[Moon-net] 5500 Rotor for EME

[Paul Wade W1GHZ]

the diode is removing 1/2 the AC cycle.  since it goes through a cap, it
still looks like distorted AC at 1/2 the voltage.  so the power is reduced
to either 1/2 or 1/4 (my motors course was 40 years ago!)

the pulsed method in other replies gives full power at reduced speed.

73
paul


At 12:40 AM 1/25/2008, W3cmp at aol.com wrote:
>Hello all:
>
>Although I sent Bill a response directly, the  series of comments about the
>speed of the 5500 made me think about the Alliance  HD-73 and the way it 
>slows
>down the motor.  In the "slow" (1/2  speed) position, a 3A 100 volt diode
>(1N5401) is switched into the motor B+  line.  It is paralleled to ground 
>by a
>220mf 35V electrolytic.  (The  motor cap is 150-189mf at 50 V ac across the
>motor).  Has anyone tried  that method of slowing down the motor?  73   Chris
>Patterson  W3CMP
>
>
>
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