Couple of questions on pots etc. - Jemsite
Pickups & wiring Discussion about pickup types, replacements, recomendations, switching, wiring diagrams and sustainer systems for ANY guitar, JEMs included.

LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 08-12-2007, 06:39 AM Thread Starter
Join Date: Jun 2007
Location: United Kingdom (North East)
Posts: 20
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?
Cyrix is offline  
Sponsored Links
post #2 of 3 (permalink) Old 08-12-2007, 09:39 AM
Join Date: Feb 2001
Location: Oxford, UK
Posts: 1,514
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

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

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

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

Devo is offline  
post #3 of 3 (permalink) Old 08-12-2007, 01:06 PM Thread Starter
Join Date: Jun 2007
Location: United Kingdom (North East)
Posts: 20
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!
Cyrix is offline  

high pass filter

Quick Reply

Register Now

In order to be able to post messages on the Jemsite forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address

IMPORTANT: You will be required to activate your account so please ensure that your email address is correct.

If you do not receive your activation check your spam folder before using the CONTACT US form (at the bottom right of each page).

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
A couple of tremolo questions... PacificaJonny Tech: Setup, Repairs and Mods 6 05-03-2006 12:26 PM
A couple questions concerning my rg350ex Jebus Other Ibanez Guitars (including Premiums) 1 05-04-2005 02:39 PM
JEM 2K DNA, Advice, a couple questions? PerpetualBurn JEM and Universe Guitars 115 04-02-2004 09:07 AM
Couple of questions on the RG421 DKnight Tech: Setup, Repairs and Mods 8 04-15-2003 10:52 AM
My Mystery Ibanez - couple questions Scott 74 Other 6-string Guitars (non-Ibanez brand) 9 09-18-2001 07:16 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome