hypernovablast
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- Joined
- Nov 21, 2009
- Messages
- 6
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I have a 1989 Randall RGT100 head that is picking up two FM radio stations. I can hear both stations coming through at the same time. One is a rock station at 98.5 and the other is a country station higher in frequency at 103 or 105. This happens with no guitar or guitar cable plugged in. Adjusting amplifier volume does not change the radio interference volume.
I've tried several things to check this problem:
- Multiple cables connecting head to cabinet
- Plugging into outlets in other rooms
- Plugged amp into power conditioner (Panamax M4300-PM)
- Checked outlets with outlet checker and they check out okay
- Disassembled amp and checked power cord connections which seem fine
I can change the radio reception by moving the power cord around. If I grab on to the cord in the back of the amp near where it connects, the rock station almost goes away but I can hear the country station better. I have even gone so far as to try shielding the power cord with grounded tin foil since it seems to be acting as an antenna. I recently had the amp in the shop for another issue and the technician said he couldn't reproduce the radio interference problem. I haven't been able to take the amp to someone elses house and try it there.
I'm at a loss. Seems like dirty power. This is a new house and I've had the problem since living here. The outlet checker says the outlets are grounded and wired properly. Seems that the power conditioner would clean up any RFI. I'd like to try a better power conditioner, but I don't want to spend a lot of money if it's not going to fix the problem.
Does anyone have any ideas?
Thanks, Steve
I've tried several things to check this problem:
- Multiple cables connecting head to cabinet
- Plugging into outlets in other rooms
- Plugged amp into power conditioner (Panamax M4300-PM)
- Checked outlets with outlet checker and they check out okay
- Disassembled amp and checked power cord connections which seem fine
I can change the radio reception by moving the power cord around. If I grab on to the cord in the back of the amp near where it connects, the rock station almost goes away but I can hear the country station better. I have even gone so far as to try shielding the power cord with grounded tin foil since it seems to be acting as an antenna. I recently had the amp in the shop for another issue and the technician said he couldn't reproduce the radio interference problem. I haven't been able to take the amp to someone elses house and try it there.
I'm at a loss. Seems like dirty power. This is a new house and I've had the problem since living here. The outlet checker says the outlets are grounded and wired properly. Seems that the power conditioner would clean up any RFI. I'd like to try a better power conditioner, but I don't want to spend a lot of money if it's not going to fix the problem.
Does anyone have any ideas?
Thanks, Steve