[time-nuts] HP 117/10509a

[Chuck Forsberg WA7KGX N2469R]

Some time ago I made a 60 kHz antenna by winding a zillion turns of wire
on a ferrite loopstick tuned with a padder condenser.  This connected to
the gate of a 2n4416 or mpf102.   This was quite selective and sensitive.


On 07/05/2012 02:45 AM, Tom Van Baak (lab) wrote:
> Schematics for all versions of the 10509A antenna:
> http://www.leapsecond.com/museum/10509a/
>
> /tvb (iPhone4)
>
>
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-- 
Chuck Forsberg WA7KGX N2469R     caf at omen.com   www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
   Omen Technology Inc      "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231   503-614-0430