[time-nuts] 75Z vs 50Z for GPS receivers (was Re: ACE-III GPSreceivers (Dr Bruce Griffiths))

Mike Suhar msuhar at woh.rr.com
Sun Jan 28 08:33:56 EST 2007


RG62 was also used for the interconnection between the Heathkit SB303
receiver and SB401 transmitter.  I thought that was a strange choice of
cables but at the time there were miles of the stuff being used for IBM 3270
terminals as noted below.

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Poul-Henning Kamp
Sent: Sunday, January 28, 2007 6:20 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 75Z vs 50Z for GPS receivers (was Re: ACE-III
GPSreceivers (Dr Bruce Griffiths))

In message <45BC85F5.8010708 at xtra.co.nz>, Dr Bruce Griffiths writes:


>93 ohm RG62 cables with BNC connectors are not unknown, they were used 
>in some nuclear instrumentation.
>I have a few of these lying around.

Other uses:
	93 Ohm:	IBM 3270 terminal cabling
	75 Ohm:	Practically all telecoms
	50 Ohm: Thin ethernet.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

_______________________________________________
time-nuts mailing list
time-nuts at febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts




More information about the time-nuts mailing list