[Moon-net] 5500 Rotor for EME

[k3mf at aol.com]

 I have used the diode method in a Yaesu az/el rotor with a pair of 5 wl. antennas on 144 mhz. It slowed the rotation down enough to keep the whipping down enough for the W2DRZ controller to keep from searching back and forth.

Wayde? K3MF


 


 

-----Original Message-----
From: W3cmp at aol.com
To: moon-net at list-serv.davidv.net
Sent: Fri, 25 Jan 2008 12:40 am
Subject: Re: [Moon-net] 5500 Rotor for EME










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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