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HamRadio Station – DO7PSL – Stephan Lange HamRadio Station – DO7PSL – Stephan Lange
  • Home
    • Shop
  • Blog
    • Antenna Blog
    • SOTA Blog
    • F.A.Q. – FORUM
    • Downloads
  • DX-Propagations
    • DX MORE Info
    • Frequencies – short view
  • QRP
  • SOTA
    • SOTA – Activation steps
    • SOTA watch ALERTS
    • SOTA watch SPOTS
    • SOTA and QRP activities
    • SOTA Rules for the activators
    • SOTA F.A.Q.
  • Equipment
    • Antenna-Projects
    • QRP Projects
    • Other Projects
    • Digi Modes – PSK31
  • Weather-Satellite
    • Weather Station – update currently
    • SAT – update currently
    • TOP10 Satelliten Bilder
    • Sat-Bilder interpretieren
    • NOAA-online
    • Unwetterwarnung Deutschland
  • Satellite
  • About
    • Impressum/imprint
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Blog

HamRadio Station - DO7PSL - Stephan Lange / Antenna / Antenna Tuner QRP
Jul 18

Antenna Tuner QRP

  • 18. Juli 2015
  • 1 Comment
  • Antenna, Bauanleitung, QRP, SOTA

For my SOTA activities i build a small Antenna-Tuner with PI-network.

I opted for a T-80 2 Ameridon and 0.5 mm2 copper wire. 2x variable capacitators 140pF + 60pF – switchable fixed capacitator 150 pF Antenna and transceiver side.

The coil has 11 taps. Inductors: 1.14 uH, 1.54 uH 3.54 uH, 6.45 uH …

SWRI have my device even donated a LED indicator. The LED lights more brightly, will leave the more power in the wire.

It is 2 germanium diodes, a 10pF capacitor and a LED. All this fitted in an aluminum housing.

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ATU-QRP

ATU-QRP1

ATU-QRP-V2

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About The Author

born 1969 - licence since 2009 - germany ham radio what i like? SOTA, QRP, building antennas and accessories, Baluns and so on. my shortwave-bands are: 10m, 15m and sometimes 80m I am fully in job - so ham radio is a good hobby to balance ;-)

Related Posts

  • Antenna Tuner – 100 Watt – L-Network – balanced/unbalanced – SWRbridge22. Januar 2019
  • Antenna Tuner / T-Network30. Juni 2016
  • SOTA Equipment18. Juli 2015

1 Comment

  1. Jens
    27. September 2020 at 9:24 · Antworten

    Moin,

    Die 2 Schalter mit den C sind bisschen sinnfrei. Entweder ist der Kondensator am einen Ende offen oder Kurzgeschlosen. Oder muss das so sein, und wenn ja, wo ist der Sinn?

    73

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