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Post subject: Shielded up strat, but need help to finish!
Posted: Tue Dec 21, 2010 3:08 pm
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Hmmmm, need to know how to wrap up my Strat project wiring.

Here's the scenario:

I shielded with copper tape inside control cavity + inside input jack cavity (I soldered the tape seams already, and the edges of tape extend slightly up and over guitar top as so to contact a fullsize fender aluminum pickguard shield and the jack cup.)

Issue is I already have a soldered up set of CTS pots with all connections made to switch and pickups (in basic strat configuration). Figured I'd drop this in body for the time being.

:?: SO question: will my shielding be inoperative, unless I run all grounds to a singular grounding point on the cavity shielding (I believe this is normal wiring scenario when doing shielding), instead of grounding to the pots?

and

If I install electronics as they currently are, will this cause any negative issues?

Thanks for any info!


Last edited by warmachine on Tue Dec 21, 2010 5:08 pm, edited 2 times in total.

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Post subject: Re: Shielded up strat, but need help to finish!
Posted: Tue Dec 21, 2010 5:01 pm
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p.s.
This is how my electronics are wired up. Basic strat style. Trem bridge ground goes to pot and all pots grounded one to the other.

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Post subject: Re: Shielded up strat, but need help to finish!
Posted: Fri Dec 24, 2010 10:14 am
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warmachine wrote:
...question: will my shielding be inoperative, unless I run all grounds to a singular grounding point on the cavity shielding (I believe this is normal wiring scenario when doing shielding), instead of grounding to the pots?


No.

warmachine wrote:
and

If I install electronics as they currently are, will this cause any negative issues?


No.

warmachine wrote:
Thanks for any info!


You're welcome.

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Post subject: Re: Shielded up strat, but need help to finish!
Posted: Wed Dec 29, 2010 12:49 am
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Not to be picky or rude but, the solder on the 2 volume pots surface seems a little weak. I had issues with this in the past, and found that taking some 400 grit sand paper and scraping with a knife will clean the backs of the pots for a good connection. Also, a 40 watt soldering iron will really get the pots to bond to the wire and solder.


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Post subject: Re: Shielded up strat, but need help to finish!
Posted: Wed Dec 29, 2010 1:03 am
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TTSC wrote:
Not to be picky or rude but, the solder on the 2 volume pots surface seems a little weak. I had issues with this in the past, and found that taking some 400 grit sand paper and scraping with a knife will clean the backs of the pots for a good connection. Also, a 40 watt soldering iron will really get the pots to bond to the wire and solder.


+1

Yeah, scuff it good with 400-grit or some crocus cloth. Brushing on some decent rosin flux is a good idea as well.

Arjay

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Post subject: Re: Shielded up strat, but need help to finish!
Posted: Thu Dec 30, 2010 12:49 pm
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I agree with the comments above, without good soldering your other efforts may be in vain.

Here's a copy/paste on tips for pot soldering from my amp build thread, hope it helps:

"I can give a quick tip here, soldering the back of pots can be tricky because they have usually have a film of some sort on them that doesn't like being soldered (solder won't stick) and also because they are large they act as a heat sink and suck all the heat from your soldering iron. Here's what works for me, I scoured a small area on the back of each pot with 400 Grit Wet/Dry paper to cut through the coating, then gave the area a wipe with Isopropanol Alcohol to really clean it and remove any trace of greasiness. Touch up the area with a Flux Pen. Then build a nice big blob of clean molten solder on your iron tip (A big blob gives you more heat mass) and plop that right onto the cleaned spot and hold it there to let the solder spread. That gives a good foundation to solder wires etc. to the back of the pot. Hope that info helps somebody."


Snowy


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Post subject: Re: Shielded up strat, but need help to finish!
Posted: Thu Dec 30, 2010 1:00 pm
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No457 Snowy wrote:
"I can give a quick tip here, soldering the back of pots can be tricky because they have usually have a film of some sort on them that doesn't like being soldered (solder won't stick) and also because they are large they act as a heat sink and suck all the heat from your soldering iron. Here's what works for me, I scoured a small area on the back of each pot with 400 Grit Wet/Dry paper to cut through the coating, then gave the area a wipe with Isopropanol Alcohol to really clean it and remove any trace of greasiness. Touch up the area with a Flux Pen. Then build a nice big blob of clean molten solder on your iron tip (A big blob gives you more heat mass) and plop that right onto the cleaned spot and hold it there to let the solder spread. That gives a good foundation to solder wires etc. to the back of the pot. Hope that info helps somebody."



