| Reverb feedback in Kasino Club Lead amp [message #15917] |
Tue, 28 June 2011 13:21  |
blindmouse
Messages: 25
Registered: February 2011
Location: The Netherlands
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Junior Member |
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There is a small amount of howl (feedback) on my Kasino Club Lead reverb. It is not much, but it's kind annoying. When I turn down the reverb knob to zero, the reverberation is instantly gone but the howl is slowly fading.I cleaned the four RCA inpots and connectors; grounding is OK. How can I deal with this howl?
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| Re: Reverb feedback in Kasino Club Lead amp [message #15919 is a reply to message #15917] |
Tue, 28 June 2011 15:41  |
chicagobill
Messages: 2005
Registered: April 2003
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Senior Member |
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It sounds to me like the problem is acoustic. The springs are being vibrated by the sound from the speakers.
You can either replace the tank with a new one that hasn't been bounced and stretched out, or you could try and cover the tank with some sort of sound deadening material.
How is the tank mounted right now?
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| Re: Reverb feedback in Kasino Club Lead amp [message #15920 is a reply to message #15919] |
Tue, 28 June 2011 15:58 |
blindmouse
Messages: 25
Registered: February 2011
Location: The Netherlands
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Junior Member |
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It's in a bag, the bag is mounted on the bottom of the amp (like many Fenders). I tried other positions. I even laid it outside the cabinet. Didn't help. The problem increased when I put a T-shirt on the bottom of the amp putting the reverb bag on it and screwed it down.
I was wrong, just played it again, the feedback sound dies too when I turn the reverb down to zero. Laid some isolation foam on the tank: the feedback is still there.
[Updated on: Tue, 28 June 2011 16:05] Report message to a moderator |
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| Re: Reverb feedback in Kasino Club Lead amp [message #15923 is a reply to message #15917] |
Tue, 28 June 2011 19:14 |
stevem
Messages: 4749
Registered: June 2004
Location: NY
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Senior Member |
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Hi, this happens a lot from age, or at least that is they way it seemed when I last fixed a reverb pan that was doing this.
Here`s what to try.
Slip the pan out of the bag and have the pan rolled over so the springs are facing up at you.
At each end of the pan you will see a small transfomer with the wires going into it from the RCA jack.
From day one these move around on the iron core they are set onto, and with age there fit becomes worse and they rock around on the core a lot.
The repair is to get some super glue and dribble it down in between the iron core and the nylon wire bobbin and this will lock the Transformer to the core, and this also improves the sound of the reverb by not having it be so muddy.
One other thing you might pick up from a hobby or craft shop is some fast setting spray for the super glue, as I find that on transfomers that rock a lot the glue runs out the other side somewhat before it has time to set.
The spray will let you get some in and then lock it on the core.
You do not need to ling all 4 sides of the core with glue as just one side will do perfect!
[Updated on: Tue, 28 June 2011 19:16] Report message to a moderator |
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| Re: Reverb feedback in Kasino Club Lead amp [message #15931 is a reply to message #15917] |
Thu, 30 June 2011 18:07 |
stevem
Messages: 4749
Registered: June 2004
Location: NY
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Senior Member |
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Good deal!
It`s one for two things when the pan feeds back like that.
The fix is clean the tarnish off of the jacks so they go from dull gray to shiny, or both the cleaning and the glue thing, but at any rate the gluing always makes the reverb sound better!
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