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 Post subject: Re: help with comparing pickup output
 Post Posted: Wed Oct 21, 2015 5:39 am 
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Joined: Sun Oct 08, 2006 6:07 am
Posts: 3828
Zurdo, here is a link to the factory schematic so you can compare your original '66 control plate. You may be misinformed about what the fifth knob does. It is not a balance control in the same sense as a home stereo or an active pickup setup that pans from one pickup to another. It is an auxiliary volume control on the neck pickup (or neck + middle on 3-pickup instruments) that facilitates a player setting the overall volume of the neck pickup to match the bridge pickup so there is an equal volume, or "balance" when selecting which pickup(s) to play.

http://www.rickenbacker.com/pdfs/19502.pdf


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 Post subject: Re: help with comparing pickup output
 Post Posted: Thu Oct 22, 2015 11:01 am 
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Joined: Thu Jun 04, 2009 3:15 am
Posts: 674
Location: Florida
what? I never knew that !! Thanks! ( I saved the pdf but the schematic shows only two pickups? )

here's pictures of the original control plate, without the pickups or the output jacks connected. (just the control plate)


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 Post subject: Re: help with comparing pickup output
 Post Posted: Thu Oct 22, 2015 3:37 pm 
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Joined: Sat Nov 22, 2008 6:58 am
Posts: 84
Location: Michigan
Very smart to save your original control plate. Lots of people would have lost it or sold it.

I usually save the original parts to vintage instruments if possible, when I have to replace something.


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 Post subject: Re: help with comparing pickup output
 Post Posted: Fri Oct 23, 2015 3:22 am 
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Joined: Thu Jun 04, 2009 3:15 am
Posts: 674
Location: Florida
Steve, I always save all parts no matter what it is.

I want to know what are those two giant blue things, and what they do.

there is another smaller capacitor or resistor below those two, light green in color, seen in the picture below.


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 Post subject: Re: help with comparing pickup output
 Post Posted: Sat Oct 24, 2015 4:16 am 
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Joined: Sat Nov 22, 2008 6:58 am
Posts: 84
Location: Michigan
All three are capacitors for tone shaping. A capacitor will only let high frequencies pass through, and will block the low frequencies.

So when you roll off your tone control, the capacitor allows the high frequency part of the signal to bleed to ground, giving a less bright sound. These are the two blue capacitors, one for bass tone and one for treble tone.

The green capacitor is used as a filter to block low frequencies on the bridge pickup only, to give a brighter sound. This is not adjustable, it is not part of the tone control knobs. But if it is wired to a push/pull pot (the vintage tone circuit) it can be bypassed.

I'm sure iiipopes will be along for a very thorough explanation!


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