Re: [time-nuts] FE5680 Frequency adjustment voltage range
Suspect thats adjusting the c field. Would not hurt especially if the unit was used/surplus. Try 4000. On Mon, Feb 15, 2010 at 12:44 AM, Raj vu2...@gmail.com wrote: In my FE5680, I find that the trimpot for frequency adjust at one end 4.4V. The upper and lower voltages are 4.4 and 5.2 approx. Does this mean it is at the end of its life? There is a 4750 Resistor connected to the low end of the trimpot whose value can be reduced as a solution. Any experiences? Regards -- Raj, VU2ZAP Bangalore, India. ___ 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. ___ 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] FE5680 Frequency adjustment voltage range
Hi There is a lot of data on the small FE rubidiums out there. They appear to have re-packaged the same basic electronics into several different packages. You may want to dig into some of the other models to get a complete idea of what's going on with your unit. I would not worry a lot about the trim range until the unit has been on power for at least a month. Bob On Feb 15, 2010, at 12:44 AM, Raj wrote: In my FE5680, I find that the trimpot for frequency adjust at one end 4.4V. The upper and lower voltages are 4.4 and 5.2 approx. Does this mean it is at the end of its life? There is a 4750 Resistor connected to the low end of the trimpot whose value can be reduced as a solution. Any experiences? Regards -- Raj, VU2ZAP Bangalore, India. ___ 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. ___ 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] FE5680 Frequency adjustment voltage range
I tried a 470 in parallel and the min. voltage came down to 3.6 or so. This did not seem to help much. 20:00 here, will try and experiment tomorrow. A schematic would help to understand this. Any available ? There seems to be more trimpots and a couple of buttons the functions I have no clue about. Suspect thats adjusting the c field. Would not hurt especially if the unit was used/surplus. Try 4000. On Mon, Feb 15, 2010 at 12:44 AM, Raj vu2...@gmail.com wrote: In my FE5680, I find that the trimpot for frequency adjust at one end 4.4V. The upper and lower voltages are 4.4 and 5.2 approx. Does this mean it is at the end of its life? There is a 4750 Resistor connected to the low end of the trimpot whose value can be reduced as a solution. Any experiences? Regards -- Raj, VU2ZAP Bangalore, India. ___ 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] FE5680 Frequency adjustment voltage range
Hi In general there are no real schematics available on any of these compact Rb's. Many of the extra post and jumpers are related to setting up the physics package. Without a very good understanding of what they do, you really can't touch them. Since the unit can be digitally tuned, I would guess you might find that it's set one step to high or low on the digital tune. The digital tune is easily reversed it you get it wrong Bob On Feb 15, 2010, at 9:37 AM, Raj wrote: I tried a 470 in parallel and the min. voltage came down to 3.6 or so. This did not seem to help much. 20:00 here, will try and experiment tomorrow. A schematic would help to understand this. Any available ? There seems to be more trimpots and a couple of buttons the functions I have no clue about. Suspect thats adjusting the c field. Would not hurt especially if the unit was used/surplus. Try 4000. On Mon, Feb 15, 2010 at 12:44 AM, Raj vu2...@gmail.com wrote: In my FE5680, I find that the trimpot for frequency adjust at one end 4.4V. The upper and lower voltages are 4.4 and 5.2 approx. Does this mean it is at the end of its life? There is a 4750 Resistor connected to the low end of the trimpot whose value can be reduced as a solution. Any experiences? Regards -- Raj, VU2ZAP Bangalore, India. ___ 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. ___ 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] FE5680 Frequency adjustment voltage range
Thanks Bob, As you guys mentioned its addictive ! I was planning to use these units as a quick frequency reference.. warm up for a short while and then use as reference. My GPSDO seems to be fine! I am comparing the GPSO with the Rb unit.. maybe the GPSO is off ?? this is a one clock, two clocks, three clocks comparison syndrome.. There is a lot of data on the small FE rubidiums out there. They appear to have re-packaged the same basic electronics into several different packages. You may want to dig into some of the other models to get a complete idea of what's going on with your unit. I would not worry a lot about the trim range until the unit has been on power for at least a month. Bob On Feb 15, 2010, at 12:44 AM, Raj wrote: In my FE5680, I find that the trimpot for frequency adjust at one end 4.4V. The upper and lower voltages are 4.4 and 5.2 approx. Does this mean it is at the end of its life? There is a 4750 Resistor connected to the low end of the trimpot whose value can be reduced as a solution. Any experiences? Regards -- Raj, VU2ZAP Bangalore, India. ___ 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] FE5680 Frequency adjustment voltage range
Hi The GPSDO should be pretty good at reporting it's own health. Lady Heather and the other programs are very useful to decode the binary stuff that the GPSDO's commonly put out. If everything has been on for a week or so, I would trust the GPSDO to be close enough to tell you what's going on. Bob On Feb 15, 2010, at 9:46 AM, Raj wrote: Thanks Bob, As you guys mentioned its addictive ! I was planning to use these units as a quick frequency reference.. warm up for a short while and then use as reference. My GPSDO seems to be fine! I am comparing the GPSO with the Rb unit.. maybe the GPSO is off ?? this is a one clock, two clocks, three clocks comparison syndrome.. There is a lot of data on the small FE rubidiums out there. They appear to have re-packaged the same basic electronics into several different packages. You may want to dig into some of the other models to get a complete idea of what's going on with your unit. I would not worry a lot about the trim range until the unit has been on power for at least a month. Bob On Feb 15, 2010, at 12:44 AM, Raj wrote: In my FE5680, I find that the trimpot for frequency adjust at one end 4.4V. The upper and lower voltages are 4.4 and 5.2 approx. Does this mean it is at the end of its life? There is a 4750 Resistor connected to the low end of the trimpot whose value can be reduced as a solution. Any experiences? Regards -- Raj, VU2ZAP Bangalore, India. ___ 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. ___ 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.
