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A 25 MHz tcxo may be a good idea then, I guess. Sverre La3za ons. 23. jun. 2021, 20:14 skrev Erik Kaashoek <erik@...>:

The measurement time is adaptive based on the measured error. When the error is less than what can be observed in the measurement time the measurement time increases. With 400 seconds to count the

This article <https://en.wikipedia.org/wiki/GPS_disciplined_oscillator> talks about potential problems with a 1PPS reference in GPSDO (GPS Disciplined Oscillator) circuits. If using 1PPS to stabilize

I downloaded the PD0EK version of the F2DC software and have had it running for a while. I'm using it with the QLG-1 GPS from QRPLabs. What I find is that the measurement gate with time goes from ...

I'm afraid it disappeared -- HBTE Files section: /g/HBTE/files Erik, PD0EK

Hi you could share the arduino firmware

Gerry, I would, but unfortunately they are all spoken for. You can use the Gerber files to get boards made. I use JLCPCB. They are cheap and I've never had any problems with their work. -- John P.

I'm interested John. Would you ship to Ireland? Edit: there is no license in the repository. Do you have any particular license in mind? As it stands nobody can legally make use of the designs.

I still have 2 PCBs available. Get 'em while they're hot! -- John P. WA2FZW

In the May 2021 edition of QST Magazine, Stan Johnson (W0SJ) published an article describing a device one can hook to an oscilloscope to turn it into a time domain reflectometer (TDR). Stan built his

The following files have been uploaded to the Files area of the [email protected] group. * /iw5bsf adf4351 pll spurios/adf4351 spuriosa.jpg ( /g/HBTE/files/iw5bsf adf4351 pll

Thanks everyone for the encouraging comments, I am thoroughly enjoying building something so seemingly simple but quite complicated when you get down to the details of it. I had a look at the QST

my folder file iw5bsf Hello unfortunately the image with the lost spurious I solved it by welding a few pieces of sheet metal under the pcb and the central dissipation hole adf4351 the poor laminate

I am still getting what must be a loss of pps at the nano. ?I tried the original code from F2DC where this condition drives the error factor to extremes and it does not recover. Gary W9TD

Very cool project! Yeah, Nick, I remember that series and have a copy somewhere in my stack of stuff. Also that same year QST had another 8-part series by Doug Demaw called “Learning to Work with

Erik, I may have figured out why I was getting the skips in the 1pps. I did not have the TP5 configured, just the default on the TP. In TP5, you can have the pulse output continue during system

Very nice. Makes me think of a series in QST back in 1976 I think, that may have been called “Learning to Work with Integrated Circuits” or similar. The heart of the thing produced a frequency

Hi Elia.? Love the project!? Reminds me of being at university when we had to buy a specified multimeter kit (analogue).? We were provided (if my memory serves correctly) with the circuit, required

Sorry thanks info? adf4351 pll 73 de iw5bsf Roberto

I built the? Marcus one. Has been in service for over 3 years. As you say " Cheap and dirty " .... Have never had to do anything to it. Is set for 10.000000 mhz. and stays there. My freq counter? a