[Milsurplus] Fw: UHF Connectors

[Jim Whartenby]

A Google search found:


"The UHF RF connector was designed in the 1930s by E. Clark Quackenbush, a design engineer working for the Amphenol company. This RF connector design was aimed to cover frequencies in the range 0.6 to 300 MHz and it was aimed at use within the radio industry."

So it predates WW2 AFAIK.  Did check MIT RadLab series but didn't find anything definitive in book 11.  Military wise, if I was a betting man, first use had something to do with radar or video.  Perhaps first use was in Link or Motorola radios?Jim

      From: Mike Morrow <kk5f at earthlink.net>
 To: 
Cc: arc5 at mailman.qth.net; milsurplus at mailman.qth.net
 Sent: Sunday, May 13, 2018 5:27 PM
 Subject: [Milsurplus] UHF Connectors
  
> Speaking of "UHF" connectors, anyone know which was the first
> (US?) equipment that used an SO-239 "UHF" type connector?
> Tim N6CC

Some data;

The SO-239 (navy type-49194) connector was not yet listed in the 1940 Signal Corps General Catalog.  The Navy Type Number Table shows the nt-49194 being added in June 1942.

The USN's 1940 ZB and ZB-1 246 MHz "UHF" homing adapters utilized an early-style coax connector, but the 1942 ZB-2 and ZB-3 adapters use nt-49194 (SO-239) connectors.

The ZB-homing system (and YE transmitter) employed a frequency band (234 to 258 MHz) that was near the highest used by any military set in 1940.  That would have made the development of a suitabble coax transsmission line and connectors attractive for use as soon as possible in ZB/YE homing setz.  That UHF connector system is used the ZB-2 and ZB-3.  It is likely that those were among the first sets using SO-239-family connectors.

That's my candidate system.  What's yours?  Why do you ask?

Mike / KK5F

   

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