Tube amp hum

[Jim Marquard]

Hi all,

I am using a Fender Pro Junior for recording guitar with "live air." The problem? I am getting a bunch of hum out of the amp. I can have the volume on the amp turned all the way down and no cable or guitar plugged into the amp and I still get this hum. Though it is not so loud that it kills the guitar sound, I certainly don't want to record it. Anyway, what do you think the cause may be? This is such a simple amp, one volume and one tone, two preamp tubes, two power amp tubes. I bought the amp "new", that is never owned but about 3 years old so I got a decent price for it ($280). I didn't notice the hum at first. It showed up about a month after I bought it. If you need any other info, just ask.

Tahnks for any help. Peace, Jim

 

[Cloneboy Studio]

Make sure the amp is plugged into a grounded, hum free power source. Get a power conditioner.

 

[Jim Marquard]

I have had the amp in two different apartment buildings and still, I get hum. And it is hum. Granted, both buildings are fairly old, at least 40 years so I will check the ground.

Peace, Jim

 

[Chill]

Have you tried subbing out the preamp or power tubes with known good tubes?