Hoffman Amplifiers Tube Amplifier Forum
Other Stuff => Other Topics => Topic started by: uki on January 01, 2022, 05:18:21 pm
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I want to use it for a leslie cab.
I did look for a circuit to run it with 2 speed but haven't find anything, maybe I'm using the wrong words :dontknow:
Is the motor in the attached schematic AC or DC ? how much voltage it need to run ? :w2:
Thanks in advance !
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It is hard to tell where the motor is connected to, the schematic says (M 13) but where it goes?
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M13 mates with M14.
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I was looking for another M13 :BangHead:
So AC motor then? How the rest of the circuit interact with it, like when in play mode it turn slow, and rewind/forward it turn faster?
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Only see play or record as options so far
if that's the case, once all the tape is on the take-up reel, remove reel, put original reel as take-up, take-up reel as "supply" No rewind required :icon_biggrin:
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I was looking for another M13 :BangHead:
So AC motor then? How the rest of the circuit interact with it, like when in play mode it turn slow, and rewind/forward it turn faster?
There is no circuit interaction with that motor. You turn it on and the motor turns at ONE SPEED ONLY! All the speed changes and reverse direction (if any) are accomplished with pulleys and belts. It's all mechanical. And this is why you should forget about using a puny one speed R2R motor for a Leslie. You would be better off with a washing machine motor and 20-speed bike sprocket/chain. :l2:
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@shooter this one have rewind record stop play forward
All the speed changes and reverse direction (if any) are accomplished with pulleys and belts. It's all mechanical. And this is why you should forget about using a puny one speed R2R motor for a Leslie. You would be better off with a washing machine motor and 20-speed bike sprocket/chain. :l2:
Bummer!!! :l2: I was thinking if that was the case about the speed change, pulleys and belts.... mechanics....
Well I thought it was possible to use some motor controller(look picture(something like that)) for the speed change.
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The TRIAC "dimmer" works for Universal (brush type) motors, and *some* AC motors with fan loads (however I burned-up an expensive motor this way). Your motor "has a fan", true, but just a teeny one, not enough to influence speed.
This type motor can only run "near line frequency", 1800rpm in 60hz lands. Typically 1750rpm, very little slip.
You "can" get multiple speeds by running this motor at line speed and rigging various diameter pulleys. Record players did this a lot. But it looks like you want a 0.05" to 10" pulley ratio, which is too small on the small side.
You CAN buy small DC motors with controllers on the robot-hobbyist sites. Maybe easier than working 1909 technology today. (I been reading on dynamos and factories with belting from overhead pulleys... that was cool when everybody did it and the local ironmonger could pour any shape of iron you wanted, but those days are gone.....)
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I have 4 of those R2R motors, for what those motors could be used ?
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for what those motors could be used ?
if you have one with working fan blades;
I used your "lamp dimmer" circuit, put a small fan in my duct to keep the air moving when the main squirrel took it's union break :icon_biggrin:
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Looks like those fans with the motor is just for cooling, they are barely attached the axis of the motor, it can spin alone.