I think I may actually have the ability to read the tube output directly using a resistivity meter that I have and disabling the HV. Just using the rcv side. See if I can see any output from the em I suppose if the ionizer were wrong the illumination to the tube might be off. Given some of the tune details I have seen lately.
On Fri, Oct 23, 2009 at 1:27 PM, paul swed <[email protected]> wrote: > Well I may be striking out here. > Ionizer seems fine > Did find the 3500 V supply at 3750 > Reduced with a 100 ohm R in the 18.75 feeder > Tried the LF coil no luck on the tube no reading > Checked ac amp lots of gain 80+db also fiddling around with that cable > input did make the I beam meter move. > So that circuits good. > Checked the 90 MHz and 12.63 MHz both good. Discovered by the 12.63 the > system is set for atomic time. > About all thats left is to pull the frequency multiplier and check the 9GHz > sig. > But I believe the LF coil would have proved that and it did not. > I sense the EM is DOA. > > I need to study up on those. But I speculate the only thing that runs that > is is the -2500V. > When I have seen them at hamfests I am unsure anything could go wrong with > them. > Do not recall a filament. That would basically leave me perhaps a open R in > the multiplier string. > > Its a shame because this is a very clean 5061from the Naval Observatory. > > > > > > On Wed, Oct 21, 2009 at 2:45 PM, John Miles <[email protected]> wrote: > >> That'd most likely be normal. The filament behaves just like a light bulb >> in that regard. The supply can't deliver 10 amps, presumably, so if it >> can >> put 1 volt across it, the resistance should be in the right ballpark. >> >> -- john, KE5FX >> >> > -----Original Message----- >> > From: [email protected] [mailto:[email protected]]on >> > Behalf Of paul swed >> > Sent: Wednesday, October 21, 2009 5:03 AM >> > To: Discussion of precise time and frequency measurement >> > Subject: Re: [time-nuts] hp5061a/b no I beam current >> > >> > >> > Anyone ever see an ionizer short? >> > I am reading .1 ohm, though like a light bulb maybe it goes up when hot. >> > That seems low though at 1 volt and 1 amp maybe not. >> > Your comment of 1-2 ohms is not what I am seeing. Though I do see >> > 1 v across >> > it in operation. >> > >> > On Tue, Oct 20, 2009 at 5:21 AM, John Miles <[email protected]> wrote: >> > >> > > >> > >> >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
