[600MRG] 137kHz WSPR Ultimate driver qrp labs

[Brian Pease]

I have just gotten the Ultimate 3 running.  I must have a "good"DSP 
board because the frequency stability seems excellent without GPS. I do 
have the airtight box and DDS heat sink.  I have a GPS disciplined 
HP3586C receiver/counter to check it.  The clock is keeping better time 
than this laptop.  It will be trivial to adjust the time with the newer 
firmware by simply measuring the freq of the 20MHz oscillator.  My lab 
stays pretty constant temp within 5 degrees.  The display on the U3 is 
great, and no computer needed.
Yes, the GPS calibrate mode starts when xmit stops
On 11/29/2013 6:50 PM, Laurence KL7 L wrote:
> Brian - how do you find
>   The freq stability and timing?  also using the Ultimate 2 here on 600m (and 137) and works fine with gps freq input. I did try to key in in "transmit" mode constant carrier and keying the rf via a reed relay and serial rts option on opera but it wasnt able to calibrate as on all the time (i think) - but a great little tx for a few bucks. Wspr/qrss/cw/helli all work great...
>
> Got a ultimate 3 kit waiting to be built...
>
> laurence KL7L WE2XPQ
>
>
>> On Nov 29, 2013, at 2:07 PM, "Brian Pease" <bpease2 at myfairpoint.net> wrote:
>>
>> Just for fun I am test running a Ultimate 3 kit transmitter on 137.500kHz WSPR at 100mw with a full-size horizontal monopole. WG2XKA heard it at 65 miles mid-day.
>>
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