[time-nuts] GR Connectors

[Tom Van Baak]

> worthwhile.  I guess they can bury all this stuff with me, like King Tuts tomb...

Alternative use for your pile of surplus connectors:

http://leapsecond.com/pages/chess/

/tvb

----- Original Message ----- 
From: "Jeff Kruth via time-nuts" <time-nuts at febo.com>
To: <time-nuts at febo.com>
Sent: Sunday, May 28, 2017 8:59 AM
Subject: Re: [time-nuts] GR Connectors


> GR made several coaxial connector series: the obvious 874, the 8.5 GHz  
> very low residual VSWR GR-900 (IIRC 14 mm bore) and the GPC-7 (7 mm bore)  18 
> GHz precision connector, a very rare precursor to the APC-7 with a 1/4 turn  
> locking collar, only place I saw it was in the HP 1965 catalog, brief 
> lifetime.  I have a few in my collection of MW history stuff.
> 
> GR was the cats meow for a long time. I have a pile of the 900 & 874  
> stuff, just because I like it. The AIL hot/cold load that uses 900 is still  
> worthwhile.  I guess they can bury all this stuff with me, like King Tuts  
> tomb...
> 
> 73
> Jeff Kruth
> WA3ZKR
> 
> 
> 
> In a message dated 5/28/2017 5:53:31 A.M. Eastern Daylight Time,  
> time-nuts-request at febo.com writes:
> 
> Message:  17
> Date: Sun, 28 May 2017 05:15:52 -0400
> From: Scott McGrath  <scmcgrath at gmail.com>
> To: Discussion of precise time and frequency  measurement
> <time-nuts at febo.com>
> Subject: Re:  [time-nuts] Two pieces of old General Radio Freq. Nuts
> Message-ID:  <DAD89E1A-2704-4E79-9C02-CF331598A71F at gmail.com>
> Content-Type:  text/plain;    charset=utf-8
> 
> The GenRad 874 connector was  good to 4.5 Ghz  and took a Banana plug in 
> the center conductor without  changing electrical  characteristics!!!
> 
> http://www.ietlabs.com/pdf/GR_Experimenters/1948/GenRad_Experimenter_Oct_194
> 8.pdf
> 
> Not  bad for a connector designed in 1948!   
> 
> It was largely  supplanted by the APC-7 connector from Bunker-Ramo which 
> was also a  hermaphrodite design but had a 18 Ghz frequency limit
> 
> Lots of Tek  calibrators used this connector due to its good impedance 
> matching without  requiring obsessive connector maintenance as the APC-7 does 
> (cleaning, gauging  and finger replacement)
> 
> 
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