[time-nuts] FS: Stanford SR620 counter + SR625 prescaler/rubidium reference

All, I'm shedding some equipment and on the chopping block is my Stanford SR620 counter with the SR625 2 Ghz prescaler and rubidium reference. It's been a great counter, and I'm sad to see it go, but I need to sell some stuff to pay for some unexpected, large expenses. I wanted to put it up here

Re: [time-nuts] HP 53132A Display

Hi Bert, Disconnect filament from PCB (one end is enough) and connect to regulated DC Power supply. Adjust voltage to 8V and current to 0.3-0.4A. In a dark room should see very small red light. Slowly increase little bit voltage until color goes to orange-yellow. Important - do not move

Re: [time-nuts] HP 53132A Display

N0QO fixed his display in one of his units. I have forwarded your email to him. If you forward me your direct e-mail address, I will pass it on. Rob NC0B -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bert Kehren via time-nuts Sent: Friday, April

[time-nuts] HP 53132A Display

Did buy a HP53132a counter mainly to use with the RS 232 for high resolution and to have a backup for my very favorite 5345a with 40 GHz head. Sadly the very clean unit has a very weak display to the extend that an 8 looks like a 9. Have the option for a full refund but would like to

[time-nuts] HP 5335 Manual

The manual has been sold. Regards, Perrier ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] Lightning 1, tbolt 0.

Hi Like many others, I have had no problems with the Maxim RS-232 chips running at 3.6V. They have a nice table in the data sheet that includes the proper caps for 3.6V operation. The data sheet clearly states that they will run from 3.0 V to 5.5V supplies. They call out the capacitor values

Re: [time-nuts] Lightning 1, tbolt 0.

On Apr 1, 2016 00:10, "Mark Sims" wrote: > > On the subject of RS-232 converter chips... I have had problems running MAX3232's at 3.6V. Sometimes they work, sometimes they don't. Sometimes they get freaky hot. The general symptom seems to be no -6V output. Are the

[time-nuts] Lightning 1, tbolt 0.

On the subject of RS-232 converter chips... I have had problems running MAX3232's at 3.6V. Sometimes they work, sometimes they don't. Sometimes they get freaky hot. The general symptom seems to be no -6V output. I've never had problems running MAX232A's at 3.6V, even though they are

Re: [time-nuts] Trimble Thunderbolt GPSDO Troubleshooting

All, Okay, those two parts worked! The 5V reference plus replacing that opamp repaired the unit to working. Amazing accuracy when my counter is at a 10sec gate (off by all of 0.5hz, which is well within my uncertainty of my counter (Racal-Dana 1992)). Also of interest is the unit went from