Jump to content
Why become a member? ×

Question John East J-tone 2 band EQ preamp in overwater J-Bass


RSV60
 Share

Recommended Posts

I bought an Overwater 4 string J bass from 2018, it got bartolini pickups with a J-tone 2 band EQ Preamp, but i found out that there has been

fumbled with the preamp. The Passive/Active knob has been altered into a kill switch. 

 

Has anybody a wiring diagram of the outlet jack and the Passive/active pull knob/switch?

 

Thx

Jack

Link to comment
Share on other sites

Posted (edited)

I figured out the wiring. The problem with the passive/active pull knob is ok now. played for a week fine.

But today,  in active position i only get an disturbed noise.

 

I noticed that the former owner has put some cardboard and tape on the electronics when i inspected it, so i removed that.

Now i have put back the tape and cardboard and i get a normal active tone.

 

So the tape and cardboard, were for putting pressure on the upper circuit board (with the " two plastic adjustable wheels")

 

The bottom circuit board has an epoxy layer at the bottum as standard, so i cannot check the connections.

Is there a way to fix this, or do i need to order a new preamp?

 

i feel disappointed, bought an expensive bass, which was told " hardly been played on"

electr23.jpg

electr22.jpg

Edited by RSV60
Link to comment
Share on other sites

First I would absolutely message John East, he is very helpful

 

Second I would be a little annoyed if I bought a decent bass to find that the electrics had been bodged as appears to be the case, but.....

 

It might not have been the seller who did this, on which basis the seller might be completely unaware of it. I'm one of those people who but a bass and within days pretty much take it apart to check it all over, but lots of people aren't, quite reasonably they just play it, and it it plays OK, everything's OK. 

 

Either way, might be worth having a chat with them also, good luck 👍

Link to comment
Share on other sites

If there needs to be a piece of card pushing against something for it to make a good contact then tt's probably just a solder joint that needs reflowing. Take the card out and lightly push against different components to see what makes a difference, starting with that capacitor then the pickup trim pots as they would be most affected by the card/tape bodge.

 

Probably still worth messaging John East to see what he says.

  • Like 1
Link to comment
Share on other sites

Thanks for your reply, i think John is busy at the moment🙃 Maybe the preamp is too old? However i could not wait so I have made the 4 connections of the circuit with the two pots liquid again with a soldering iron. It sounds OK for now. So maybe i fixed it (although i could not find any bad solder joints).

 

If it turns bad again, maybe the next step is a new preamp 😔

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...