[time-nuts] New WWVB modulation format receivers (NOT)
jfor at quikus.com
Fri Feb 21 13:57:59 EST 2014
500 GHz ? Really? How? Even counting 100 GHz is pushing it.
You mean MHz, no?
> Well if we are talking about $50 then you have my attention.
> No I am not afraid to use a soldering iron. Amateur radio is not my main
> interest here. I have the same compulsion many of you out there seem to
> have, that if I can get more accuracy I want it. I get that content smile
> on my face when my counter reads a string of zeroes on a measurement that
> is supposed to do just that.
> I am doing a lot better than 1 ppm right now. I have my counter and
> signal generator agreeing within about 1 Hz at over 500 GHz. When I get
> one beat in 10 seconds against 20 MHz WWV I have 5 ppb I think. I am
> close to that but it gets sticky using 20 MHz to communicate, plus the
> signal is only available in my location for a few hours on most days.
> I am doing similar things with voltage but you can't communicate voltage
> over the radio so I don't have that kind of agreement, more like 50 ppm.
> It's all in fun; I have no legitimate need for this accuracy.
> On Friday, February 21, 2014 10:26 AM, Chris Albertson
> <albertson.chris at gmail.com> wrote:
> On Fri, Feb 21, 2014 at 9:47 AM, Bob Albert <bob91343 at yahoo.com> wrote:
>> I looked on line and it seems that these receivers are available for
>> about $150 and up. A little out of my price range right now but I'll
>> keep my eyes open.
> Watch the thread on this list about the Arduino based GPSDO. I think
> you can get the price down to $50. If all you need is something to
> calibrate frequency counter then all you need is 9 to 10 digit
> I'm going to do this just to prove it can be done for a low two figure
> price. But first I have to find a decent crystal oscillator that does
> not use up 1/2 of my $40 budget.
> If you want ultimate precision that you need a good GPS antenna in a
> good location, A high-end timing mode GPS receiver and a high-end
> double oven quartz oscillator. The cost adds up. But I think if you
> relax the specifications and shoot only for 9 to 10 digits you can
> greatly reduce the price.
> Chris Albertson
> Redondo Beach, California
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> and follow the instructions there.
More information about the time-nuts