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ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND WWW.OEVSV.AT

ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

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Page 1: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND WWW.OEVSV.AT

Page 2: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

© ÖVSV

ÖVSV ÖSTERREICHSICHER VERSUCHSSENDEVERBAND WWW.OEVSV.AT

2

PRINCIPLEEnd-fed High-Z Dipole

Page 3: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

© ÖVSV 3

Classicdipoleantenna

Page 4: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

© ÖVSV 4

Classicdipoleantenna

Page 5: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

© ÖVSV 5

Classicdipoleantenna

Needs long coaxial cable, feedpoint quite heavy ….

Page 6: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

© ÖVSV 6

Windomantenna

Page 7: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

© ÖVSV 7

Endfedhigh-zantenna

Page 8: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

© ÖVSV 8

Endfedhigh-zantenna

Page 9: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

© ÖVSV 9

Endfedhigh-zantenna

Page 10: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

© ÖVSV 10

Endfedhigh-zantenna

Someone built this:

Page 11: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

© ÖVSV 11

Endfedhigh-zantenna

Here is our luxury YOTA version:

Page 12: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

© ÖVSV 12

Endfedhigh-zantenna

The first twowindings

Page 13: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

© ÖVSV 13

Endfedhigh-zantenna

Solder theprimary coilto the PL-socket

Page 14: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

© ÖVSV 14

Endfedhigh-zantenna

Capacitor installed.

Cable ties hold thetoroid in place.

Page 15: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

© ÖVSV 15

Endfedhigh-zantenna

Antenna wireconnected.

Secured withcable tie.

Page 16: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

© ÖVSV 16

Endfedhigh-zantenna

Testing theantenna withan analyzer.

Page 17: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

© ÖVSV 17

Endfedhigh-zantenna

Testing theantenna withan analyzer.

Page 18: ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND · ant. 1 : 64 transformer for end fed antennas 3.5 -30 MHz trx 2 X 7 turns Inun cul on FT240-43 2 turns to ground 100pF 1000V REGION

ÖVSV ÖSTERREICHSICHER VERSUCHSSENDERVERBAND WWW.OEVSV.AT

READY!Please us it with Raspberry PiWSPR beacon