Reverb Hum [message #5040] |
Mon, 08 November 2004 11:46 ![Go to next message Go to next message](/FUDforum/theme/vk30/images/down.png) |
miscreantorgan
Messages: 1 Registered: November 2004
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Junior Member |
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My Kustom 150 combo (pretty sure it's 4X10) gets a real hum going whenever I use the reverb. It's especially apparent when I *really* crank the reverb. It (quickly) gets to the point where the hum is more than you can take. Now, theoretically, I could just turn the reverb off and use an external box, but I'd prefer to use the built-in reverb.
I do know that the reverb does something 'cuz I can jar the amp and get the thunder sound. Fairly sure some signal is going both in and out, too, 'cuz I hear some reverb when I play through it.
I also noticed that if I shift the "head" of the combo (when I've got things all unscrewed) so that it's got the back part tilted up, the hum lessens. The hum also lessens with the back of the amp off. To me, this means that something's feeding back inside, bouncing all over.
One thought I had is that the rubber mat on top of the reverb tank may be old. I've tried to reseat it, though, and it still bends OK.
Thoughts/ideas?
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Re: Reverb Hum [message #5041 is a reply to message #5040] |
Mon, 08 November 2004 12:08 ![Go to previous message Go to previous message](/FUDforum/theme/vk30/images/up.png) ![Go to next message Go to next message](/FUDforum/theme/vk30/images/down.png) |
rodak
Messages: 514 Registered: October 2001 Location: Georgia
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Senior Member |
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Speaking of reverb, I have two, possibly related problems (one I've brought up here before, but can't remember what the advice was). figured maybe someone could address them all in this one thread.
Kombo organ: Reverb works, but as I turn up the depth, there's a lot of noise, sort of like a hiss, but with more emphasis on the low frequencies, more of a "whoosh". The reverb is definitely working, although not as pronounced as I'd expect, but the noise makes it pretty unuseable.
K150 combo: Similar problem to the Kombo. The tank is mounted upside down in the amp chassis - is that normal? The rubber tank cover has sagged down and may be touching the springs. Any problem relocating the tank to the bottom of the amp, right-side up?
www.combo-organ.com
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Re: Reverb Hum [message #5068 is a reply to message #5060] |
Sat, 13 November 2004 22:55 ![Go to previous message Go to previous message](/FUDforum/theme/vk30/images/up.png) ![Go to next message Go to next message](/FUDforum/theme/vk30/images/down.png) |
rodak
Messages: 514 Registered: October 2001 Location: Georgia
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Senior Member |
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Thanks, Steve. My K150 is an SC combo amp. Did those normally have the pan mounted in the bottom(what I would expect), or hanging upside down inside the amp chassis (a bit odd, I thought)?
www.combo-organ.com
[Updated on: Mon, 15 November 2004 23:01] Report message to a moderator
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Re: Reverb Hum [message #5094 is a reply to message #5093] |
Thu, 18 November 2004 08:59 ![Go to previous message Go to previous message](/FUDforum/theme/vk30/images/up.png) ![Go to next message Go to next message](/FUDforum/theme/vk30/images/down.png) |
rodak
Messages: 514 Registered: October 2001 Location: Georgia
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Senior Member |
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I think many reverb tanks were in those bags. I remember seeing them in the bottom of Fender amps, and I have one with "Traynor" on it. It's more of a heavy canvas bag with a smooth vinyl outer layer. I've never known what those were for, but noise reduction certainly makes sense. I'll have to dig up that bag - the tank that was in it was shot; hope I didn't throw the whole thing out!
www.combo-organ.com
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Re: Reverb Hum [message #5151 is a reply to message #5128] |
Tue, 14 December 2004 11:31 ![Go to previous message Go to previous message](/FUDforum/theme/vk30/images/up.png) ![Go to next message Go to next message](/FUDforum/theme/vk30/images/down.png) |
C4ster
Messages: 686 Registered: June 2001 Location: Mukwonago, WI (Milwaukee...
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Senior Member |
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Don't worry about the heat. The reverb does not generate any heat on it's own. Fender never vented their reverb pans and they were in a naughyde bag.
Conrad
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Re: Reverb Hum [message #5332 is a reply to message #5040] |
Wed, 12 January 2005 08:40 ![Go to previous message Go to previous message](/FUDforum/theme/vk30/images/up.png) |
stevem
Messages: 4759 Registered: June 2004 Location: NY
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Senior Member |
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The frankie heads use a black wire to ground the pan, all the latter heads get the ground to the pan thru the shielded conductor RCA cables so a seperate ground conductor is not needed.
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