[time-nuts] AC cord or connector for 5061A

[J. L. Trantham]

As usual, the list has provided extremely helpful information.

The 'W', indeed defines the rotation of the insert.

Interestingly, I note on the picture from Tom's site exactly matches my
connector (I just need more) and it shows 'W', 'X', 'Y', and 'Z' around the
face of the insert with the 'W' aligned with the keying slot.  

If this means that the rotation can be 'user selected' as you assemble the
connector, I am home free.  I have not tried to disassemble the connector
yet but will when I get back from work today.

Anyone know anything about that?  Is it 'user selected' on the mating
chassis connector as well?

Thanks,

Joe

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Arnold Tibus
Sent: Sunday, July 19, 2009 10:01 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] AC cord or connector for 5061A


MS3106A-18-22SW ? 
that special type of connector will be very hard to get 
(if you do not find the original cable for this unit)!

The insert is not standard:
"Not MSA/B insert arrangements and polarization"

This spec. is very old and even the US-Militaries did advice already decades
of years ago to not use them anymore in new design.

One problem with this old MIL-Spec. connectors is that these contain  a lot
of cadmium for protection against corrosion on their surface. 
Cadmium is known to be very toxic and is today forbidden to be applied. 
The cadmium is covered by a green chromate film, which is not very 
resistant when the surface is being scratched with some force.

Technical details:
It is a MIL-C-5015 Power type connector with large contacts, 
threaded coupling, straight plug and shell size 18,
But this contact arrangement18-22 is not on all manufacturers lists. 
I guess that only some chinese manufacturer do still have them 
in the productiong line for spares, if at all.

Attention to the 'W' in the type number which does mean that 
the insert is turned by 70 deg. to avoid to be connected with std. 
types used for other purposes...both mating part must have this marking!

some techn. infos under 
http://www.in2connect.uk.com/c2/uploads/a5015%20ms1.pdf
www.amphenol-aerospace.com/pdf/knowconnectors.pdf

I would propose in this case to exchange the original parts with 
modern types fitting in this position and being qualified to be used 
for mains connection.

Good luck!

regards
Arnold


On Sun, 19 Jul 2009 07:25:03 -0400, John Ackermann N8UR wrote:

>I got some from Digi-key a year or so ago.  Unfortunately, I don't
>recall the DK part number, but I recall I had to do a cross-reference 
>from the Cannon part number to another manufacturer (I think AMP) and 
>that's what DK had.

>John
>----

>J. L. Trantham said the following on 07/18/2009 11:58 PM:
>> I am aware of the connection issue but I can't find the connectors.  
>> Are they still available or should I change both the chassis 
>> connector and mating connector to something that I can find?
>> 
>> Thanks,
>> 
>> Joe
>> 
>> -----Original Message-----
>> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] 
>> On Behalf Of Tom Van Baak
>> Sent: Saturday, July 18, 2009 10:45 PM
>> To: Discussion of precise time and frequency measurement
>> Subject: Re: [time-nuts] AC cord or connector for 5061A
>> 
>> 
>>> Does anyone know of a source for a power cord for the 5061A (or 
>>> 5061B,
>>> 5065A, etc.)?  I am looking for 3 cords or the connector that mates 
>>> with AC connector on the back.
>>>
>>> The AC Cord is HP part number 1251-2457 and the connector that mates
>>> with the connector on the back is a Cannon MS3106A-18-22SW.
>>>
>>> Thanks in advance.
>>>
>>> Joe
>> 
>> See if this helps.
>> 
>> http://www.leapsecond.com/museum/hp5065a/conn.htm
>> 
>> Best to open the bottom to make sure your unit has pins
>> that match the schematic.
>> 
>> /tvb
>> 
>> 
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