[Milsurplus] NOS ARR-15 / ARC-2 connectors

[B. Smith]

   McMaster  lists their miniature brass tubing as being .128 ID so that 
should work fine on the radios .125 pins with perhaps just a slight 
crimp in the brass tubing. The OD of the brass tubing is listed as 5/32 
of an inch (.156) and that is just slightly smaller than the depicted 
.185 on Mike's sketch.   Anyway the McMaster part is 8859K2 and is $1.87 
per foot. Get out a hand drill, a sharp knife to score the tubing  and 
some 5 minute epoxy and the job is done and on to the next project.  I 
agree with Robert that it is not necessary to populate the fabricated 
connector with all the pins but just choose the ones you need. The 
connector  may not be perfect but it will get that set up and running 
and off the shelf.
   Improvise - Adapt- Overcome.
k4che



On 6/17/2018 11:35 PM, Robert Downs wrote:
>
> Well, I also did some more looking and actual measurements.  And 
> unfortunately it turns out that the AN, MS, or MIL-C-5015 are not 
> going to be a source for female contacts for making mating connectors 
> for the pins in the connectors on the ARC-2 or ARR-15 radios.  Mike 
> gave the nominal pin diameter as 0.125”.  The #12 pins in the AN are 
> 0.094”  and the next size used is #8, which is about 0.141”.  However, 
> the Cannon K-Series connectors skip from #16 to #10, and the #10 pin 
> averages 0.124”.  Unfortunately, the K-Series aren’t as plentiful as 
> the AN and the #10 contacts, like the #12 in the AN, aren’t that 
> common.  For example, the HV power and control connector for the ATC 
> and AN/ART-13 transmitters and dynamotors, the power and control 
> connector for the TCS transmitter, the power connector for the ARB 
> receiver and ATb transmitter, and several others each have two #10 
> contacts usually for the +/- 24/28 or 12/14 VDC.
>
> However, anyone caught scrapping eight or ten U-7/U’s will probably 
> get strung up by the thumbs until dead.  So watch out what you rob the 
> contacts from. J
>
> Not having the rectangular connectors for the ARC-2 or ARR-15, I don’t 
> know how far the male pins stick out and how far down on the males the 
> females will actually go.  So anyone trying to machine the blocks in 
> order to make a mating connector will have to make some careful 
> measurements to see how far to counterbore the female contact holes in 
> the front and rear contact blocks.  And I would suggest that instead 
> of populating all of the holes, populate one at each end plus only the 
> ones that you are going to actually use.  But making the rectangular 
> female contact blocks will be a lot easier than making the circular 
> ones for, for example, a U-7/U.
>
> Robert Downs
>
> Robert Downs
>
> *From:*milsurplus-bounces at mailman.qth.net 
> [mailto:milsurplus-bounces at mailman.qth.net] *On Behalf Of *Michael Hanz
> *Sent:* Sunday, June 17, 2018 12:24 PM
> *To:* B. Smith; Milsurplus
> *Subject:* Re: [Milsurplus] NOS ARR-15 / ARC-2 connectors
>
> I can share the pin measurements, but it gets a little complicated.  
> There are actually two connectors in existence - one with a _pair_ of 
> insulating blocks, and one with a _single_ insulating block.  I 
> haven't had time to take apart one with the pair of blocks, but below 
> is a (very) rough sketch of the pin that is used in the .785" thick 
> single block style.  It is designed to accept the .125" diameter male 
> pin in the radio set(s).
> Mike  KC4TOS
>
> On 6/17/2018 11:34 AM, B. Smith wrote:
>
>     Hi Robert
>     What is the source of your insert pins and by chance did you take
>     any pin measurements that you could share with us.
>     breck k4che
>
>     On 6/17/2018 12:15 AM, Robert Meadows wrote:
>
>     Just purchase the proper insert pins for pin diameter --readily
>     available
>