[time-nuts] D style connector with coaxial insert
Hi Guys, Sorry if this is a re-occurring topic. I have a 100323-001 Rubidium Oscillator that I would like to get working. It uses one of those hybrid pinned/coaxial connectors. Roughly the size of a 15 pin D type but with a small coaxial connector embedded in the middle. I recall there being a discussion about these on the list sometime ago but I have been unable to locate the original mailings. Can someone point me to the make/part numbers or even a source? Thanks for he help and all the great info... Shawn ___ 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] D style connector with coaxial insert
Hi Quick summary of past threads: The loose parts to make a connector are available. They aren't cheap. The tools needed to properly crimp the connectors are a lot of money. The same sort of coax inserts were / are used on Sun video terminals. The cables for them are a good source of wired inserts. Soldering a coax to the connector is one solution to the problem. Bob On Feb 15, 2010, at 3:52 PM, Shawn Tayler wrote: Hi Guys, Sorry if this is a re-occurring topic. I have a 100323-001 Rubidium Oscillator that I would like to get working. It uses one of those hybrid pinned/coaxial connectors. Roughly the size of a 15 pin D type but with a small coaxial connector embedded in the middle. I recall there being a discussion about these on the list sometime ago but I have been unable to locate the original mailings. Can someone point me to the make/part numbers or even a source? Thanks for he help and all the great info... Shawn ___ 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. ___ 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.
[time-nuts] What is it ??
Just picked up a GPS Adapter made by Enhanced Messaging Systems no luck on the web on this item.. Can anyone help Thanks Tom ___ 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] What is it ??
Do you have a description ? Picture? Connector and cables attached to this item ? It may be similar to another brand ? Is it possible to dissemble the item and check inside. Stanley Just picked up a GPS Adapter made by Enhanced Messaging Systems no luck on the web on this item.. Can anyone help Thanks Tom ___ time-nuts mailing list -- time-nuts@febo.com To subscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ 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] What is it ??
Hi Could be something as simple as the external antenna for a GPS enabled gizmo. It could also be one of the many serial GPS hockey pucks that were a common add on for PC's 10 years ago. Pictures would be nice Bob On Feb 15, 2010, at 9:21 PM, Stanley Reynolds wrote: Do you have a description ? Picture? Connector and cables attached to this item ? It may be similar to another brand ? Is it possible to dissemble the item and check inside. Stanley Just picked up a GPS Adapter made by Enhanced Messaging Systems no luck on the web on this item.. Can anyone help Thanks Tom ___ time-nuts mailing list -- time-nuts@febo.com To subscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ 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. ___ 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] What is it ??
Stan and Bob it has two RJ conn. one tag as GPS RS485 the other GPS RS232 it also has two USB marked Precise Time Network (PTN) and the one label I forgot to say GPSAD Emulator Trimble Does this thing emulate GPS for testing Tom - Original Message - From: Stanley Reynolds stanley_reyno...@yahoo.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Monday, February 15, 2010 9:21 PM Subject: Re: [time-nuts] What is it ?? Do you have a description ? Picture? Connector and cables attached to this item ? It may be similar to another brand ? Is it possible to dissemble the item and check inside. Stanley Just picked up a GPS Adapter made by Enhanced Messaging Systems no luck on the web on this item.. Can anyone help Thanks Tom ___ time-nuts mailing list -- time-nuts@febo.com To subscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ 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. ___ 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] What is it ??
Hi Sounds like the RS-484 terminator for one of the serial remote GPS receivers. Bob On Feb 15, 2010, at 9:38 PM, Tom Taft wrote: Stan and Bob it has two RJ conn. one tag as GPS RS485 the other GPS RS232 it also has two USB marked Precise Time Network (PTN) and the one label I forgot to say GPSAD Emulator Trimble Does this thing emulate GPS for testing Tom - Original Message - From: Stanley Reynolds stanley_reyno...@yahoo.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Monday, February 15, 2010 9:21 PM Subject: Re: [time-nuts] What is it ?? Do you have a description ? Picture? Connector and cables attached to this item ? It may be similar to another brand ? Is it possible to dissemble the item and check inside. Stanley Just picked up a GPS Adapter made by Enhanced Messaging Systems no luck on the web on this item.. Can anyone help Thanks Tom ___ time-nuts mailing list -- time-nuts@febo.com To subscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ 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. ___ 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. ___ 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] D style connector with coaxial insert
Thanks Guys! I found the connector at Mouser and have a few on order. BTW, is there any info out there on the 100323-001? It seems similar to the FRS series. Shawn On Mon, 2010-02-15 at 16:06 -0500, Bob Camp wrote: Hi Quick summary of past threads: The loose parts to make a connector are available. They aren't cheap. The tools needed to properly crimp the connectors are a lot of money. The same sort of coax inserts were / are used on Sun video terminals. The cables for them are a good source of wired inserts. Soldering a coax to the connector is one solution to the problem. Bob On Feb 15, 2010, at 3:52 PM, Shawn Tayler wrote: Hi Guys, Sorry if this is a re-occurring topic. I have a 100323-001 Rubidium Oscillator that I would like to get working. It uses one of those hybrid pinned/coaxial connectors. Roughly the size of a 15 pin D type but with a small coaxial connector embedded in the middle. I recall there being a discussion about these on the list sometime ago but I have been unable to locate the original mailings. Can someone point me to the make/part numbers or even a source? Thanks for he help and all the great info... Shawn ___ 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. ___ 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. ___ 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.
