Input is F'd

anewdefguitarist

anewdefguitarist

New member
so our show last night was plagued with problems. to start, my beloved mesa finally has a sort've serious problem. first its been humming really bad lately, and thats finally given way to my chord needing to be perfectly rotated inside the amps input jack or else i only get a half power sound and HUGE crackling and pops. then during a song, all of a sudden the bass players bass just stops. completely no sound - nothing. so we get the DJ to play for awhile. bass player finally just runs home to see if he still has a backup bass. he does, comes back. THEN the drummer puts a hole in his snare head. so theres another break. all in all though, the crowd ended up being great, they hung around all night, and dug it. so i guess it ended up being a good show :friday:

so, im in NW ohio. i contacted glassman last night about my amp, as ive heard his work first hand (awesome). cool guy too! so anyways, calling glassman i guess. or if anyone has any suggestions on how to fix it myself? just thought id share all that....


oh, and im gonna be a daddy in about a week!!
 
Last edited:
Re: Input is F'd

Input jacks are all over the map when it some to the complexity of repairing them. Chassis-mounted jacks with wire leads to the PC board are the easiest; anybody who can solder can replace those.

Board-mounted jacks are trickier. If you have the same exact type of jack, it's fairly easy to change. You'll need a solder sucker and/or solder wick to remove the old solder and get the old jack out, then it's easy to solder the new one in. Same level of complexity as modding pedals.

Sometimes, you need to change the type of jack (though I don't think for a minute this is the case with your Mesa). For example, my son's bass practice amp (Fender "Rumble" series) recently started having problems similar to yours. The jacks were board-mounted crap, the their plastic locknut threads were stripped. SInce they no longer held securely in the chassis, any stree on the jack was transmitted to the solder joints on the board. So, I opened it up and replaed them with a couple of good old sturdy Switchcraft jacks. However, the required I cut away the area of the PC board where the old jacks had been. Then I had to trace the circuit on the PC board and figure out where to solder the new wires that to connet the jacks. Obviously, this type of mod takes a bit more knowledge of circuits soldering and circuits, and a schematic sure helps.

I don't recall what kind of jack Mesa uses, so it could be simple. If you're interested n the DIY approach, open it up and post a pic of the jacks from inside.

Or, Glassman is an excellent solution, too.
 
Re: Input is F'd

Sorry I'm late to the parade!

PM sent

Boogie jacks are pretty straight forward...most of them are chassis mounted Switchcraft jacks...easy in, easy out. The hum might be another issue, though they could be related if there's a ground issue at the input.

Either way I can fix it while you wait and show you what I find as I find it. Or you can go into the sound room and wail on one of my amps...your choice.
 
You must log in or register to reply here.
Back
Top