[time-nuts] Quieting the HP-113AR Clock/Frequency Divider

Those of us with the 1960-vintage HP-113AR/BR Clock/Frequency Divider know how noisy they are. The mechanical clock movement of my 113AR is loud enough that I really don't want to be in the same room with it. I don't know if the clocks are noisy from brand-new or if the mechanism gets noisier

[time-nuts] Furuno GT-87

The TICC reference is a HP-5071A cesium beam oscillator with high performance tube. The GT-87 is connected to the TICC channel B input. The TICC is running in timestamp mode. The orange plot is the Time Interval Error of the 1PPS signal... the difference between 1 second and the measured

Re: [time-nuts] Quieting the HP-113AR Clock/Frequency Divider

Jeremy I have heard about the old movements in time-nuts. Kind of a reason to stay clear of them for me at least. Thought they are amazing pieces of equipment, I have 4 clocks on the wall that have impulse motors. Though not loud you certainly can here the steps every second. Sounds like you have

Re: [time-nuts] Furuno GT-87

So the orange is the second to second timestamp difference minus 1s, or the period time measured every second minus 1s. As the period is very close to 1s the frequency difference just will be the negative value so what the graph shows is the same as eg Stable 32’s frequency data for 1s but

Re: [time-nuts] ULN regulator with more current capability than LT3042?

- Original Message - From: "John Ackermann N8UR" To: "Discussion of precise time and frequency measurement" Sent: Sunday, March 18, 2018 4:13 PM Subject: [time-nuts] ULN regulator with more current capability than LT3042? Reviving the

Re: [time-nuts] ULN regulator with more current capability than LT3042?

Use an LT3045, its the 0.5A version of the LT3042. Bruce > On 19 March 2018 at 09:13 John Ackermann N8UR wrote: > > > Reviving the conversation about superb voltage regulators, I am looking > for one to run the analog and PLL bits of a high performance frequency > synthesizer

Re: [time-nuts] ULN regulator with more current capability than LT3042?

Thanks, Bruce!!! On 03/18/2018 04:19 PM, Bruce Griffiths wrote: Use an LT3045, its the 0.5A version of the LT3042. Bruce On 19 March 2018 at 09:13 John Ackermann N8UR wrote: Reviving the conversation about superb voltage regulators, I am looking for one to run the analog and

[time-nuts] Looking for information on True Position GPSDO.

There is a small, about 3.5" by 4.5", GPSDO board being offered by several sellers on eBay. I bought one from what looks to be the only US based source. It is identified as True Position, Inc., and had a small CTS OCXO and Furuno GT8031 on board. I found hook up information in one of the Asian

[time-nuts] Looking for information on True Position GPSDO.

The magic word is $PROCEED. There is quite a bit of info about these on eevblog.com https://www.eevblog.com/forum/projects/gpsdo-loss-of-satellitesfix-troubleshooting/ Lady Heather v6 Beta supports these. If you have v5 installed from ke5fx.com, you can get the .exe for v6 from here or if you

[time-nuts] ULN regulator with more current capability than LT3042?

Reviving the conversation about superb voltage regulators, I am looking for one to run the analog and PLL bits of a high performance frequency synthesizer chip. The current drain looks to be about 160-180 mA at 1.8 V, which is uncomfortably close to the limit for the LT3042 (200 mA). The

Re: [time-nuts] ULN regulator with more current capability than LT3042?

Tom wrote: Run two in parallel for twice the current and less noise? This is actually a better solution than using an LT3045, for two reasons. First, as Tom noted, by paralleling two devices, the noise is reduced by sqrt 2 = ~1.4: "Designed as a precision current reference followed by a

Re: [time-nuts] ULN regulator with more current capability than LT3042?

Hi Getting the heat off of the regulator package may have other benefits ( like improved stability). A lot depends on just where the heat goes in each case ….. Bob > On Mar 18, 2018, at 4:41 PM, Gerhard Hoffmann wrote: > > > > Am 18.03.2018 um 21:13 schrieb John Ackermann

Re: [time-nuts] ULN regulator with more current capability than LT3042?

Am 18.03.2018 um 21:13 schrieb John Ackermann N8UR: Reviving the conversation about superb voltage regulators, I am looking for one to run the analog and PLL bits of a high performance frequency synthesizer chip. The current drain looks to be about 160-180 mA at 1.8 V, which is

Re: [time-nuts] Looking for information on True Position GPSDO.

I don't have one, but I see some Time-nuts posts in 2017 about this board and communications with it, such as: https://www.febo.com/pipermail/time-nuts/2017-October/107096.html https://www.febo.com/pipermail/time-nuts/2017-May/105124.html I also found:

[time-nuts] RE; True Position GPSDO.

Thanks to all who replied. You pointed me to a wealth of good information. Seems lately that I have been getting let down in my Google searches. I didn't find any of the stuff you led me to, but I should have. Hmmm. it may be because I have been using Ecosia for searches instead of actually using