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Model 4001 Wiring Landmarks

Posted: Tue May 29, 2001 10:13 am
by admin
Mark: I thought that this photo taken by Greg Shadoan (I hope you don't mind Greg) would be a nice reference for discussion about capacitors, pots and the like. Please take us on a guided tour.
Image

Posted: Tue May 29, 2001 11:20 am
by markthemd
The aqualung tanks are really .047mfd 100Volt capacitors.
These were used in the amps and carried over to the guitars .

The pots are CTS ,cloth wire ,Switchcraft brand switch,Columbia Flex life grey cable .

The .0047 mfd cap is under the lower blue cap,this is the crisp -O- sound capacitor.

Posted: Tue May 29, 2001 5:22 pm
by jnbass
Mark-I don't need the ROS option & my normal jack is inconsistently shorting (?) out. how do I rewire this jack so I can bypass the shorting mechanism, and prevent my amp from popping a voicecoil?

Posted: Wed May 30, 2001 3:58 am
by markthemd
I do this ALL the time ,I have posted this before ,but will answer it again;

You can do this two ways.

1-remove all the wires that go to the jacks and reuse them or go buy two new mono Switchcraft jacks .

I also install a .0047mfd cap on the hot of the stereo /Rick-O-Sound jack and run that to the hot of the mono /standard jack.

Then connect the grounds and hook up a piece of the shielded cable to the mono/standard jack.

Connect that to the bridge pickup volume control and solder a jumper wire from that same lug to the neck pickup volume control.

This gives you mono 100% of the time and the Rick-O-Sound jack has the vintage crisp sound ,while the standard /mono jack has the "FULL" tone .

That way you pick,Geddy or Chris in your sound.

2-unsolder all the wire from the two stock jacks and wire as dual mono jacks .You could reuse both shielded leads .
But the jumper wire needs to be installed to connect the hot lugs that the jack leads go to.

Posted: Wed May 30, 2001 9:34 pm
by jnbass
Mark-once again, much thanks for the (free) service you provide!

Re: Model 4001 Wiring Landmarks

Posted: Sun Jun 19, 2011 9:04 pm
by tracy
Did anyone make note of the catalog number of the Columbia flexlife? It's printed right on the grey jacket and should be a four digit number beginning with 13__. Thanks.