swiss short wave radio station
HB9AWJ
qth :   Zurich               locator : JN47GH   operator : Jurg        ITU Zone : 28        CQ zone : 14
qth locator Italy (temporarily) : JN53HH   (IK5/HB9AWJ)

special intention and interests: low loss transmission regarding antenna coupler and feed line, calculating optimal feed line length and choosing the best coupler system
(see loss calculations for couplers and feed lines, different publications by DL3LH (on request directly from DL3LH: https://gutachten-emvu.jimdo.com/kontakt))



technical data / working conditions (Zurich) :

transmitting / antenna systems :

tx/rx : qro: FT-950, 100 W  ;   qrp:  SDR  ANAN-10E, 10 - 15 W

ant / coupler:   3.5 MHz / 5.3515 MHz / 7.1 MHz : NVIS-dipole 2 x 17m, height 3 to 8 meters, 600 Ω symmetric feed line, low loss symmetric Cs-Lp-network
                                                                                                                                                                                       (with no balun; according to DL3LH)

ant / coupler: 14.0 MHz / 18.1 MHz / 21.0 MHz / 28.0 MHz : end fed half-wave vertical, ʎ/4 - 450 Ω double line for impedance transformation (J-Pole),
                                                                                                                                                                                       feeding point 11 meters above ground



technical data / working conditions (Italy) :

tx/rx : qrp:  SDR  ANAN-10E, 10 - 15 W ; occasionally Hardrock 50 power amplifier, 50 W

ant / coupler:    (all band) 2 x 20 m dipol, height 10 m to 14 m above ground, 450 Ohm symmetric feed line, low loss symmetric Cs-Lp-network
                                                                                                                                                                    (with no balun, according to DL3LH)



qrv (Zurich) :
3.5 - 3.8 MHz: qrp   10 W   /  qro  100 W  input into symmetric Cs-Lp-coupler
5.3515 - 5.3665 MHz :  15 W   input into symmetric Cs-Lp-coupler, approximately 13 W EIRP
7.0 - 7.2 MHz: qrp  10 W   / qro  100 W   input into symmetric Cs-Lp-coupler

20m, 17m, 15m, 10m:  qrp 10 W  / qro 100 W  input into the quarter wave stub of the end fed half-wave antenna ;  currently not qrv

operating modes:      CW / SSB

qsl : actually not available ;  contact : hb9awj [at] kurzwellenstation.ch

example for
low loss transmission