[time-nuts] New to list

paul swed paulswedb at gmail.com
Thu Nov 1 17:38:40 UTC 2012


Bob exactly good for the am and sort of a front end but completely stops
being useful at that point. But still getting from 10 uv to a 1/2V thats
not all bad for a drop of glue.
Paul

On Thu, Nov 1, 2012 at 1:31 PM, Bob Camp <lists at rtty.us> wrote:

> Hi
>
> Based on a quick look - the CME8000 isn't going to be much of a help with
> the new modulation. It will do ok with the old AM format.
>
> Bob
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Mike Harpe
> Sent: Thursday, November 01, 2012 1:14 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] New to list
>
> Hi!
>
> At this point I'm mostly just trying to learn about the new signal. I
> play around with microcontrollers and have always wanted to build a
> WWVB clock. I spent a good amount of time with the CME-8000 board
> before getting frustrated with it and putting it aside for awhile. I
> found out about the BPSK experiment when I was looking around for help
> with the CME-8000 and I figured that would be the way to go now.
>
> Mike Harpe
>
> On Thu, Nov 1, 2012 at 1:08 PM, paul swed <paulswedb at gmail.com> wrote:
> > Mike
> > Welcome to the list. There have been numbers of tests since March.
> > Ultimately a more detailed specification was released thats been helpful
> in
> > understanding the new modulation.
> > In various threads I have mentioned what I have been doing. At the moment
> > modifying a spectracom 8163 seems to be a way to allow other rcvrs to
> work.
> > Not at all optimum or even close. But at least seems to have worked.
> > I am semi familiar with the chips and they are a complete rcvr. But
> really
> > do not allow direct access to the signals easily. Either you grab it past
> > the 60Khz crystal or at the output of the diode detector by removing the
> > LPF cap. Then you have to amplify detect and feed that back for AGC.
> > Something that can be done. I have not had time.
> > So a question for you is what are you attempting to do?
> > Regards
> > Paul
> > WB8TSL
> >
> > On Thu, Nov 1, 2012 at 12:43 PM, Mike Harpe <mike at mikeharpe.com> wrote:
> >
> >> Sorry if this is an FAQ...
> >>
> >> Has anything else happened with the WWVB BPSK change since the test in
> >> March?
> >>
> >> Also, I would love to correspond with anyone who has worked with the
> >> C-MAX CME-8000 boards.
> >>
> >> Thanks! I'm looking forward to participating.
> >>
> >> Mike Harpe, N4PLE
> >> Sellersburg, IN USA
> >>
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