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#1
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Peavey CS-800X Question
Scott,
Thanks for the excellent info. I actually got inside of this amp this weekend. Low, and behold: The culprit is the cooling fan. It's a 115VAC muffin fan that is run at a reduced speed until the unit heats up. I'm not sure if this is a worn fan, or if the buzz is normal due to the reduced voltage. When the fan is disconnected, the amp is dead quiet. I considered just plugging it into 115VAC; but, running it full-on would be annoying as well. Think a DC fan (of similar dimensions and air flow rate) would work? Implemntation would be simple: 115VAC-12V transformer, bridge rectifier, filter cap.... That would preserve the dual-speed feature without getting into the temp sensing end of it. There's plenty of room inside the case. Regards, Ernst Scott Dorsey wrote: wrote: I have one these units, and am pleased with it except for the growling of the power transformer. Peavey Co. says this is normal. Are there any replacement (preferably toroidal) transformers available out there? Sure. Get the voltages, currents, and physical size. Call Plitron and Toroid Corporation of Maryland and ask how much they'll charge to make you one. Semicustom toroids are pretty common... the company winds the primaries and keeps them on the shelf, then they'll add whatever secondaries you want on when you order them. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#2
Posted to rec.audio.pro,rec.audio.tech
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Peavey CS-800X Question
wrote:
Thanks for the excellent info. I actually got inside of this amp this weekend. Low, and behold: The culprit is the cooling fan. It's a 115VAC muffin fan that is run at a reduced speed until the unit heats up. I'm not sure if this is a worn fan, or if the buzz is normal due to the reduced voltage. When the fan is disconnected, the amp is dead quiet. I considered just plugging it into 115VAC; but, running it full-on would be annoying as well. Think a DC fan (of similar dimensions and air flow rate) would work? Implemntation would be simple: 115VAC-12V transformer, bridge rectifier, filter cap.... That would preserve the dual-speed feature without getting into the temp sensing end of it. There's plenty of room inside the case. Go to Ace Hardware and ask for Zoom Spout Oil. This is Castrol OC-11 turbine oil that has been rebadged. Then get some high grade instrument grease... in a pinch Mobil 1 racing grease will work. Take the fan out and remove the plastic cover over the bearing.... on some fans you may need to remove the label on it. Put a couple drops of oil in there and work it back and forth. Press down on the blade so the oil can get down the shaft and around the bearing. Then pack the hole up with grease (it will only take a gram or two) and put the plastic cover over it. This will keep the fan quiet for a couple more years until you wind up having to replace it. Digi-Key will sell you a Comair/Rotron replacement that will last forever. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#3
Posted to rec.audio.pro,rec.audio.tech
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Peavey CS-800X Question
wrote: full-on would be annoying as well. Think a DC fan (of similar dimensions and air flow rate) would work? Implemntation would be simple: 115VAC-12V transformer, bridge rectifier, filter cap.... That would preserve the dual-speed feature without getting into the temp sensing end of it. There's plenty of room inside the case. Delta Electronics makes a series of DC brushless fans called Sensflow with builtin thermal sensing control. http://www.delta.com.tw/product/cp/d...cfans_main.asp I have one that's 12vdc, 4.75" square. There should be a size, voltage, and flow-rate model to fit your needs. You might find one that can be used with the voltages available inside the amp without needing an additional ps to supply the fan, or the amp may have 12vdc already. rd |
#4
Posted to rec.audio.pro,rec.audio.tech
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Peavey CS-800X Question
Scott Dorsey wrote: Go to Ace Hardware and ask for Zoom Spout Oil. This is Castrol OC-11 turbine oil that has been rebadged. Then get some high grade instrument grease... in a pinch Mobil 1 racing grease will work. Worth a try. I do have a line on a Rotron replacement. Thanx |
#5
Posted to rec.audio.pro,rec.audio.tech
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Peavey CS-800X Question
Thanks for the excellent info. I actually got inside of this amp this
weekend. Low, and behold: The culprit is the cooling fan. This is not an uncommon thing with Peavey amps, apparently. I had a Peavey T-Max bass amp a few years back with a cooling fan that howled like a banshee. Mentioned it to the dealer, and they acted as if it was a common thing. Peavey sent me a new one, free of charge, with no questions asked. Problem solved. Wouldn't surprise me if yours was the identical fan. |
#6
Posted to rec.audio.pro,rec.audio.tech
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Peavey CS-800X Question
Brian Running wrote: Thanks for the excellent info. I actually got inside of this amp this weekend. Low, and behold: The culprit is the cooling fan. This is not an uncommon thing with Peavey amps, apparently. I had a Peavey T-Max bass amp a few years back with a cooling fan that howled like a banshee. Mentioned it to the dealer, and they acted as if it was a common thing. Peavey sent me a new one, free of charge, with no questions asked. Problem solved. Wouldn't surprise me if yours was the identical fan. Guess it never hurts to ask. Thanks for the info. Ernst |
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