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Topic: Amp picking up the radio |
Jim Ives
From:
Los Angeles, California, USA
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Posted 24 May 2004 11:36 am |
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| Lately my Nashville 1000 has been picking up Korean radio stations when I am at a gig. How do I correct that? |
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John Daugherty
From:
Rolla, Missouri, USA
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Posted 24 May 2004 12:14 pm
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Sometimes there are bad solder connections at the input jacks which act as diodes, which in turn detect radio signals.
SOLUTION: resolder connections
You can also try adding a .001mfd capacitor across the input jacks.
I don't think the capacitor is the best solution because the amp should not pick up radio stations. In my opinion, the amp has a defect.
I suggest that you contact Mike Brown at Peavey. He is great at customer service and I am sure he will offer some good advise. |
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Ben Slaughter
From:
Madera, California
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Posted 24 May 2004 12:22 pm
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| WOW, Korean stations??? Mine only gets Spanish language programing!!! |
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John Daugherty
From:
Rolla, Missouri, USA
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Posted 24 May 2004 12:27 pm
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Jim, on my first reply I forgot to mention the fact that you could be picking these signals up before they get to the amp.
I was assuming you had localized the problem to the amp.
Unplug the cord from the input to see if the problem is still there. If the amp is quiet with no input cable, the problem is with the stuff hooked into the amp or even the guitar pickup itself.
Make sure that you use quality cables. |
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Al Terhune
From:
Newcastle, WA
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Posted 13 Jan 2006 7:55 am
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I've got a Sho Bud Christmas Tree amp that I love the sound of for recording, but it does have a low-volume radio signal that comes out, which...can be a problem. I've got another solid state (400) that does not have any radio signal. Before I resolder the input jacks/add a capacitor, are they any other suggestions?
Al |
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Mike Brown
From:
Meridian, Mississippi USA
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Posted 13 Jan 2006 8:30 am
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| Thanks for your second post, John. The problem needs to be narrowed down to either an external piece of gear first, then I can comment. |
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John Daugherty
From:
Rolla, Missouri, USA
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Posted 13 Jan 2006 8:55 am
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Al, before you tear into the amp, connect your equipment to the amp as usual. Unscrew the cover on the plug you inserted in the amp input. Hold a capacitor across the two terminals on the plug to see if that will eliminate the radio signal. I think you could use a cap in the range of 39pf to 1000pf(.001mfd).
------------------
www.phelpscountychoppers.com/steelguitar
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Al Terhune
From:
Newcastle, WA
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Posted 13 Jan 2006 9:22 am
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John! You've revisted your older-thread-advice. My amp gets a signal with nothing plugged into it. Would your test still affect that? An interesting (I think) observation: When I turn the reverb all the way down, the talking and/or music goes off, but there is still just a bit of radio static. Bring the reverb back up and the talking and/or music comes back on. And, again, it's just audible.
Al |
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Jack Stoner
From:
Kansas City, MO
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Posted 13 Jan 2006 2:15 pm
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Check the grounds on the reverb cables and to the actual reverb pan. Reverb's tend to be a location that picks up RF.
Also, make sure you are using a grounded AC power outlet and that the AC power cable if fully seated in the amp - the AC power plugs tend to work loose on some amps. |
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Al Terhune
From:
Newcastle, WA
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Posted 13 Jan 2006 6:45 pm
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Okay, revelation. I was wrong about my Peavey. It is doing it, too! Again, very low level. All of my cables in are secure and grounded...
Al |
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Jack Stoner
From:
Kansas City, MO
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Posted 14 Jan 2006 3:30 am
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One other thought. Depending on how close your are to the transmitter site, it could be coming in on the AC line. And if it's too strong, nothing you can do to completely eliminate it.
I worked for months trying to get the RFI out of a recording studio that was only one block from an AM Radio transmitter site (KCMO in Kansas City, Mo). I was never able to completely eliminate it, but got it to the point it didn't interfere with recording or mixdown - but couldn't get it out of the headphone amp system. |
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Jack Mansfield
From:
Reno, NV
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Posted 14 Jan 2006 2:00 pm
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| Do you have an upstairs room that you play in, or a downstairs. I pick up radio signals in my upstairs bedroom, or any place upstairs. If I play downstairs then the problem is gone. |
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Al Terhune
From:
Newcastle, WA
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Posted 15 Jan 2006 10:02 am
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| We live in a rambler...and I don't think we live near a station. It's kinda like "Spinal Tap" when they play at the air force base, and their call tower signal starts coming through their amps...not that loud, though, but about as funny if I'm not pulling my hair out over it! |
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John Daugherty
From:
Rolla, Missouri, USA
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Posted 15 Jan 2006 11:38 am
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| Al, the reason I suggested placing a cap on the plug at the input is, this allows access to the amp input stage without removing the chassis from the case. This is an easy way to determine if you need to install a cap inside the amp at the input jack. |
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Jim Ives
From:
Los Angeles, California, USA
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Posted 15 Jan 2006 8:18 pm
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I don't know how this became a topic at this late date. Look at the original date of the posting, and then the first response date.
Problem solved.
Thanks, Boys. |
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Colin Goss
From:
St.Brelade, Island of Jersey, Channel Islands, UK
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Posted 15 Jan 2006 11:47 pm
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| One place I used to play obviously had a problem on their electrical circuits because whenever the one armed bandit started paying out, so did my amp. Never did find where the money went to! |
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Al Terhune
From:
Newcastle, WA
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Posted 16 Jan 2006 6:43 pm
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Okay, John -- I'll give that a try!
Al |
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Bill Moran
From:
Virginia, USA
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Posted 16 Jan 2006 7:09 pm
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Played a gig for the USO at the Navel Base in Cuba in 1972. Had a D10 Fender and a Ampeg amp. I picked up all the commands to the ships in port, but only when the Fender was connected. Had that problem for 17 days until I packed up and went home.
Bill |
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