+1, mate!

Slicker than a Vegemite sandwich.

:mrgreen:

Also, use good 60/40 rosin-core solder -- not that lead-free RoHS-compliant crap.

Arjay

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Post subject: Re: Shielded up strat, but need help to finish!
Posted: Thu Dec 30, 2010 1:24 pm
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Retroverbial wrote:
No457 Snowy wrote:
"I can give a quick tip here, soldering the back of pots can be tricky because they have usually have a film of some sort on them that doesn't like being soldered (solder won't stick) and also because they are large they act as a heat sink and suck all the heat from your soldering iron. Here's what works for me, I scoured a small area on the back of each pot with 400 Grit Wet/Dry paper to cut through the coating, then gave the area a wipe with Isopropanol Alcohol to really clean it and remove any trace of greasiness. Touch up the area with a Flux Pen. Then build a nice big blob of clean molten solder on your iron tip (A big blob gives you more heat mass) and plop that right onto the cleaned spot and hold it there to let the solder spread. That gives a good foundation to solder wires etc. to the back of the pot. Hope that info helps somebody."



+1, mate!

Slicker than a Vegemite sandwich.

:mrgreen:

Also, use good 60/40 rosin-core solder -- not that lead-free RoHS-compliant crap.

Arjay


LOl, :lol:

Yeah I love my Vegemite, been raised on the stuff since knee-high. 8)

Snowy


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Post subject: Re: Shielded up strat, but need help to finish!
Posted: Thu Dec 30, 2010 5:48 pm
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Martian wrote:
warmachine wrote:
...question: will my shielding be inoperative, unless I run all grounds to a singular grounding point on the cavity shielding (I believe this is normal wiring scenario when doing shielding), instead of grounding to the pots?



warmachine wrote:
Thanks for any info!


You're welcome.



I must have wired something wrong. I just reinstalled my pickguard and soldered my input jack. Strung up guitar but....no strings register on my digital tuner. :( So I put instrument cable in and measured other end with my multimeter. I get a 214.2 ohms on every pickup!! What is the likely culprit? I should have about 4.3 on the bridge, 6 at the mid, 9.9 at the neck.

:cry: This isnt good


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Post subject: Re: Shielded up strat, but need help to finish!
Posted: Fri Dec 31, 2010 7:15 am
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warmachine wrote:
I must have wired something wrong. I just reinstalled my pickguard and soldered my input jack. Strung up guitar but....no strings register on my digital tuner. :( So I put instrument cable in and measured other end with my multimeter. I get a 214.2 ohms on every pickup!! What is the likely culprit? I should have about 4.3 on the bridge, 6 at the mid, 9.9 at the neck.

:cry: This isnt good


You have a crossed wire or terminal in there somewhere, shorting out the whole circuit.

Upon closer examination, check the position of your capacitor too.

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Post subject: Re: Shielded up strat, but need help to finish!
Posted: Fri Dec 31, 2010 7:36 am
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Martian wrote:
warmachine wrote:
I must have wired something wrong. I just reinstalled my pickguard and soldered my input jack. Strung up guitar but....no strings register on my digital tuner. :( So I put instrument cable in and measured other end with my multimeter. I get a 214.2 ohms on every pickup!! What is the likely culprit? I should have about 4.3 on the bridge, 6 at the mid, 9.9 at the neck.

:cry: This isnt good


You have a crossed wire or terminal in there somewhere, shorting out the whole circuit.

Upon closer examination, check the position of your capacitor too.


Thanks for the response. Suspicion seems to rest on the hot lead from input jack going to middle lug of volume pot. I had to reheat and move ground wires on back of that pot for more clearance so my wiring would fall into the body routing. Another board member thinks I could have burned through insulation since the pot casing got hot, hence the short circuit. Not sure if there is another symptom to cause this, but that seems to make most sense.

Guess Ill know this Sunday when I get the soldering iron out. :wink:

Image


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Post subject: Re: Shielded up strat, but need help to finish!
Posted: Tue Jan 04, 2011 9:10 pm
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Martian wrote:
You have a crossed wire or terminal in there somewhere, shorting out the whole circuit.

Upon closer examination, check the position of your capacitor too.


Ended up being the switch. Most likely I overheated it with the soldering iron when desoldering / soldering. Fortunately I had a brand new genuine fender style 5-way switch lying around.

Thanks for all the great assistance! Everything is working now :D


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