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The Acoustic Club

I have my 220 rig at my buddy's practice studio and it's started making squelching background noises and picking up radio interference..... Do you think I need to take the amp into the shop?

Your description makes it sound like an unshielded instrument cable. If the 220 is making these noises with nothing plugged into it, then yes it's time to see a technician.
 
Hey guys, I need some help. I have my 220 rig at my buddy's practice studio and it's started making squelching background noises and picking up radio interference.
I didn't have this problem in other locations. His house is new, so the wiring is grounded, I'm sure, and the other amps in the room seem ok, although allot of single coil hum, I've noticed.
Do you think I need to take the amp into the shop?
Thanks!
Honestly if you only have this at one location, I be hesitant to take it to a shop unless it starts happening elsewhere.
 
It makes the same noises weather there is something plugged in or not.

I assume it's not sensitive to vibration (i.e. a good whack on the top). Still, it would hurt to exercise the 1/4" jacks on the front and back of the chassis, particularly the preamp out/power amp in jacks. They're known to oxidize over time and become intermittent. Use a instrument cable plug and jerk it in and out of each jack vigorously a few times to see if that makes any difference.

EDIT: "wouldn't hurt"
 
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I assume it's not sensitive to vibration (i.e. a good whack on the top). Still, it would hurt to exercise the 1/4" jacks on the front and back of the chassis, particularly the preamp out/power amp in jacks. They're known to oxidize over time and become intermittent. Use a instrument cable plug and jerk it in and out of each jack vigorously a few times to see if that makes any difference.

EDIT: "wouldn't hurt"
I'm going to try your recommendations, and also take my Fishman power strip over there. My buddy has the 220 plugged into a cheapo power strip and I've had problems with those things in the past. If that doesn't work, I'll try another location before getting it worked on.
Thanks!
 
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Nice rig man.

Can someone explain the difference between a 140 and 150b? I read that the 140 is basically a 150 without the effects (tremelo, reverb), but i read the same about a 150b. And what is the difference between the two channels of these amps?
Im not an expert but I believe the 150b was 1st generation and the b stood for bass. The 2nd generation 150 was an all purpose amp while the 140 was sold as a bass amp. The 150 came with a 105 cab with 4x12 while the 140 came with a 106 cab with 2x15. Still pretty much the same amp.
 
So the 150b became a 140, while the 150 kept the same name going from the blue front to the black and blue stripes. So this would mean the 140 and 150b are very similar. Still my question remains, whats the different between the two channels? For the 150 the right channel is linked to the effects, while for the 140/150b there are no effects, so why the two channels then?
 
Right, the only difference between the 140 and 150b is cosmetic. On those two models there was no difference in the two preamp channels, the same printed circuit board was used for both. I don't think there was ever any particular reason for it other than allowing for two instruments (i.e. guitar and bass) to be amplified with a single head and cabinet.