Mesa Boogie studio preamp input jack help needed.

[masher]

I bought a Studio Preamp that needs a little help with the input jack.The guy I got it from had work done to the jack, and in the process they removed the 1M resistor.I caught this last night looking around the Boogie Board and found a pic with the resistor on the jack, I looked at the schematic and it shows a 1M to ground.
Now here's my problem, I don't know what kind of resistor I will need, I looked on mouser, and there are a lot in the 1M category.I don't know anything about wattage or anything.
Would these be ok? http://www.amazon.com/KOA-Speer-Thru-Ho ... B002H12OTK
I also don't know what pins on the jack the resistor needs to be connected to.
Any help would be appreciated.

here's what mine looks like
[IMG:800:600]http://i3.photobucket.com/albums/y89/mu ... 094656.jpg[/img]

here's the schematic.It's r251 1M the leftmost resistor.
[IMG:800:491]http://i3.photobucket.com/albums/y89/mu ... tudio3.gif[/img]

here's the one with the resistor,it's the little blue one at the far end behind the zip tie.
[IMG:800:600]http://i3.photobucket.com/albums/y89/mu ... cinput.jpg[/img]

[Reeltarded]

1M, doesn't matter about wattage. Use 1/2 watters.

It's said that CCs sound best for most amps there, so much that NOS are 'upgrades' on amps from good makers.

Test your jack. The resistor rides between the tip and sleeve. Bet you didn't expect that.

[xtian]

Yes, those resistors are fine for this purpose. You want to connect one end of the 1M resistor to signal (the tip of your guitar cable is signal) and the other to ground (ring). Looks like your input jack is the type that shorts the signal to ground when nothing is plugged in. So if you connect the ground end of the resistor to one of these pins, you want to make sure it's the one that's always grounded, whether a cable is plugged in or not.

[masher]

Thanks for the help guys,sorry to be such a simpleton ,but let me just get this straight. The large red wire(new wire that was added during repair) is connected to the braid within the grey wire, I'm believe that it is the ground between the rear and front input jack.
Can I go from there to the signal pin?, some of the other pins up top have remnants of solder on them, do any of those get attached to the resistor leg?, if so does it matter what side of the resistor they're on?.
thanks.
Would I be better off getting a carbon comp instead?.

[Reeltarded]

Just use what you have, or get... and change it later to see what you think. It won't matter too much in the grand scheme.

I will go back to look at the pic again, but if you look close at the jack with a cable plugged in you will see that:

the tip of the plug touches the hot pin on the jack. (+ signal)
and

the sleeve of the plug touches the jack ring. (- ground)

Wire it up with the resistor from the tab with the shield, to the tab with the signal wire (clear) right next to it.

Looks like the red wire is probably the shorting wire for when you pull the plug out.

[masher]

Thanks Reel !, looking at the jack from above it looks like there was a connection from the two top pins.Should I bring them to the clear?.
Any idea why someone would remove the resistor?.

top photo
[IMG:800:600]http://i3.photobucket.com/albums/y89/mu ... 1112-1.jpg[/img]

other angle
[IMG:800:600]http://i3.photobucket.com/albums/y89/mu ... 094656.jpg[/img]

[Reeltarded]

I don't know that the jack is original to the amp, I have no idea what those pins are. It looks like a loop out/return jack from something else, or it came from some amp where it was one of two paralleled inputs, or some other sci-fi arrangement I can't imagine without coffee.

You need a simple multimeter. That wire is a terrifying mess there, it needs a nice clean termination to a better jack.

Someone just kept soldering til they got a signal? Mmm..