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  #1  
Old 12-05-21, 23:23
James D Teel II James D Teel II is offline
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Default WS-19 Crystal Calibrator attachment

In the instance of the WS-19, does anyone know the sizes of the screws and special washers used to attach the crystal calibrator to the side of the PSU? They’re not listed in the manual. Thanks.
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James D. Teel II
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1943 Willys MB/ITM jeep
1942 SS Cars No1Mk1 LtWt trailer
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  #2  
Old 13-05-21, 00:25
David Dunlop David Dunlop is offline
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Hello James.

They are a slotted pan head machine screw, 8-32 x 1/4-inch, with matching internal toothed lock washers.

You may end up needing to find 1/2-inch ones and trimming them back. Clearances inside the PSU Case will be critical, to allow for its safe removal from its case with the calibrator mounted.

Hope this helps with the project.

David
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Old 13-05-21, 01:09
James D Teel II James D Teel II is offline
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David,

As always, you’ve come through! Much thanks.
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1943 Willys MB/ITM jeep
1942 SS Cars No1Mk1 LtWt trailer
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Old 13-05-21, 01:59
David Dunlop David Dunlop is offline
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You are welcome, James.

Not sure my explanation covered all the bases, however.

The pan head is necessary as it ends up inside the PSU Case when the calibrator is mounted. That gives clearance for getting the PSU in and out of its case.

The screw shank ends up sticking into the calibrator case, where it needs to be short enough not to snag the calibrator chassis when it needs to be removed and replaced.

David
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  #5  
Old 13-05-21, 03:08
James D Teel II James D Teel II is offline
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That’s a good reason. By the way, are those UNF or BSF threads? I ask, because I recently restored the lunette assembly on my No1Mk1 trailer, and found both types as original equipment in close proximity to each other.
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James D. Teel II
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1943 Willys MB/ITM jeep
1942 SS Cars No1Mk1 LtWt trailer
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  #6  
Old 13-05-21, 05:09
David Dunlop David Dunlop is offline
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8-32 NC according to my guage set, James.

David
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Old 13-05-21, 08:41
Bruce MacMillan Bruce MacMillan is offline
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even the manual omits the screw size except that they are round head. If the calibrator is mounted flat on top the crystal holder has to be rotated.
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calibrator1.jpg   xtalcal9.jpg  
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Old 13-05-21, 15:10
James D Teel II James D Teel II is offline
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Quote:
Originally Posted by David Dunlop View Post
8-32 NC according to my guage set, James.

David
Thank you.
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James D. Teel II
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Retired Police Sergeant/Bomb Tech
1943 Willys MB/ITM jeep
1942 SS Cars No1Mk1 LtWt trailer
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  #9  
Old 13-05-21, 15:16
James D Teel II James D Teel II is offline
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Quote:
Originally Posted by Bruce MacMillan View Post
even the manual omits the screw size except that they are round head. If the calibrator is mounted flat on top the crystal holder has to be rotated.
We have almost the same manual. I’m sure somewhere there’s an actual parts catalog, but until then, I have to ask if they’re missing. Edit: I’ve no idea why this posted sideways like that. It’s frustrating.
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James D. Teel II
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1943 Willys MB/ITM jeep
1942 SS Cars No1Mk1 LtWt trailer
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Old 13-05-21, 18:24
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Ron Pier Ron Pier is offline
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Quote:
Originally Posted by James D Teel II View Post
Attachment 121933

I’ve no idea why this posted sideways like that. It’s frustrating.

Usually pictures from smart phones from my experience? Ron
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Old 27-05-21, 14:49
Bruce MacMillan Bruce MacMillan is offline
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James, As you have several US 19 sets I wonder if they could be from this batch. I found this file while searching the Canadiana archive and have posted to a couple of user groups.
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  #12  
Old 27-05-21, 15:03
James D Teel II James D Teel II is offline
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That’s interesting, but my sets couldn’t have been in that particular group because one was made in 1943, one in 1944, and though the other one doesn’t have a data plate, it came from Canada. That’s not to say they still weren’t in the system though.
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James D. Teel II
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1943 Willys MB/ITM jeep
1942 SS Cars No1Mk1 LtWt trailer
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Old 27-05-21, 16:18
Michael R. Michael R. is offline
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Edit: I’ve no idea why this posted sideways like that. It’s frustrating.
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