air brake?

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air brake?

Postby rockgod212 » 26 Jul 2017, 00:12

I have seen some layouts for this air brake attenuator, I want to build one for my 100watt marshall clone, I have a 25ohm/100watt rheostat coming for this build. anybody have any ideas on how to build it with the rheostat instead of the variable resistor thing? any help gretly appreciated.
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Re: air brake?

Postby phatt » 27 Jul 2017, 13:04

Unless I've missed the point a rheostat IS a variable resistor (just wire wound) What you need is and Lpad which is very different. (2 rheostats with 1 common wiper)
Either way if you wish to attenuate a 100 Watt amp you will need a lot more than a 100 watt rheostat otherwise it will overheat and likely burn out and take the Amplifier with it. :shock:
Search for *attenuater* on this forum as there have been a few posting on that subject,, have no time right now to find them.
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Re: air brake?

Postby rockgod212 » 28 Jul 2017, 23:10

AirbrakeLayout.jpg
what I was planning on doing is this. it would still have the 25ohm 100 watt shunt resistor, I will omit the 25ohm 100 watt variable leg resistor( want to use the 25ohm 100watt rheostat here,) I will omit the 150ohm 50watt rheostat and use a power resistor here, omit the switch is the goal. just need advice on wiring it, should I just trace the path and wire it accordingly. is this airbrake not capable for a 100 watt head, I don't plan on diming it, just to get a bit more power thing going on.
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