Hello all,
Build the UQRSS for 30 M a few days back and started without the use of GPS.
Nice kit to build! Thanks QRP-kit team!
Changed the capacitors C4 for 22 pF N750 and C5 for 15 pF N750.
Looks it stays better on QRG using N750 then N0.
Have to experiment with C3 with a N750, see what it brings in Temperature compensation.
But that is a long process, will take a few weeks...
Anway I started with WSPR, in the menu put in the Time (hours and minutes) and hit the button there when at a DFCC clock the seconds jumped from 59 seconds to 00.
It seems that in this way the DT is nor far off in WSPR, about 1 second.
Results were fabulous running 0.2 Watt on my Indoor magnetic loop of 1.5 by 1.5 meter.
2012-08-28 06:52 PA0OCD 10.140179 -23 -1 JO22li +23 0.200 KC9NBV EM69oe 6775 4210 .
So a 6775 km is not bad hi.
The time without use of GPS stayed very precise! during a day or so.
But have seen in the messages here, that it will stay longer precise.
I monitored WSPR on a second notebook and a precise homebuild transceiver locked on a double oven OCXO 10 Mhz standard.
After that I used GPS to see what that brings.
I have a old GPS Jupiter T Firmware V1.80 and used 10 K pull up resistors from the +5 volt from the Data and 1 PPS line. This one uses an extern antenna and has for both the module and antenna + 5 volt powersupply via the UQRSS. Without the use of these pull-up resistors the UQRSS goes wild in adjusting the QRG hi
The other GPS is an EM-406A also using 10 K pullpup resistors and has a internal antenna. Nice little module and with a very high sensitivity. Also +5 volt power supply.
Used them both.
For WSPR it is with firmware UQRSS 1.04 nice to see the right QTH locator and precise timing.
After that I put on FSKCW3 with Frame 10 and Start 1 at 10.140.080 with a shift of about 6 Hz. In the menu GPS ON.
Let it run for a few days and could see my signal on the grabber of Bill W4HBK (Tks Bill!), also a nice distance of about 7522 km...No stacking of the pictures needed yet.
The GPS adjustment was nice to see and was soon withing 1 Hz.
The timing was also good. The first Character was send after
a 3-5 seconds (about) after the startminute (Start 1).
BUT:
A: After a few hours, the display showed a not changing time of 12.28.36 or 05.28.36 or 08.28.36..... The character being send were not showed any more...
This was the case with both GPS modules.
The GPS adjustment an timing were still ok! and the characters were still being send. (hi)
After starting the FSKCW3 mode 2 times , not one time!, all was running well and the time showed ok in the pause when the message had been send (PA0OCD JO22) and the start of the minute 1.
(Frame 10 Start 1).
This time it stopped at 11.18.36 (put it on at 10.24 utc)...
B: Then I removed the powersupply and put it on after a while.
The FSKCW 3 started automatically BUT not at the right time and the display was also not showing the right time.
After starting (with the powersupply on) the FSKCW3 2 times all was
well again.
Perhaps I had to wait a bit longer then 10 minutes to see if the Time was right again by itself...
I still have to test the other modes.
That was my experience up to now.
Will build the other UQRSS modules, but perhaps with 1 display, not sure if I can switch the display between the other modules while they are running...
73
Paul, PA0OCD
