[time-nuts] Free equipment cart for anyone willing to pick it up at near Orlando, Florida, USA
I have a "Tek Lab Cart Model 3" in pretty nice shape available for FREE. The only caviet is, you must come and pick it up yourself. I live in Zip Code 32703 which is near Orlando, Florida, USA. I cannot ship this. Please contact me off list, if interested. --- (Mr.) Taka Kamiya KB4EMF / ex JF2DKG ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
Re: [time-nuts] ESE ES-161
The ESE manuals have schematic diagram, Pictorial of parts layout on PCB, and full parts list — including the options. The parts list references internal ESE # and the OEM supplier’s part number ... so you can populate hardware for an option. In some cases for legacy ESE products, that OEM part may be discontinued (hence reason for new updated design). gb > On Mar 11, 2020, at 2:46 PM, Frederick Bray wrote: > > > Thanks for all the suggestions. I did get the publicly available manuals but > they lack the parts layout. > > I’ll go through the more formal request process for the more detailed manual. > > Fortunately, I have a similar unit but a different model and PC board. > However, I figured out where the most important DIP switch goes and tested > this by jumping the contacts. That lets me set the time offset and 12/24 > hour functions. It would be nice to add the date option, but that might take > more components. > > KE6CD > >>> On Mar 11, 2020, at 10:14 AM, Gregory Beat wrote: >>> >> >> >> You can download the manuals for current production ESE products, from their >> web site (under the specific product page). They require ID for this step. >> >> For older or legacy ESE product manuals and enclosed schematic/board layout, >> you can contact ESE support for that manual/information at +1 310-322-2136 >> or send a direct e-mail to e...@ese-web.com. >> ESE may ask for serial number of this product. The reason for this request >> is their customization work (firmware EPROM or hardware option) for >> broadcast industry & military/government clients and they note this >> internally (support) by that SN. >> >> I usually deal with Monica Trotter at ESE. >> >> g.beat >> w9gb >> == >> Date: Tue, 10 Mar 2020 23:01:57 -0700 >> From: Frederick Bray >> To: time-nuts@lists.febo.com >> Subject: [time-nuts] ESE ES-161 >> Hi, >> >> Does anyone have the manual for the ESE ES-161 display? >> >> I'm looking to add the DIP switch that permits certain options to be >> configured, but I'd like to be sure that I install it in the correct place. >> Many thanks. >> >> KE6CD >> ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
[time-nuts] Buying and using used Cesium Beam Standards
Hello Forrest, Your question regarding prolonging cesium tube life is very valid and has several answers depending on the particular situation. I can remember asking exactly the same question to the list many years ago. For the 5061A/B the answer is relatively simple. There is a 'Cs Off' switch position that turns every thing to the tube off except the vac-ion pump. This does not shorten the tube life in any way, and keeps the unit ready to use (after the Cs oven warm-up time). The downside is that you are burning power continuously to keep all the other circuitry powered. It still may take a week or so for the unit to reach its ultimate stability. Another alternative is to keep the unit powered off and just turn it on ever now and then to keep the tube pumped down, as Taka has suggested. I have a Datum PRS-50 that I treat this way (there is no way to just maintain the vac-ion pump). Another option is to keep the unit in storage and only power on when needed. This can take considerable time to pump down the tube depending on how 'leaky' it is and how much Cs is floating around inside. Some units I have seen pump down within minutes/hours, others may take weeks (and I have even had them work afterwards). Of course, once you get the unit locked it still may take a considerable time to reach thermal equilibrium and its ultimate stability. Bottom line is - if the Cs oven is running, so is the clock on your tube. Regards, Skip Withrow ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
Re: [time-nuts] ESE ES-161
Thanks for all the suggestions. I did get the publicly available manuals but they lack the parts layout. I’ll go through the more formal request process for the more detailed manual. Fortunately, I have a similar unit but a different model and PC board. However, I figured out where the most important DIP switch goes and tested this by jumping the contacts. That lets me set the time offset and 12/24 hour functions. It would be nice to add the date option, but that might take more components. KE6CD > On Mar 11, 2020, at 10:14 AM, Gregory Beat wrote: > > > > You can download the manuals for current production ESE products, from their > web site (under the specific product page). They require ID for this step. > > For older or legacy ESE product manuals and enclosed schematic/board layout, > you can contact ESE support for that manual/information at +1 310-322-2136 or > send a direct e-mail to e...@ese-web.com. > ESE may ask for serial number of this product. The reason for this request > is their customization work (firmware EPROM or hardware option) for broadcast > industry & military/government clients and they note this internally > (support) by that SN. > > I usually deal with Monica Trotter at ESE. > > g.beat > w9gb > == > Date: Tue, 10 Mar 2020 23:01:57 -0700 > From: Frederick Bray > To: time-nuts@lists.febo.com > Subject: [time-nuts] ESE ES-161 > Hi, > > Does anyone have the manual for the ESE ES-161 display? > > I'm looking to add the DIP switch that permits certain options to be > configured, but I'd like to be sure that I install it in the correct place. > Many thanks. > > KE6CD > ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
Re: [time-nuts] ESE ES-161
You can download the manuals for current production ESE products, from their web site (under the specific product page). They require ID for this step. For older or legacy ESE product manuals and enclosed schematic/board layout, you can contact ESE support for that manual/information at +1 310-322-2136 or send a direct e-mail to e...@ese-web.com. ESE may ask for serial number of this product. The reason for this request is their customization work (firmware EPROM or hardware option) for broadcast industry & military/government clients and they note this internally (support) by that SN. I usually deal with Monica Trotter at ESE. g.beat w9gb == Date: Tue, 10 Mar 2020 23:01:57 -0700 From: Frederick Bray To: time-nuts@lists.febo.com Subject: [time-nuts] ESE ES-161 Hi, Does anyone have the manual for the ESE ES-161 display? I'm looking to add the DIP switch that permits certain options to be configured, but I'd like to be sure that I install it in the correct place. Many thanks. KE6CD ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
[time-nuts] Trueposition GPSDO - patience is a virtue
Hello Time-Nuts, Wow, what a difference a day makes. Seems that the Trueposition GPSDO has a fairly low gain/long time constant in the 'normal' mode of operation. So, at startup it could not keep up with the oscillator drift. This led to it dropping into the 'acquire' mode which has higher gain/shorter time constant to reset the phase. Once the OCXO drift slowed down the 'normal' loop operation was able to handle things without a problem and it has been running in that mode continuously now. I have attached the 24 hours since start up of the 10MHz output. Yesterday's attachment was just the first couple of cycles of the reset. They did indeed slow down as the oscillator drift slowed down, and after a few hours there were no more resets. Regards, Skip Withrow ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
[time-nuts] ESE ES-161
Hi, Does anyone have the manual for the ESE ES-161 display? I'm looking to add the DIP switch that permits certain options to be configured, but I'd like to be sure that I install it in the correct place. Many thanks. KE6CD ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
