Thread: 9 pin jack for Preamp

Are you talking about something like this:Neutrik NMJ6HC-S or this Rean NYS212?

Both are 6 contact TRS 1/4" insulated panel mount jacks.

The original on those was 8 pins plus a chassis ground wasn't it? If you're going to cut two pins and a ground I guess I'd want to know what you're going to do away with. Was it just a combo jack? Do you have a pic of the non functional jack?

Yes it looks alittle like both and you are right the ground is on the top The only schematic I have seen that looks like it is the old Marshall 9001 preamp.Its a pretty good preamp for Clean and Crunch The other Hot channel I dont use to much.I do not know how to put a picture on this site.My girlfriend might be able to do it or send one over the phone....

Originally Posted by TheJackAttack

The original on those was 8 pins plus a chassis ground wasn't it? If you're going to cut two pins and a ground I guess I'd want to know what you're going to do away with. Was it just a combo jack? Do you have a pic of the non functional jack?

I do not know what you mean about cutting two pins and a ground ? all I want to do is replace it.But I cant find one anywhere.It is just a Guitar preamp and the threads holding the nut to the front pannel broke.

Are they solder tabs (for soldering wires to directly), or does this jack mount onto a circuit board? I can't conceive of any reason you need a 8-pin + ground for a guitar jack. We'll assume the jack is shielded from the chassis for a reason.


Go to: Neutrik's / Rean website and find which jack you think is correct.

Then visit: Full Compass


Plan B: desolder the jack from Hot channel and move it over.

Originally Posted by Bob Barcus

I do not know what you mean about cutting two pins and a ground ? all I want to do is replace it.But I cant find one anywhere.It is just a Guitar preamp and the threads holding the nut to the front pannel broke.

Your topic says 9-pin jack. You asked if you could get by with a six pin jack. I guess I'm wondering what is connected to all the pins. A six pin non-combo jack is often a switching jack. A nine pin jack is often a combo switching jack. I think I would completely remove the old jack and go to the link DVDHawk gave you. Really paw through the Neutrik site as they do really good pictures. A metal jack would probably alleviate the concern over breaking plastic threads.

The Jack is Not PCB mounted,and it is All plastic so it doesn't touch the front pannel The ground connects to a lug on top of the jack It switchs between 2 channels...1, Clean,2,Crunch and 3,Lead ,4,Hot..

The only 9 pin I have seen was on ebay but its a PCB mount for Fender amps made in 1989-92 and the theard part is not long enough.