[Lowfer] Icom R75 Frequency Jumps

[Graham]

G3RUH's GPSDO uses the Jupiter's 10khz output to phase lock to a 10Mhz 
OCXO divided down to 10khz in order to discipline the oscillator.

http://www.jrmiller.demon.co.uk/projects/ministd/frqstd0.htm

and

http://www.jrmiller.demon.co.uk/projects/ministd/frqstd.htm

and N1JEZ has his own version of the G3RUH design:

http://www.ko4bb.com/Manuals/05%29_GPS_Timing/Simple_10_MHz_GPSDO_-_N1JEZ.pdf

There is a fellow on ebay selling jupiter GPS boards plus an interface 
board for a decent price called the Navman jupiter T Tu60 GPS Kit 1pps 
10khz GPS Module. He usually has an auction on the go for one and 
another listing with a "buy it now". Claims to have more than 10 and has 
already sold 100+ and will put on the type of connectors you wish.  I 
have one patiently waiting to be put in a GPSDO.

cheers, Graham ve3gtc




On 13-08-09 01:28 AM, ToddRoberts2001 at aol.com wrote:
> Pat, To lock my R75 to GPS I am using a DFS30 frequency
> tripler kit sold by Dave, G4HUP.
> I have my DFS30 hooked up to the 10 mHz
> output of a Thunderbolt GPS receiver.The DFS30 triples the 10mHz  output
> to substitute for the 30 mHz timebase in the R75.
>   
> You can learn more about the DFS30 kit here:
>   
> http://g4hup.com/DFS30/DFS30.html
>   
> The cost for the DFS30 kit is 27.50 GBP and Dave will accept  payment
> via PayPal. The kit uses surface mount components so one needs to
> be comfortable with soldering SMT if they would like to build their own
> DFS30.
>   
> Most of the Thunderbolt GPS receivers are sold out on eBay now but  there
> are a few left in the $225 price range. I have heard of some hams using a
> Jupiter GPS receiver but I am not familiar with that one. I believe the
> Jupiter
> only has a 10kHz output that needs to be multiplied up to 10mHz.
>   
> 73 - Todd WD4NGG
>