[time-nuts] FS or Swap: Oscilloquartz Model 3210 Cesium Frequency Standard

Oscilloquartz Model 3210 Cesium Frequency Standard -- This unit is from a lot of three bought around 2014, each part of a Racal Portable Frequency Standard in a short rack with backup battery power supppy. One had faults that I was unable to fix,

Re: [time-nuts] Manual: VARIAN R-20 Rubidium frequency, standard.

Hi, I scanned and uoploaded the R20 and 304D manuals to ko4bb a couple of years ago. Have a 304D which sort of works, but the meter was open circuit and had to replace with a similar sized edgwise meter, and an op amp to correct the range. Still have the original manual somewher, but the

Re: [time-nuts] Rapco 1804M manual and Control Mode Access ?

Hi, Just a note the thanks to all who helped with the info on the above gpsdo and the gps engine manuals. Now in the rack and seems rock solid compared to a 10MHz gpsdo. Looking at the Trimble manual, looks like a standard Trimble protocol. Will connect a serial analyser inline to find out

[time-nuts] Rapco 1804M manual and Control Mode Access ?

Hi, Looking for the user manual for the above gpsdo. At power up, keeps repeating gps status and time, whereas there is an internal control mode for setup. Works fine and locks to gps, but the year is stuck at 2001, suggesting a date rollover bug. Internal GPS engine a a (Trimble ?) TNL22880

Re: [time-nuts] GPS antenna splitter recommendation? (John Ackermann N8UR)

On 04/30/20 17:00, time-nuts-requ...@lists.febo.com wrote: Re: GPS antenna splitter recommendation? (John Ackermann N8UR) Usually a lurker here, but a couple of points. The best splitters are those designed for the task, such as the HP or symmetricom 4 way boxes seen from time to time on Ebay,

Re: [time-nuts] Experiments in NTP performance (Watson Ladd)

On 02/07/20 17:00, time-nuts-requ...@lists.febo.com wrote: Experiments in NTP performance (Watson Ladd) Hi, I may have something to contribute to this, Built an experimental system last year. Two or three surplus spares or repair grade and refurbished time servers on a separate subnet,

Re: [time-nuts] Trak 8810 Station Clock

On Sat Jul 20 22:15:21 EDT 2019, paul swed wrote: Chris Looked at the photos and believe you do not need a down converter. The one pix has a filter in it. dcf21r57. Its a murrata GPS bandpass filter 1575 MHz. So that indicates its looking for a antenna. See what voltage is on the antenna jack.

[time-nuts] Trak 8810 Station Clock

Hi, Bought one of the above gps clocks at a radio rally last Sunday. Looked ok on the outside, but severe corrosion from a leaked backup battery inside. Cleaned all that up, replaced some caps and a few other parts on the psu board and now at least partially working. All the menus seem to work,

[time-nuts] Symmetricom TS2100 Faults and Forgetfulness

On 12/06/18 12:23, time-nuts-requ...@lists.febo.com wrote: Esa Heikkinen I think IP address or display settings cannot be stored to that EEPROM, it contains oscillator steering parameters etc. That is because this EEPROM is write protected by jumper JP4, so any user settings cannot be there.

[time-nuts] Symmetricom TS2100 Faults and Forgetfulness

Hi, Thanks for all the replies. Looked into the Heol replacement gps module, bit bullet and ordered one. Arrived today and on re power up, the system was tracking 8 satellites 3D in 3 or 4 minutes. Quite impressive really and a great improvement on the original module, even without the

[time-nuts] Fwd: Symmetricom TS2100 Faults and Forgetfulness

Original Message Subject: Symmetricom TS2100 Faults and Forgetfulness Date: Mon, 26 Nov 2018 18:31:30 + From: Chris Quayle To: time-nuts-requ...@lists.febo.com Hi, Question for the group. Have a Symmetricon TS2100 which has faults. It's been some time since it was last