[Milsurplus] BC-669 connector

[Michael Hanz]

With a tapered file, /lots/ of effort.

With a #3 center drill, you can drill out the smaller hole and leave it 
with the correct .125" sleeve size for the connector pin.  Use lots of 
lubricant.  More importantly, it will maintain the center location of 
the original hole, a process that is almost impossible using a tapered 
file.  (I've tried...)

73,
Mike KC4TOS

On 11/6/2026 3:10 AM, Jim Whartenby via Milsurplus wrote:
> Robert
> How much effort do you think would be required to open up those three 
> #16 contacts in a 28-8P connector to accept #12 contacts using a 
> tapered Swiss file?  A half day's work versus patiently waiting for a 
> couple of years seems worthwhile, doesn't it?
> Regards,
> Jim
>
> *Logic is a systematic method of coming to the wrong conclusion with 
> confidence.* *Murphy*
>
>
> On Thursday, November 5, 2026 at 07:43:14 PM CST, Robert Goff 
> <robert.h.goff at gmail.com> wrote:
>
>
>     Seems like this subject comes up every few years.
>     Here is Robert Down's response to me back in 2012:
>     ________________________________
>
>     Sorry, but the connectors are NOT AN 3108-28-8S or P.  They are
>     actually AN
>     3108-28-767S or P.  Which were custom modified from the 28-8. 
>     That's why
>     they are so difficult to find.  Amphenol does not appear to have
>     actually
>     made any -28-767 inserts.  To add to the confusion, most if not
>     all of the
>     modified inserts that I have seen still have -8 molded into the
>     face.  The -767
>     was only marked on the barrel (and not on all of them, either).  The
>     difference is that the 28-8 has 10 #16 and 2 #12 contacts.  The 28-767
>     has 5 #12.
>     three of the holes for the #16 (A,B,C) were bored out for #12.
>
>
>     I think Bill Perry has been sold out of the proper connector for at
>     least 15 years. I finally did find an original cable just by patiently
>     watching ebay. It took a couple years and shipping from Italy, but I
>     got it.
>     Good Searching,
>     73,
>     de Robert W7MKA
>     ______________________________________________________________
>     Milsurplus mailing list
>     Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>     Help: http://mailman.qth.net/mmfaq.htm
>     Post: mailto:Milsurplus at mailman.qth.net
>
>     This list hosted by: http://www.qsl.net
>     Please help support this email list: http://www.qsl.net/donate.html
>
>
> ______________________________________________________________
> Milsurplus mailing list
> Home:http://mailman.qth.net/mailman/listinfo/milsurplus
> Help:http://mailman.qth.net/mmfaq.htm
> Post:mailto:Milsurplus at mailman.qth.net
>
> This list hosted by:http://www.qsl.net
> Please help support this email list:http://www.qsl.net/donate.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/milsurplus/attachments/20261106/5513b36e/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: us3wl90h8aqOyKsG.png
Type: image/png
Size: 44730 bytes
Desc: not available
URL: <http://mailman.qth.net/pipermail/milsurplus/attachments/20261106/5513b36e/attachment-0001.png>