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Orange Tube C8 Clock Motors Question

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#1 Tom Duncan

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Posted 24 March 2020 - 03:16 PM

Parting out an old Tuthill Super C8, primarily because no one seems to want to buy it whole but also because the motors wouldn't run and other issues. I tried the 'toothpick through the sight window" trick to encourage movement of the motor rotor but to no avail. One turned for a while but then stopped, the other wouldn't run but wanted to. 

 

Upon disassembling the base and removing the motors and the covers I plugged each separately into 120v and of course, they both rotate. They are both date stamped 11-79. Upon closer inspection I also see "220v 50 CY" which I would think means the motor was made for 220v and 50 cycles, which of course they weren't getting with 120v (likely, probably a bit more or less) and 60 cycles.

 

What am I misunderstanding?

 

Tom Duncan 

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#2 photoracer18

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Posted 24 March 2020 - 03:31 PM

Must be one for the European market if it runs on 220v 50 cycle power.



#3 asphy

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Posted 24 March 2020 - 03:47 PM

Hi Tom,

your SYNCHRON motors are definitively made to run under 50Hz ( 220 V) and you can only replace them. Also you may want to check if there is a letter R or L after the number 36442( no visible on your photo) .( R stands for reverse-suitable for Southern hemisphere  and L - for Northern one) . 

You should see letter L if they are made fo 

In fact I had the same problem ( I needed a R model , 50 Hz(220V) and Frederic Pauli ( astroptx@yahoo.com) traded  mine L- version one)

Hope that may help.

Clear skies. 

Asphy



#4 asphy

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Posted 24 March 2020 - 03:48 PM

You should see letter L if they are made to Northern Hemisphere.



#5 Stevegeo

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Posted 24 March 2020 - 04:06 PM

You can find a replacement motor 120volt 60 cycle.. they are cheap,    and common and used in many appliances like washers and dryers. 

Most are made by only a few manufacturers,  have a common frame from what I have seen.

 

I would bet if you got that motor off. And went to an appliance repair shop, they would probably have a replacement .

 

Your biggest obstacle  is finding a place .  If you found a manufacturer  label,  a quick online search could result in a replacement easily.

 

Good luck.

PM me directly, I have difficulty.

 

Stevegeo 



#6 Stevegeo

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Posted 24 March 2020 - 04:14 PM

Your motor looks like it can be replaced by one from

 

Motor, 120VAC
ZORO #: G7876346 MFR #: 101
5 ReviewsWrite a Review
$17.45
Description/Special Features: 120VAC
Item: Replacement Motor
For Use With: TORK Series 1100 and 7000 Timers...

 

Check this one out. Looks like a direct  replacement.      Check to be sure.

 

Stevegeo 



#7 Tom Duncan

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Posted 24 March 2020 - 08:15 PM

Ah, thanks everyone for your input. So no small wonder the motors are sluggish at 120v.

 

As to...

 

 

Hi Tom,

your SYNCHRON motors are definitively made to run under 50Hz ( 220 V) and you can only replace them. Also you may want to check if there is a letter R or L after the number 36442( no visible on your photo) .( R stands for reverse-suitable for Southern hemisphere  and L - for Northern one) . 

You should see letter L if they are made fo 

In fact I had the same problem ( I needed a R model , 50 Hz(220V) and Frederic Pauli ( astroptx@yahoo.com) traded  mine L- version one)

Hope that may help.

Clear skies. 

Asphy

...the full lettering/number sequence stamped into the motor housing on one side is "364421-2WA-6 11-79" (other than the date this is probably the makers stock numbers or some such) and on the other side "620 220V 50CY 3W 1 RPH" (most of that is understandable except for the '620'). There is what looks to be a makers mark that looks like the letters "SA" inside a "C" between the two sequences. 

 

So if this a European motor setup I have to wonder how did it get into a Tuthill Super C8 here in the USA? Perhaps he sold them to European buyers and it came back? Unfortunately the history of the scope is unknown. As I'm parting out the scope I won't bother with replacing the motors. 

 

Tom 


Edited by Tom Duncan, 24 March 2020 - 08:17 PM.


#8 Kasmos

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Posted 25 March 2020 - 06:24 PM

To add to the confusion Starwizard has NOS motors on ebay, but they also say 220V.

 

https://www.ebay.com...74AAOSwPTReCSNG

 

In the description he states the following:

 

Note:
220V / 50HZ (.75 RPH) Northern Hemisphere
and 220V / 50HZ (Reverse) Southern Hemisphere
Motors are available - Specify when placing your order.

 

Are the 220v Northern Hemisphere motors leftovers (due to low demand), since they were not intended for the US and Canada?



#9 apfever

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Posted 25 March 2020 - 06:29 PM

I had a black Celestron, maybe an Ultima, that had the 220V 50hz Southern rotation. I sold it to a person in Australia. That was years ago and the shipping cost the buyer hundreds then. I don't know about the practicality of such shipping now.  Maybe there's a starving market somewhere down there that will fork for it.



#10 Wurthman20

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Posted 28 March 2020 - 04:05 PM

Can anyone tell me if this is 220?

#11 Wurthman20

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Posted 28 March 2020 - 04:11 PM

220?

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#12 Wurthman20

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Posted 28 March 2020 - 04:16 PM

Any info on this

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#13 Masvingo

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Posted 28 March 2020 - 05:33 PM

Looks like a Powerstar, if so should be a 12v DC motor.




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