[Milsurplus] WTD: RBM control unit plug

[Paul Thekan]

Thank you gentleman for replying to my connector search
Thank you Nick, as always, for having all that info on your excellent Web
site!!
A big Thank You to Robert W7MKA who alerted me to the PL 74 ctrs on ebay..I
looked before but found nothing..knowing PL 74 would have helped.

Thanks again..
Paul N6FEG


On Mon, Aug 3, 2026, 4:26 AM Nick England via Milsurplus <
milsurplus at mailman.qth.net> wrote:

> Looking at the Navy Type parts catalog, these connectors are similar to
> some others except for cable hole size.
> The 8 pin 49171 is almost the same as 49042 which is a PL-63.
> The 4 pin 49170 is almost the same as 49069 which is a PL-74
> So you might find some of those from Bill Perry or wherever.
> https://www.navy-radio.com/manuals/nt/NT-900109-3.49-phones_conn.pdf
>
> This catalog shows what equipment first used the part number, but not all
> uses. It includes commercial equipment numbers if there is one. Also date
> it was first added to the Navy supply system. Other types of components can
> be found at
> https://www.navy-radio.com/manuals/nt-900109.htm
>
> Cheers,
> Nick England K4NYW
> Chapel Hill NC
> www.navy-radio.com
>
> On Sun, Aug 2, 2026 at 10:52 PM hwhall--- via Milsurplus <
> milsurplus at mailman.qth.net> wrote:
>
>> The manual shows a few different connectors on the Control Unit CAY-23278
>> with 4, 5 or 8 terminals. The 5 terminal one is only for the Crystal
>> Frequency Indicator (freq meter).
>> The manual also seems to show the others have Navy type numbers "-49170"
>> & "-49171". I believe a complete part number would have the manufacturer's
>> 3-letter code in front, e.g., "CCT-49170" etc.
>> I feel sure that those plugs & sockets got used with other equipment, too.
>>
>> Wayne
>>
>> WB4OGM
>>
>> On Sunday, August 2, 2026 at 06:29:31 PM MDT, Hubert Miller via
>> Milsurplus <milsurplus at mailman.qth.net> wrote:
>>
>> I wonder if those connectors also carry different names to fit other
>> eqpt.
>>
>> At the Portland OR 'Beseda auction' of a couple years ago, there were w
>> sets of receivers and a control box. Someone had discarded the receiver
>> cabinets. Great idea ! They did not sell, went to God knows where.
>>
>> -Hue Miller
>>
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>> Sent from my Galaxy
>>
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