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Kjell SM2FOB (ex SM0FOB) QTH BODEN KP05vs SWEDEN - ITU18 WAZ14

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Amateur radio flea market in Haninge, Sweden

October 03, 2009

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    Amateur radio flea market in Haninge, Sweden
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1921 Spark gap transmitter

A reproduction of a 1921 spark gap transmitter built by Matt, KB8WFH.
Watch video here

On June 22, 2018 06:39 UTC SM2EKM (in KP05uw) was heard by JA6JWJ calling CQDX on 50.099 MHz. I live nearby (KP05vs) SM2EKM and in the video clip you can se the announcement on DX.Heat.com and hear him calling CQ. I could not hear any JA station.

My receiving antenna is a military surplus vertical antenna 30-60 MHz. Receiver is the Icom IC-7610 transceiver.

Received JA-stations with WSJT FT8 software. Interface IC-7610 loudspeaker >>> PC microphone.

Spectrum Analyzers

A spectrum analyzer should be part of every ham´s toolbox. That for easy checking what is going on inside a radio, transmitter performance, filter response, antenna matching, cable losses etc.. But the price tag puts of course a stop to this. Those who absolutely need such instrument and cannot afford a new instrument have to find a cheap old used one. But those working with very high frequencies are not cheap either.

PC USB connected black box analyzers are becoming lower in price and also stand alone very competent analyzers. The reduction in price is because of more and more advanced hardware and software

A recent example of a spectrum analyzer with astonishing relatively low price is the Siglent SSA3021X (9 kHz - 2.1 GHz). For example if equipped with tracking generator (software option) and a VSWR bridge for antenna measurements it cost less than a better transceiver. This analyzer has been tested in ARRL´s lab (QST Nov 2016) with good results. Before the test ARRL let Essco Cal…

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