EMG bods - I need your wisdom.

[Owen]

I have a pair of 40J soapbars with a BTC circuit. I am about to have them put them into a new bass but would like to have passive tone control in as well. I am aware that the treble control will give me an element of HF control, but I like what a passive roll off does (I had one on a set of EMGs with no active EQ) so fancy having one put in while I am at it. I am drilling a new body so now is the time to decide how it will all be cut open.

Do I have to use an EMG pot? If so which one? Where does it go?

So many ideas, so little ability to realise them Obviously I will not be doing anything with a soldering iron, they hurt me.

[hubrad]

Yup, you can even install a kind of active passive switch, except in this case it would refer to the EQ.
You need the usual 'passive' tone pot as per EMG, i.e. 25k with tone capacitor.

[3below]

As far as I can ascertain the EMG 40J is an active set (website says they are J type in larger case) . I think you could achieve a passive tone control in addition to the BTC setup. It would need to be the 25K pot. I have one bass with EMG Js and find the passive 25K tone pot works remarkably well (usually I just run my basses with tone control at full but with with the EMG set-up I actually use the tone control).

Now answered above while I was typing

Edited April 26, 2015 by 3below

[verb]

You can install a switch to allow active/passive EQ or have the passive tone pot working all the time.
A passive tone control is a bleed off to earth,so is connected between the hot signal wire and earth.

[Owen]

Thanks everyone. I love this place

[Owen]

Sorry for being dozy.

One of these?

http://www.ebay.co.uk/itm/231543202368?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

[BassBod]

If you are using two pickups and a circuit, I'd be thinking of using two 9v batteries as well...just a thought.

[Owen]

I have run the system I am using at 18V and must admit that I did not feel the benefit, but for space reasons I will be using the 2 x A23 12v trick

[BassBod]

Interesting...I'm not that well informed on that one...mmmm. I've used the 18v with two J's and an Aguilar circuit and did hear a bit more oomph, but it wasn't a huge difference. I did see that they are now selling a pedal box so you can remotely power everything using a stereo cable. Looked like a low tech version of the Alembic Series idea, but without the mains connection. I'm tempted to try it in my Bravewood jazz, with JVx's and an Aguilar OPB1.

[hubrad]

[quote name='owen' timestamp='1430209889' post='2758852']
Sorry for being dozy.

One of these?

[url="http://www.ebay.co.uk/itm/231543202368?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT"]http://www.ebay.co.u...K%3AMEBIDX%3AIT[/url]
[/quote]
That would work, but the long shaft might get in the way unless you use either a spacer or both nuts on the one shaft.
The standard length one is thus: http://www.ebay.co.uk/itm/One-Genuine-USA-EMG-Short-Brass-Split-Shaft-25K-Volume-Tone-Potentiometer-Pot-/161595674719?pt=LH_DefaultDomain_15&hash=item259fda505f
This one is the solderless version: http://www.ebay.co.uk/itm/EMG-25K-Tone-Pot-with-short-split-shaft-Cables-4-pin-Solderless/370724797133?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D30111%26meid%3D888d45c01a4442b6a657f79ac59557fa%26pid%3D100005%26rk%3D3%26rkt%3D3%26sd%3D321727835981&rt=nc
and I just saw they now do a 25K with push-pull switch (ideal for the active-passive EQ): http://www.ebay.co.uk/itm/EMG-25K-Push-Pull-Pot-with-short-split-shaft-Cables-6-pin-Solderless-/371176804444?pt=LH_DefaultDomain_3&hash=item566bdc905c
Running at a higher voltage doesn't so much raise the volume as the headroom. Just that bit clearer, especially if you play hard.

[hubrad]

What manner of bass are you thinking of for this?
It occurs to me that the standard shaft is spot on for plate mounting or a thinner top, while those longer shafts are probably ideal for more of a thicker range of tops.

[Owen]

[quote name='BassBod' timestamp='1430212957' post='2758901']
Bravewood jazz
[/quote]

Mmmmmmmmmmmmm

[Owen]

[quote name='hubrad' timestamp='1430213200' post='2758905']
What manner of bass are you thinking of for this?
[/quote]

It will be going into this

http://basschat.co.uk/topic/128791-shukfellow/

so the longer shaft should be fine. Thanks again everyone.