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Old 02-13-2013, 10:00 PM   #1
megajosh
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6505+ bad tubes? Video included

When I turn on my amp (with nothing plugged into the input or fxloop) it makes this static crackling sound as it turns on and a low humming noise. I tapped the preamp tubes with a pencil and didn't hear any sounds from them. Could this be bad power tubes?

Here's a video of the sound



Thanks
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Old 02-13-2013, 10:10 PM   #2
AxSilentxLine
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Honestly man I didn't hear any crackling. Sounds normal the 6505 is a pretty noisy amp. What's the volume at?
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Old 02-13-2013, 10:21 PM   #3
Charvel1995
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The 6505 is quite noisy.

Doesn't sound like anything is wrong with it. That's what mine sounded like when I turned it up too much. Turn down the gain and see if there's a difference
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Old 02-13-2013, 10:22 PM   #4
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Quote:
Originally Posted by AxSilentxLine
Honestly man I didn't hear any crackling. Sounds normal the 6505 is a pretty noisy amp. What's the volume at?


Pre at around 4 and post at around 2
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Old 02-13-2013, 10:23 PM   #5
Charvel1995
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2 for a 6505 is fairly loud in all honesty. That's barely passing for bedroom volumes.
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Old 02-13-2013, 10:35 PM   #6
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I have a jsx (same company, peavey) which does the same exact thing (going off description, not video because it doesn't say much), but I haven't changed the tubes since I bought it used. I looked at the tubes inside a few times and I call tell someone changed them around, but I've been noticing lately it's starting to get worse so it is a very big possibility. This has been a year so far since I bought it fyi, and I seldomly play it.

I don't think you really have to worry about it until you notice some other changes. If you're really worried you can change the tubes. Wouldn't hurt unless they're already brand new.
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Old 02-13-2013, 10:39 PM   #7
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They haven't been changed in the 3 years I've had the amp. Not sure when/if they were changed before then. My amp sounds the best when its first turned on, then seems to get muddier the longer it's on.
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Old 02-13-2013, 10:47 PM   #8
Charvel1995
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Is your tone bad/has it gotten worse recently?

May as well give the tubes a change if your tone is being affected.
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Old 02-14-2013, 12:02 AM   #9
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Sounds normal to me. That's why pretty much everyone who uses that amp uses a noise gate
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Old 02-14-2013, 02:34 AM   #10
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In my experiences, if you play an amp with the gain settings pretty high and the volume between moderate and high volumes (for band practices and live jamming only), preamp and power amp tubes last about 1.5 - 2.5 years. This was when I was playing about 2 or 3 hours a day.

It would be worthwhile to invest in some new tubes at this point because a tube replacement is inevitable, and 3 years on a set of tubes is getting close to the end of their lifespan. Unless of course you're running NOS tubes, those things will last 5 - 10 years easy.
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Old 02-14-2013, 02:49 AM   #11
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Quote:
Originally Posted by Tremolo Bum
Sounds normal to me. That's why pretty much everyone who uses that amp uses a noise gate


+1 i have played amps that are very loud and the 6505 is just one of them. but i don't even hear anything wrong.
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Old 02-14-2013, 07:57 AM   #12
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You could just buy a noise gate like a decimator? It didn't sound like the amp hum was that bad.
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Old 02-14-2013, 02:31 PM   #13
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Sounded like typical high gain amp noise. Gate it.
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