OBP-1 install

[shrigg]

I'm installing an Aguilar OBP-1 preamp in my Mottola 6 string Jazz.

Question, should I leave the "5032" cap in between the blend and the volume controls or take it out when using this active Pre?

Here is the project:

[line6man]

That's 503Z, not 5032.
503Z indicates a 0.05uF capacitor.

I can't quite make out how it is wired in your picture. Where do the leads connect to?

[shrigg]

It's on the RH top leg of the blend pot and I connected it to the RH leg of the volume pot. Now I have no output, just low radio station signal comes out when plugged into the amp. I think maybe I need to just take this to my tech.

[line6man]

Originally Posted by shrigg

It's on the RH top leg of the blend pot and I connected it to the RH leg of the volume pot. Now I have no output, just low radio station signal comes out when plugged into the amp. I think maybe I need to just take this to my tech.

RH?

[shrigg]

right hand...

[line6man]

I'm still not fully following you, but I would remove it anyways.

[shrigg]

I'm referring to the schematic "right hand" leg of the pot when viewed from the rear. You know how there's usually three legs, when they are illustrated right side up the legs could be referred to as left center and right. I am talking about the right leg.

Either way I'll remove the cap but I dont think it's the problem that would cause NO output.... Something else is wrong, dunno what.

[shrigg]

I thought I'd be able to drop the OBP-1 into the existing Volume + blend pot wiring... Not quite that simple I guess

[line6man]

Originally Posted by shrigg

I thought I'd be able to drop the OBP-1 into the existing Volume + blend pot wiring... Not quite that simple I guess

You should be able to do that just fine.

Why is it not that simple?

[shrigg]

I'm not sure! I'm pretty much a wiring noob but I've wired pickups before. The blend pot is a new thing for me. It worked before so it oughtta work now...

Here's a better overview (the white to blue from the vol pot center leg goes to the OBP-1)




Okay, BASIC question time:

Is the leg that I have all the blacks soldered to the ground on this stereo jack? The far leg is getting the 9V black lead, the opposite leg is getting the green from the OBP-1 as per the schematic.

[line6man]

Originally Posted by shrigg

I'm not sure! I'm pretty much a wiring noob but I've wired pickups before.

Here's a better overview:




Okay, BASIC question time:

Is the leg that I have all the blacks soldered to the ground on this stereo jack? The far leg is getting the 9V black lead, the opposite leg is getting the green from the OBP-1 as per the schematic.

Yes, that lead appears to be the sleeve terminal, so that's where you connect the grounds.

The solder joint on that terminal is terrible though, you really need to re solder it nicely, otherwise it looks like you could pretty much just give the leads a firm tug and the joint would break.

[shrigg]

Hey! I now have output!! The output of the blend pot was grounded in the old circuit. Pulled that and VOILA.

Thanks for your support!