VK6ZRY's blog
30M Mysterious signals just above WSPR
Submitted by VK6ZRY on Thu, 2012/01/12 - 19:41Since I started WSPRing 3 years 38 weeks ago on 30M, I have heard data signals above the Wspr slot. Of course you actually listen to the audio when starting Wspr.
Just this morning I heard a JT65 signal inside the Wspr passband, starting up WSJT I monitored the JT65.
It was a C91 station sending a CQ, also on the WSJT waterfall was my old data signals.
Looking at the screen capture it looks like a narrow FSK signal from one station to another, one strong (S9) and the other weaker signal in return, then stops.
The signals have been on the same frequency never changing, possibly a comms link, for what purpose I haven't got a clue.
Have you heard them?
Does anyone know what it is for please post a reply.
Convert a 10M 1/2 wave vertical to 6M for WSPR UPDATED with real half wave.
Submitted by VK6ZRY on Sat, 2011/12/31 - 09:55A proper 1/2 wave antenna.
http://tinyurl.com/6M-half-wav
The old Quickfix
The silly season is upon us downunder, 6M (Magic band) madness has proven to be same as every year after the Summer Solstice.
Sporadic E forms and the various forums and chats all get excited, luckily the vklogger forum has added the WSPR mode to its posting board.
Now we can post a WSPR mode contact along with SSB and CW etc.
I made a 1/2 wave vertical for 6M recently, it took 10 minutes to assemble and test with 1.1 SWR first time.
But it was rather heavy being constructed from 3/4 inch copper pipe (leftover from Magloop making).
About 2.940 Metres tall it was bending its mount in the wind.
So, some Googling and I found a solution, just slightly modify a 10M 1/2 wave base antenna.
Having such a monster, converted from 11M CB to 10M ham, it was ideal.
By just shorting out most of the large aluminium coils it tuned to 6M, my local beacon on 50.066MHz increased from S1 up to S7.
The SWR was 1.1, woohoo!
Wspering on 10M using that antenna has spotted the world, it is now on 6M with a small wire link
I did a bothways with VK2XN Wayne on the east coast 3,246KM.
Just spotted Leigh VK2KRR at 2,901Km too.
Keep it simple - I am basically lazy HiHi
Happy New Year to all
A simple Magloop one of many thousand out there
Submitted by VK6ZRY on Sat, 2011/11/12 - 17:06http://goo.gl/BIQNE a drawing
http://goo.gl/KA5BA a photo
http://goo.gl/Mmh1P a 20M TX @ 5 Watts Spot database from Magloop in above photo
My first loop was made from RG-213 coaxial cable, even the tuning capacitor was a length of coax, adjusted by sliding the braid.
It worked just fine on one band for WSPR.
As I live in a high density suburb I try to keep a low profile, so an obvious antenna is a big no no.
Experimenting with various materials to make caps has been quite fun, but as I use 5 Watts the dielectric materials only have to withstand under 1000 Volts.
PET from soda bottles is good to 20KV and I sourced TEFLON sheet (Hot BBQ plate liner) from cheap variety shops, made in China.
It is thinner than paper but glass fibre sheet impregnated with TEFLON is magic and about $5 for a 400mm x 500mm sheet.
Thin brass sheet from model shops as a sandwich with the TEFLON makes wonderful caps.
But now I just use coax. inner sliding in one end of a tube, as 5 Watts doesn't generate a high voltage.
Wish I could make a portable Magloop for travellers, there seem to be quite a few Hams who travel whether for work or pleasure.
Maybe just a RG58 coax loop would be the ideal answer, with a tube cap attached.
WSPR2 and VISTA
Submitted by VK6ZRY on Sat, 2009/11/21 - 11:53Don't forget like I did, make sure you give WSPR2 Admin. Rights.
Or it will load up with 30M and not the band you thought it was last on.
I love Vista, it protects my computer, but you always have to set Rights for all programs
you want to run.
Sorry for all the wrong spots today. ( a handful)
KISS version 2.0 NPN for PTT
Submitted by VK6ZRY on Sun, 2009/10/25 - 06:24as another Amateur has suggested use just one NPN transistor if you feel happy
with a connection between your rig and computer port.
http://wsprnet.org/drupal/node
Note: the higher value resistor between RTS and base of transistor.
Just depends what transistor you have from your junk box.
Simple WSPR Interface
Submitted by VK6ZRY on Tue, 2009/08/25 - 14:26I and many others believe in keeping an interface as simple as possible.
Makes things easy to repair, no RigBlasters here, or Signalinks.
