I am getting a pentec mti 2800A

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truckracer

truckracer

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Sep 17, 2004
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How do these old school polarizer / positioners work? Are they decent devices?

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FaT Air

FaT Air

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Feb 27, 2010
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Probably still works fine, as designed, as they were built like tanks BITD.
Got pictures??
 
truckracer

truckracer

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Sep 17, 2004
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I ordered two from ebay. Says they work. Paid 30.00 shipped

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dougruss

dougruss

Retired and Loving it !
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You'll need a Polarotor II Motor, it only has 2 wires ( good luck ) in order to use that 2800A Box.
I had one of those boxes last year to play around with. Couldn't get it to work the 3 Wire Polarotor motors, so off
to the Goodwill Box it went.

Below is a pic of the wiring diagram...NOTE the 2 Wire Polarotor II ( 3,4 connection );

Polarotor SCN 0007a
 
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FaT Air

FaT Air

HOA Free Zone
Feb 27, 2010
6,668
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97W 48N
I swapped out a few of those polarity motors BITD. Upgraded whole systems to a Toshiba IRD.
Think the servo can be 'gutted' of the electronics and then run the two motor wires out. (Seems I saw this on the net somewhere)
 
Titanium

Titanium

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May 23, 2013
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I threw away 6 or 8 of those years ago when the Polorotor 2 units became scarce. Agreed, not of any use with 3 wire servo motors.


Brian Gohl
Titanium Satellite
 
turbosat

turbosat

SatelliteGuys Master
Dec 26, 2006
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Oneonta,AL
I think the first dish I had used one of those PR2's, I remember building a box with a toggle switch in it and a 9v battery to switch it when the receiver circuit went out, hehe.
 
truckracer

truckracer

Thread Starter
SatelliteGuys Pro
Sep 17, 2004
4,338
351
Charleston wv
Where can I get a polorotor 2?

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Magic Static

Magic Static

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Oct 12, 2010
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Fatair is right. You can rip the guts out of a 3 wire polarizer and make it a two wire one. I have never done that but I have heard that more than once.
 
truckracer

truckracer

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SatelliteGuys Pro
Sep 17, 2004
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What changes do you make? Does it just become a dc motor?

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Magic Static

Magic Static

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What changes do you make? Does it just become a dc motor?

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That's the way I heard it. Take out the electronics and leave the motor and it's two leads.
 
Titanium

Titanium

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May 23, 2013
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When gutting the servo electronics, servo position feedback is no longer active. There will be no reference confirmation for the positioning of the probe. You will just need to more aware of the install position in relation to the counter. Likely will find that when the power is interrupted or removed the two will lose reference and require re-sync.
 
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