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

Sun Jul 19 16:07:26 UTC 2009

Hi Joe,
It depends on thestyle, make and possibly even factory / production run. The polarisation is not intended to be user selectable. Some connectors have a common metal shell and all key positions in the insulator. Some have a dedicated shell or insert for each polarisation. Even if the insert has all options, it does not follow that you can dissasemble the connector to change it. Many connectors are potted and are difficult to dissasemble. Most crimp type 5015's cannot be dissasembled. Many solder types are assembled with internal "C" clips. These are not intended to be removed, but often can be. In an emergency, I've dissasembled a connector, filed off the male key for the insert and epoxied the insert in place. I used the mating connector as a jig to get the keying correct. It is very much a judgment call if this is acceptable. Personally I would not do it on a connector used for mains.

Robert G8RPI.

--- On Sun, 19/7/09, J. L. Trantham <jltran at worldnet.att.net> wrote:

> From: J. L. Trantham <jltran at worldnet.att.net>
> Subject: Re: [time-nuts] AC cord or connector for 5061A
> To: "'Discussion of precise time and frequency measurement'" <time-nuts at febo.com>
> Date: Sunday, 19 July, 2009, 4:24 PM
> 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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> 
> 
> 
> 
> 
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