Originally posted by tyler8611
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Deluxe Reverb problem
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Originally posted by SoulFetish View PostI’ve seen 6V6s rated for both 12W and 14W. The 70% figure I quoted was at 12W.
I've edited my previous post for the 12W version. If he's using JJ's, he can use the 9 over 14 = 65% figure.Originally posted by EnzoI have a sign in my shop that says, "Never think up reasons not to check something."
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Thanks for the help guys. The only issue I have now is this sound like speaker cone tearing (though it isn't) when I dime the vibrato channel. It is a ripping sound that spurts around after sustaining a chord. Happens with or without the effects. I've changed V2 and it's still there. Again, only happens on 10.
The 6v6s are almost new JJs. The one nearest the rectifier has a slight blue glow around one of the spacers and the blue actually intensifies when I play a note or chord on 10.
Guess it's either that power tube or something internal. I swapped preamp tubes and also hooked up to a different speaker with the same result.
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Originally posted by tyler8611 View PostThanks for the help guys. The only issue I have now is this sound like speaker cone tearing (though it isn't) when I dime the vibrato channel. It is a ripping sound that spurts around after sustaining a chord...My band:- http://www.youtube.com/user/RedwingBand
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Originally posted by pdf64 View PostIssues that occur when gain is increased may be due to oscillation; closely examine the precise placement of wires in a real BF and review your lead dress against that.
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I can't really make out the bad noise from the soundfile, but I don't have much for speakers.
Often, a fault that shows up only in cabinet is due to vibration. Could be a bad tube, bad tube/socket connection, bad solder joint, dirty pot, etc.
I would try applying a constant signal with the chassis out of the cab, then tap around the chassis with a chopstick or rubber mallet or something and see if you can recreate the problem.Originally posted by EnzoI have a sign in my shop that says, "Never think up reasons not to check something."
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Originally posted by g1 View PostI can't really make out the bad noise from the soundfile, but I don't have much for speakers.
Often, a fault that shows up only in cabinet is due to vibration. Could be a bad tube, bad tube/socket connection, bad solder joint, dirty pot, etc.
I would try applying a constant signal with the chassis out of the cab, then tap around the chassis with a chopstick or rubber mallet or something and see if you can recreate the problem.
I'll go back in and do a more thorough check. I didn't observe anything odd when I poked around the lead dress previously. Would it more likely be caused by V2 or the 6v6s?
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It could be any tube. When it's doing it in the cab you can hold the tubes with a clean rag (don't burn your hand!) one at a time and see if you can make it stop. You can use a clean oven mitt too.Originally posted by EnzoI have a sign in my shop that says, "Never think up reasons not to check something."
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Originally posted by g1 View PostIt could be any tube. When it's doing it in the cab you can hold the tubes with a clean rag (don't burn your hand!) one at a time and see if you can make it stop. You can use a clean oven mitt too.
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Originally posted by tyler8611 View PostPlaying with the chassis out of the cab, the rca 7025 i had in there was still causing it.
One other thing: if this is getting worse in the cab, means that when the tubes are upside down it gets worse, then there can be mechanical problem in the tubes.
Also tubes are microphonic, they can be obnoxious when in a cabinet, the speaker shakes the tubes which replicate the vibration in the output, this matches what you describe when you play a chord, the underlying vibration.
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