> To me it looks more like water ingress through micro-cracks in the > plastic-dome, and the O-ring did its job and kept that water in.
Interesting. That's the first we've heard about micro-cracks in the Radome but that's certainly a likely possibility with such a long exposure to U/V. The more common failure mode reported was moisture ingress due to "breathing;" the uptake of moisture laden air past the O-Ring, due to a small pressure differential. But, once the moisture was inside, it was also trapped internally by the O-Ring. This condition was reported more often in geographic areas that experienced a wide variation in barometric pressures. Art -----Original Message----- From: Poul-Henning Kamp <[email protected]> Sent: Sunday, November 29, 2020 11:19 PM To: Discussion of precise time and frequency measurement <[email protected]>; Art Sepin <[email protected]> Subject: Re: [time-nuts] EOL Motorola Oncore Remote Antenna -------- > It's obvious from the photo that the O-Ring seal failed its purpose > over its many years of service. Has the unit totally failed or does the > electronic portion still function? No, the electronics is stone dead. To me it looks more like water ingress through micro-cracks in the plastic-dome, and the O-ring did its job and kept that water in. The microcracks are uniform and seem to follow the molding flow, and that is probably to be expected in our climate: We have a lot of humid freeze-thaw cycles. I wonder if buffing the radomes with car-wax would help ? > I said lucky because I found some GSynQ parts here in an engineering > storage cabinet that we can send to you at no charge to revive your unit. Thanks for the offer, but dont bother: I had a spare on hand, and I may still have third one lying around somewhere. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [email protected] | 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 -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
