[time-nuts] Simulating LORAN-A GRI Timing Generator
jfor at quik.com
Sat Jan 8 17:35:40 UTC 2011
That's just about what I want to do.
> Quoting "J. Forster" <jfor at quik.com>:
>> The GRI and Delay counters need to be 5 decimal digits. My current
>> thinking is manual entry of the numbers via BCD coded thumbwheel
> More than thirty years ago, I built a Rate Generator for LORAN-C
> excatly according to the above principle. It is still wandering
> at my junk box and is a three digit preset counter (3XSN7490)
> a quad input decoding gate (SN7420) and the thumbwheel switches.
> Using more or less the same principle there is also a six digit
> delay resolving one microsecond.
> They are very ancient designs but they work pretty well.
> Best regards
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