Thanks for the on & off-list responses folk. Sadly I didn't have a usable RS232 adapter set when I first powered this on a month back. It's actually on a desk I'm borrowing in Sunnyvale[1] (California), hoping to determine if it's worth the significant cost of shipping it home to Sydney[2].
I don't have a 3kV supply myself, nor do I have a lab where I'd feel safe messing with that sort of thing (the labs I could borrow around here are all shared, and 3kV is not something leave where random people could touch). I guess I'll leave it for another month or so, hopefully in that time I'll be able to see if there's an improving trend. 1: Just a few blocks from Stanford Research who, by the way, I'm not having any luck trying get some replacement feet from, for some kit that used to be rack mounted. 2: It's much cheaper if I were to pull the tube, since I could then just take it as luggage on a flight home. But it'd make more sense to have it dropped off to Microsemi for a tube swap, and have them ship it back to Australia for me. Either way, that's a chunk of money I'm not sure I want to pay right now. On 20/06/18 16:52, paul swed wrote: > Julien > Do you see any reduction in the current. It may be slight. If so time is > your friend. Let it cook. > If not KE5FX is a time nut also. Here is what he did. > http://www.ke5fx.com/cs.htm > Granted you need a 3KV supply and it is hazardous. I am not an expert on > your tube. > Others may have better insights. > Good luck. > Regards > Paul. > > On Wed, Jun 20, 2018 at 7:32 PM, Julien Goodwin <time-n...@studio442.com.au> > wrote: > >> I recently picked up a used Cs clock (Symmetricom labelled Cs4000). >> >> Sadly, it turns out to have been stored for about a year (at least, a >> year since it was last claimed to lock) and doesn't appear to be locking. >> >> I've had it on for about a month now, and ion pump current is still >> quite high[1]. >> >> Given the unit is now over 10 years since manufacture, with power on >> hours of ~5 years I'm guessing this now probably has a dead tube, and >> unless I want to spring for a new tube I have a paperweight. >> >> 1: Monitor3 display for the unit including the alarm window: >> https://julien.studio442.com.au/images/cs4000_monitor3.png >> (That's the set that fires after alarms are cleared) >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com >> To unsubscribe, go to https://lists.febo.com/cgi- >> bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > https://lists.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to https://lists.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
