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ON4CDJ Belgium flag Belgium

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Interested in all digital modes and QRP....

Favorite digimodes are Hellschreiber, Olivia, WSPR, QRSS, JT65A and JT9.

Busy improving my CW skills, and my goal is to be a good CW opr and to have fun with QRP.

Just started to make CW QSO's, so forgive my mistakes and slower speeds ;-)

Memberships: Feldhell Club #56 

                        Fists #16664 

                        SKCC #12230 

                        LIDS #54 

Rigs: Kenwood TS-570D(G), Yaesu FT-857 using 20 Watt or less in digimodes and 5 Watt in CW (or even less with the Rockmite)

For future /P outings, holidays etc. I have an Elecraft KX-1....finally my first Elecraft :o)

Have succesfully built a Rockmite40 with a 7030 kHz crystal, only have to make QSO's with it yet.


In JT9 mode always working with 5 Watt, never exceed !

Same for JT65A, but I'll crank up the power to 15-20 Watt when needed, so I never use more than 20 Watt.

For QRSS I have set up a grabber that is occasional online: ON4CDJ's QRSS Grabber

The grabber is running on a Raspberry Pi 3 with a FiFi-SDR receiver, using the Lopora QRSS software by PA2OHH

SDR with Raspberry Pi 2 for QRSS and WSPR RX.

When the grabber is not running, the SDR is receiving WSPR using WSJT-X 1.8.0 on Raspbian Stretch.

Sometimes using a RTL-SDR v3 dongle as well to monitor some WSPR on HF.


I have built (summer 2017) a QRP-Labs Ultimate3S QRSS/WSPR kit with a 5 band LPF board and GPS calibrated.

The kit produces approx. 250 mW and is mostly on the air during weekends or other days when I'm at home and not doing other things on HF with the endfed antenna.


Below is an example how a 250 mW QRSS signal looks like on a grabber, here received in the UK on 40m.


HF antenna: HyEndFed 4-band wire hanging as a sloper, from 8m to 3m above ground.

VHF antenna: homemade SlimJim made of 300 Ohm ribbon cable hanging in the attic/loft.


72, 73

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8453182 Last modified: 2017-11-14 20:15:23, 3825 bytes

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