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S57W Slovenia flag Slovenia

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QSL image for S57W

Tower #1 - left on the photograph (since 1990) ( lattice steel tower - side length 30 cm (12 inches))

CD-45 rotator, shock absorber, first thrust bearing: Yaesu GS-065 - above shock absorber, second thrust bearing (homebrew, heavy duty) mounted on the top, steel mast OD 2" - 8.5 meters ( 28 ft long).

- 20 - 3 el yagi (old design - W2PV), boom 5,89 m (19´ 4´´) - left tower @ 17,4 m (57 ft)

- 80 - inverted vee - on the top of the lattice tower @ 15 m (50 ft)

 

 

Tower #2 right on the photograph (since 1984) ( tubular tower)

- 160 - inverted L - (55 meters ---> 25 m vertical / 30 m horizontal)

- (wire on the top of the right tower = 15,5 m steel tubular tower (108 mm tube diameter on the top) + 50mm 5m Al tube + fibreglass mast 4,75 m) @ 24,8 m (82 ft) + 1 (one) elevated radial (January 29, 2012). I added second radial (January 26, 2013).

-80 - 1/4 wave vertical + 2 elevated radials (March 7, 2012)

- 40 - 2 element (wire) delta loop (feeding point is quarter-wavelenght down from the apex - vertically polarized) - hangs on rope between the towers@ 15 m (50 ft). Antenna is fixed to ---> 300 degrees. For receiving antenna on 40 I often use 80m vertical antenna, especially for directions PY, VK, ZL, JA with less noise.

Driver + director, spaced 6 m (20 ft). Driver is tuned on 7100 kc ,

director is tuned 2 % higher --> 7240kc

In "free space"you can cut director wire simply 2 % shorter.

In my case there is impact of surroundings (concrete garage is very closed to the bases of the both loops) so I tuned director on 2 % higher resonant frequency --> 7240 kc.

Driver impendance is transformed down with 4:1 transformer --> quarter-wavelenght 75 ohm coaxial cable.

299.8/ 7.1 = 42.225 m /4 = 10.556 m x 0.82 = 8.66 m long 75 ohm coaxial cable (I used CATV cable with foam dielectric. For velocity factor I took 0.82 - I didn´t check it with network analyzer.)

RX antena : 30 m long beverage (100 f) ---> 315 degrees (February 26, 2012)

 

 

Former call signs: YU3TAQ, YU3SB, YU3SB/2, YZ3AA, S53AA

October 1977: started in amateur radio coarse in 3. year of secondary school (17 years old ).

First licence - 1978 (C licence in ex YU) . I have worked on the club station YU3AIJ.

YU3TAQ -my first call sign ( B licence in ex YU) - march 1979.

YU3SB (A licence in ex YU) 1986 -

YZ3AA - June 26, 1991

S53AA June 26, 1991 - 1994

S57W since January 20, 1994 -

 

Equipment: ICOM IC-781, ALPHA 77D, TEN-TEC 715i RF Speech Processor, Heil HC-4 mic.

 

SW: Logger 32, N1MM

ADDRESS:

IGOR MERKUN

RIBNISKA ULICA 16

1000 LJUBLJANA

SLOVENIA

 

 

 

 

 

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217175 Last modified: 2014-03-04 14:54:29, 9262 bytes

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