[time-nuts] Has anybody checked this? GPSDO in kit

Jim Sanford wb4gcs at wb4gcs.org
Sun Oct 23 14:03:13 EDT 2016


(I had one of those, 20 years ago . . . .)



wb4gcs at amsat.org

On 10/23/2016 1:49 PM, William H. Fite wrote:
> Bravo for boat anchors, Wes. I have a Collins R390 with a tuning gear train
> so complex it has to go in every 3000 miles for an oil change.
> On Sunday, October 23, 2016, Wes <wes at triconet.org> wrote:
>> On 10/22/2016 9:22 AM, Chris Albertson wrote:
>>> You have to remember what this thing replaces.   In ham radio, some people
>>> are using vacuum tube oscillators with mechanical variable capacitor
>>> tuning.  Maybe some advanced rigs use gear drive on the capacitor shaft to
>>> allow more exact tuning  This Si chip is considerably better then 1940's
>>> technology.
>> I guess my WW-II vintage BC342 receiver (that I started with and still
>> own) was "advanced".  It has an extensive gear train for tuning.
>> On the other hand my two Elecraft K3s are full of DDS and microprocessors
>> but no variable capacitors.
>> Flex radios, are direct sampling SDR and newer ones offer GPS
>> stabilization.
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