: Re: Bridge pickup died after a string change. Why?
Posted: Mon Oct 22, 2018 11:44 pm
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Now, I'm absolutely no electrical wizzard…
But the cap is on T1 (neck), not on T2 (mid&bridge), if this is a 2006 AmSeries, normal wiring Strat.
And the bridge pickup worked after the corrections, although not for long.
So (ruling out the cap & pickup defects) to my simple mind, still seems like a switch issue.

BTW, @encoreblade; is the sound OK on Pos2, bridge+middle pickups?


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Post subject: Re: Bridge pickup died after a string change. Why?
Posted: Tue Oct 23, 2018 12:41 am
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Simple ohms checking should easily resolve this issue.
I have had some pickups that work one moment then not then with pressure work again.
At this stage the true issue is unknown and I appreciate that

An easy test if you cant or dont know how to use a meter is just swap the mid and bridge on the switch.
After extensive testing and remembering the switch positions for the pus has now changed if you still lose the bridge then it is probably the pickup if you lose the mid then the issue is elsewhere. If you lose neither then maybe you have corrected a dry joint. :D


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Post subject: Re: Bridge pickup died after a string change. Why?
Posted: Tue Oct 23, 2018 5:26 am
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jmattis wrote:
Now, I'm absolutely no electrical wizzard…
But the cap is on T1 (neck), not on T2 (mid&bridge), if this is a 2006 AmSeries, normal wiring Strat.

Yep... it's on T1, but the non-grounded leg runs from T2 to T1 then to the cap.
That's why I discounted the cap or tone pots before, more than one P/U would be impacted, and the tone circuit electrically can not cause any pickup to show "open"
The only thing that can cause an "open" is a bad solder joint, switch, or pickup.
Solder joints between the jack and volume pot are ruled out because only one pickup is impacted AND the "open" reading matches the 250k volume pot.

I still suspect the input (pickup) side of the switch contacts and would first resolder, then replace the switch.

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Post subject: Re: Bridge pickup died after a string change. Why?
Posted: Fri Jan 11, 2019 11:39 am
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Hi guys sorry I didn't reply back, but I came back to these Fender forums for some other problems regarding my Fender bass and amp, (I've made topics about them and will list them at the end in case you guys might be able to help me out with those too), and I just realized I hadn't concluded this issue. So I ended up resoldering all the wires connecting to the switch and that seemed to solve the issue. I did this around mid-November and haven't had a problem since. Even had a light Christmas jam without a problem. Thanks to everyone that responded and helped out. I appreciate all your help.

The other problems I mentioned earlier if you guys would like to provide some input.
https://forums.fender.com/viewtopic.php?f=11&t=112698
https://forums.fender.com/viewtopic.php?f=23&t=112702


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Post subject: Re: Bridge pickup died after a string change. Why?
Posted: Fri Jan 11, 2019 12:46 pm
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Thanks for updating the outcome - everyone loves happy endings. :wink:

On your Jag Bass, if you have a buzz that stops when you touch the strings, that tells that the grounding works. So I'll guess the buzz is most likely some electrical interference. Might get somewhat better with shielding, but first check what electrical appliance could be the cause - turn gidgets off one by one. Oh, and the first check: you are using a grounded wall outlet for the amp, right?


On the Rumble amp, the symptoms would suggest that some component heats up, cuts the power, cools and works again. Like I said, my electrical knowledge is way limited, so I won't even start guessing what part that could be...


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