[time-nuts] HBG clocks

[Murray Greenman]

Marco,
I have had an HBG-controlled clock for some years. Not that it ever received 
HBG at this range! The clock is an 'Irox HB13P' projection clock, and has 
the logo 'Official Swiss Time' on the front, which you can clearly see at 
http://www.irox.com/Web/en/Products/Archive/HB13P.htm.

The user manual describes that it is controlled by HBG, which it checks once 
per hour. On the company's web site, 
http://www.irox.com/Web/en/Products/Clocks.htm, my clock is no longer listed 
as current, and I note that all the current models with LF receivers are 
quoted as DCF77 models.

The HB13P is no great timekeeper on its own without HBG. I have to manually 
change it for daylight saving every 6 months, and each time I do I have to 
also advance it several minutes. So clearly it has an offset of around 
10ppm, never mind how much it varies with temperature.

73,
Murray ZL1BPU