I have an old Hughes & Kettner Tubeman Pedal. It says on the back that it requires a 12v, 400ma, 50-60hz adaptor. I have an adaptor that is 12v, 1.25a, and 60z. Will this work with the tubeman? Will this ruin the tubeman? Thanks.
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Adapters for pedals? (calling electronics experts)
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Re: Adapters for pedals? (calling electronics experts)
Originally posted by twoheadedboyI have an old Hughes & Kettner Tubeman Pedal. It says on the back that it requires a 12v, 400ma, 50-60hz adaptor. I have an adaptor that is 12v, 1.25a, and 60z. Will this work with the tubeman? Will this ruin the tubeman? Thanks.Amps: 66 Fender BF Pro Reverb Combo,1973 50 Watt Marshall Head,Marshall 4x12 A/V Cab,Vox ToneLab LE,Vox VTH Valvetronix 120 Head,Vox AD 2x12 Cab,Roland Cube 20X
Guitars: Several Stratocasters,2 Fender Telecasters,Gibson SG Standard,Tokai Love Rock Les Paul,Dean Acoustic.
Pickups: SD SSL2,SSL5,Twangbanger,Antiquity Surfers,59N,Seth Lover N/B,Dimarzio Fred,Dimarzio VPAF N,Fender Fat 50s,Fralin SP43 Bridge,Brobucker,Antiquity Texas Hot.
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Re: Adapters for pedals? (calling electronics experts)
The pedal doesn't say. The pedal powers up when I use this adaptor, but I get no sound through it. All I get is loud crackling and buzzing when I turn the master volume knob. This is a tube pedal. Could it be that the tube inside is blown?teles? voxes? what is happening to me?!
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Re: Adapters for pedals? (calling electronics experts)
I just swapped out the tube for a new 12AX7 and that didn't change anything. Also, there's a little transformer-type part inside that gets REALLY hot if i leave the pedal on for more than a couple minutes. Like, so hot that it would burn me if I kept my hand on it. There's no visible sign of anything wrong with the pedal. The tube lights up when I turn on the pedal. This is a mystery!teles? voxes? what is happening to me?!
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Re: Adapters for pedals? (calling electronics experts)
Originally posted by twoheadedboyI just swapped out the tube for a new 12AX7 and that didn't change anything. Also, there's a little transformer-type part inside that gets REALLY hot if i leave the pedal on for more than a couple minutes. Like, so hot that it would burn me if I kept my hand on it. There's no visible sign of anything wrong with the pedal. The tube lights up when I turn on the pedal. This is a mystery!Amps: 66 Fender BF Pro Reverb Combo,1973 50 Watt Marshall Head,Marshall 4x12 A/V Cab,Vox ToneLab LE,Vox VTH Valvetronix 120 Head,Vox AD 2x12 Cab,Roland Cube 20X
Guitars: Several Stratocasters,2 Fender Telecasters,Gibson SG Standard,Tokai Love Rock Les Paul,Dean Acoustic.
Pickups: SD SSL2,SSL5,Twangbanger,Antiquity Surfers,59N,Seth Lover N/B,Dimarzio Fred,Dimarzio VPAF N,Fender Fat 50s,Fralin SP43 Bridge,Brobucker,Antiquity Texas Hot.
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Re: Adapters for pedals? (calling electronics experts)
I know that, but when someone says AC adapter, do they mean that it converts AC to DC, or do they mean that it converts AC to a different form of AC? I've noticed that people tend to say AC Adaptor even when the device being powered by the adaptor is DC.teles? voxes? what is happening to me?!
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Re: Adapters for pedals? (calling electronics experts)
Originally posted by twoheadedboyI just swapped out the tube for a new 12AX7 and that didn't change anything. Also, there's a little transformer-type part inside that gets REALLY hot if i leave the pedal on for more than a couple minutes. Like, so hot that it would burn me if I kept my hand on it. There's no visible sign of anything wrong with the pedal. The tube lights up when I turn on the pedal. This is a mystery!Amps: 66 Fender BF Pro Reverb Combo,1973 50 Watt Marshall Head,Marshall 4x12 A/V Cab,Vox ToneLab LE,Vox VTH Valvetronix 120 Head,Vox AD 2x12 Cab,Roland Cube 20X
Guitars: Several Stratocasters,2 Fender Telecasters,Gibson SG Standard,Tokai Love Rock Les Paul,Dean Acoustic.
Pickups: SD SSL2,SSL5,Twangbanger,Antiquity Surfers,59N,Seth Lover N/B,Dimarzio Fred,Dimarzio VPAF N,Fender Fat 50s,Fralin SP43 Bridge,Brobucker,Antiquity Texas Hot.
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Re: Adapters for pedals? (calling electronics experts)
haha, yeah man. I bought this thing off ebay years ago and when I got it, it was in this condition. Every once in a while I open it up and try to figure out whats wrong with it, but I never can. I think I'm either going to take it to a tech or throw it off a bridge so that I can stop thinking about it already.teles? voxes? what is happening to me?!
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Re: Adapters for pedals? (calling electronics experts)
"AC adaptor" is more of a slang term than a technical one. It simply refers to something that converts household 120v AC to something else. So, an adaptor that supplies 12VAC or one that supplies 9VDC would both still be called AC adaptors.
I was just looking over the Tubeman owners manual on the H & K website, and it appears as though your pedal needs an adaptor that supplies AC voltage. You should be able to verify this on the unit itself. Usually, the input power jack will be marked with a "plus" sign if it requires DC. Also, the AC adaptor you have will show polarity on a little diagram on it if its DC.
Look those things over carefully. DC will fry the input if its made for AC.
Artie
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Re: Adapters for pedals? (calling electronics experts)
Its just going to depend on how the circuitry is layed out. For example, they may split the AC as it comes in. Part goes to power a tube, and part goes to a bridge rectifier to power the rest of the circuit. DC will go through a bridge rectifier just fine, possibly lighting an LED. But if an input transformer is toasted, the tube itself, may not be active.
There's a bunch of things that can go wrong if you mismatch AC and DC. It only takes one component to fry to keep the unit from producing sound, even if 90% of the circuit is still good.
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