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Pickups & wiring Discussion about pickup types, replacements, recomendations, switching, wiring diagrams and sustainer systems for ANY guitar, JEMs included.

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Old 08-12-2007, 06:39 AM
Cyrix  is offline
 
Join Date: Jun 2007
Location: United Kingdom (North East)
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Couple of questions on pots etc.


Ive basically got a bitza 777, the wirings been played around with a fair amount at some stage, volume capicitor melted, 5-way had that much heat put thru it the fingers inside the switch have distorted! looks like Stevie Wonder was let loose with a roll of solder and a blowtorch.

Anyhow, most of is has been junked now.

Two questions though.

1. For the volume capacitor I need a 0.047uf (50v) ?

2. The tone pot (Which is the only bit thats servicable!) is stamped on the rear 76k ? with a 223k capacitor. Surely the value of the pot isn't 76k?
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Old 08-12-2007, 09:39 AM
Devo  is offline
 
Join Date: Feb 2001
Location: Oxford, UK
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Re: Couple of questions on pots etc.


Hey man,

0.047uF is too high a capacitance for a high pass filter or for use as a treble bleed capacitor... you want something more in the 1nf or less .. the standard is to use a 330pf capacitor but a 390 or 220 wil not be noticably different... Though I dont believe it makes any difference ... you hear that it is alway best to go for the capacitor with the biggest dialectric.. so I would reccommend going for something like this

http://www.banzaieffects.com/Silver-...-pr-17810.html

They are expensive but you wont get a better quality cap for a high pass filter.

As far as the tone control goes all Ibanez use 0.022uf caps ... the in fashion posh cap to go for at the moment is a the Sprague metallised film cap... but these are quite pricey

http://www.banzaieffects.com/Orange-...-pr-15609.html

You could go for a Japanese cap to be more authentic... like this

http://www.banzaieffects.com/Xicon-G...-pr-23970.html

Tis much cheaper and wont make any difference ot the tone (to us mere mortals maybe EJ could tell)

The pot definatly isnt 76K your right... its a 500k log pot.. I dont know what the significance of the number on the back is ... I dont know who Ibanez current pot supplier is but its probably Alpha...

Hope this is of some help

Steve
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Old 08-12-2007, 01:06 PM
Cyrix  is offline
 
Join Date: Jun 2007
Location: United Kingdom (North East)
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Re: Couple of questions on pots etc.


Kind of hoped you would reply, looked back thru a load of old capacitor related posts and you seemed to talk the most sense, so many people quoting different capacitor values etc.

I have taken your advice and ordered the Caps suggested

Cheers for the help I agree with what you say about the different between caps being un-noticeable, certainly not to the human ear anyhow!
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