QRP 1-30MHz Manual Days Antenna Tuner Kit
Contents:
- Schematic
- The Kit
- Specification
- Build Instructions
- References
- Videos
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Schematic
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The Kit
Specification
The QRP tuner can tune to the original non-resonant antenna by adding
the appropriate inductance or capacitance so that the radio can work properly.
Can be used as a band-pass filter, the emission can reduce
unnecessary radiation outside the band, the cross-modulation and
interference-band receiver can be reduced again.
Specification:
- Direct transfer power: less than 20W
- Tuning the Input power: Less then 3W
- Tuning indication is a LED display
- Interface: Q9 type (BNC)
- Network topology: T-type
- Antenna Interface: Q9 type (BNC)
- Operating frequency: 1-30MHz
- Match the antenna impedance range: about: 30 ~ 300Ω
- Carrying RF power: less than 15W
- Tuning required RF power: less than 3W
The kit includes:
- A waterproof sealed box - 1 off
- Stickers (used to determine the position of the transfer hole) - 1 off
- Q9 (BNC) Block (lug) - 2 off
- Ordinary wire segment - 1 roll
- Variable capacitor 2
- Small knobs - 2 off
- 0.25 countersunk head screws (for fixed variable capacitor) - 4 off
- 0.25 head screws - 2 off
- 0.3 gasket - 4 off
- 0.3 nut - 2 off
- Multi-knife switch (12 stalls) - 1 off
- A large knob - 1 off
- T106-2 the toroid (red) - 1 off
- 0.5 enameled wire - 1 roll
- A circuit board (standing wave indicator) - 1 off
- A stall switch - 1 off
- The red light emitting diode - 1 off
- 51 ohm 2W resistor - 3 off
- FT37-43 toroid (Black) - 1 off
- 1K resistor (light-emitting diode current limit) - 1 off
- 1N60 - 1 off
- 0.1uF capacitor - 1 off
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Build Instructions
Antenna Tuner Building Instructions.pdf
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References
http://m1kta-qrp.blogspot.com/2014/05/comments-on-chinese-atu.html
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Videos
These two videos are worth watching if you intend to contruct the kit.
The $20 eBay Antenna Tuner Kit Assembly and Review by
TinkerJohn, W5CYF Videos' published on Dec 29, 2013
Part 1. https://www.youtube.com/watch?v=jdFTwGv-CZY
Part 2. https://www.youtube.com/watch?v=hYeb-XN80FA
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Glenn Lyons VK4PK
glenn@LyonsComputer.com.au
Ver:gnl20190218 - pre published v0.9