W5OLF's blog

New WSPR YouTube Video Showing Operation of VCXO-AXE

Hi, W7FJ put up a video of my VCXO-AXE using a GymBoss as a timer:


I also want to point out that there is an accessory timing board that I developed
which I have used for over two months continuous without synchronization loss.

Anyway thanks to a user for the youtube video; thought others might be interested.

Jay, W5OLF

Closet WSPR - Observation/Questions

Hi, I have been using my WSPR-AXE standalone transmitter, now with a continuous transmitting 40% duty cycle 1 PPS timing daughter card. The interesting thing is that it is using a 15 inch ferrite loopstick antenna located on the second floor of my townhouse; in a closet. 1W directly into the antenna. The spots below are typical of the reporting:

2011-10-29 02:50 W5OLF 10.140191 -26 0 DM79 1 VE6PDQ/1 DO33fl 1684 340
2011-10-29 02:44 W5OLF 10.140177 -19 0 DM79 1 KC9NBV EM69oe 1567 85
2011-10-29 02:04 W5OLF 10.140190 -25 0 DM79 1 VE6PDQ/1 DO33fl 1684 340

That is the observation that there are many - and in this case extreme - antenna solutions that allow you to get out with 1W using WSPR. The question is why do I use 1W versus a more realistic 10mW (-20 dBi gain) when sending out my transmissions? Why do we not all estimate effective radiated power because in this extreme case 1W is not the interesting thing, antenna experimentation is?

If anyone is interested I can send a picture of the 'test setup'. 73's, Jay, W5OLF

WSPR Beacon on Ebay

Have a WSPR beacon kit project posted on Ebay (search in Ebay with "QRP WSPR" term). Would like to use this blog to answer questions about this kit that anyone may have and encourage others to experiment with simple WSPR transmitters with no computer required. Great for portable expermental work. Any comments welcome, Jay, W5OLF

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