[time-nuts] time-nuts Digest, Vol 168, Issue 24

Joseph Gwinn joegwinn at comcast.net
Sun Jul 29 10:12:44 EDT 2018


On Fri, 27 Jul 2018 12:00:02 -0400, time-nuts-request at lists.febo.com 
wrote:
> Message: 2
> Date: Thu, 26 Jul 2018 12:45:47 -0700
> From: W7SLS <w7sls.scott at gmail.com>
> To: time-nuts at lists.febo.com
> Subject: [time-nuts] 10 MHz 'failover' switch?
> Message-ID: <A60ED8A5-90F7-4752-B723-53FE623DF479 at gmail.com>
> Content-Type: text/plain;	charset=utf-8
> 
> Hello,
> 
> Looking for recommendation for a ?failover? or ?redundant? switch for 
> 10 MHz distribution.
> 
> 	Not really sure of the correct term.
> 	Something that sensed RF on primary 10 MHz, and then switched to 
> secondary on fail of primary.
> 
> A brief search showed several very nice $$$ items, suitable for 
> commercial applications,
> but I wonder if there are some ?last year?s? (but not last century) 
> versions that would work for a home lab.
> 
> Context:
> 
> I have a GPSDO and a Rb source of 10 MHz.  
> The power supply on the GPSDO failed (worked enough to light up the 
> GPSDO, but not enough to lock).
> I have a new power supply on order, but would be nice to have ?insurance?.
> 
> Thanks in advance for the group bandwidth.
> 
> Scott
> W7SLS
> 
> End of time-nuts Digest, Vol 168, Issue 24
> ******************************************

There is a Time-Nut level answer: US 9,261,587 "Methods and apparatus 
for highly reliable signal distribution".  The key is that only one 
reference is allowed to sing at any time, greatly reducing leakage and 
the resulting phase disturbances.  (The references are not turned on 
and off.)

Joe Gwinn



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