Chris,

Neat looking units. Have you interfaced a micro with these? If so, what =
micro did you use? What format/baud rate does the data come in?

Jonathan

www.madlabs.info

  ----- Original Message -----=20
  From: ChrisAtUpw@..........
  To: psn-l@.................
  Sent: Wednesday, February 19, 2003 4:41 PM
  Subject: Re: Atomic Time Source for data logging


  Hi Larry,=20

        HKW Electronic in Gremany sell a range of Receiver Modules and =
Decoders for 77.5 KHz, 60 KHz and 40 KHz. They list a decoder for WWVB, =
but do not seem to have an agent in the USA. See =
http://www.hkw-elektronik.de/=20

        I have used the 77.5 and 60 KHz versions of their receivers and =
the sensitivity is excellent. You can get problems from Radio =
Interference in Urban surroundings, particularly during the day when the =
signal is weaker and also from computer monitors. Local lightning can =
also cause problems, but this tend to die out during the night. I have =
tested the response at 2000 km range and got good daytime signals in =
mountain surroundings which had low signal levels, but were free from =
RFI. The 60 KHz Receiver Module MK68 + MK72 retails at about US $34 + =
Tax from www.maplin.co.uk They may be cheaper in Germany.=20

        Regards,=20

        Chris Chapman=20







Chris,
 
Neat looking units. Have you interfaced =
a micro=20
with these? If so, what micro did you use? What format/baud rate does =
the data=20
come in?
 
Jonathan
 
www.madlabs.info
 

  
----- Original Message ----- 
  From:=20
  ChrisAtUpw@....... 
  
To: psn-l@.............. 
  
Sent: Wednesday, February 19, =
2003 4:41=20
  PM
  
Subject: Re: Atomic Time Source =
for data=20
  logging
  

Hi Larry,=20
  

      HKW Electronic in Gremany =
sell a=20
  range of Receiver Modules and Decoders for 77.5 KHz, 60 KHz and 40 =
KHz. They=20
  list a decoder for WWVB, but do not seem to have an agent in the USA. =
See http://www.hkw-elektronik.de/ =

  

      I have used the 77.5 and =
60 KHz=20
  versions of their receivers and the sensitivity is excellent. You can =
get=20
  problems from Radio Interference in Urban surroundings, particularly =
during=20
  the day when the signal is weaker and also from computer monitors. =
Local=20
  lightning can also cause problems, but this tend to die out during the =
night.=20
  I have tested the response at 2000 km range and got good daytime =
signals in=20
  mountain surroundings which had low signal levels, but were free from =
RFI. The=20
  60 KHz Receiver Module MK68 + MK72 retails at about US $34 + Tax from=20
  www.maplin.co.uk They may be cheaper in Germany.=20
  

      Regards,=20
  

      Chris Chapman=20