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This Antenna Tuner was designed with the popular Jackson Bros.
5250-1-365 single gang 365 pF variable capacitor.
Please make sure you can get one because one is no longer supplied with this kit.
A possible source is
www.midnightscience.com/catalog5.html#part2.
Other capacitance values such as 410pF or 518pF or wiring two smaller gangs in parallel
will make small changes to the calibration.
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Cambridge Kits
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Antenna
Tuner
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BOOST DX and reduce interference, IDEAL for HF150
etc or 10 W TX. 100kHz - 30 MHz in 6 overlapping ranges, BANDPASS design,
not just usual highpass. DETECTOR output, connect voltmeter for free WAVEMETER,
field strength meter etc. SO239 socket for receiver, single pole 3 mm for
antenna and ground, 2.5 mm for detector. HIGH Q coils and air dielectric capacitor, 4 x 7 x 14 cm, 350 g.
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"certainly improved reception ... signals easily peaked up",
Practical Wireless.
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"performance outstanding", PJO'N in New Zealand.
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"efficient and effective for DX reception ... small size", PB
in Notts.
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"effective with a short antenna at low frequencies ... gives excellent
results", Practical Wireless.
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The kit includes all parts
(except 365 pF variable capacitor, Jackson 5250-1-365
),
screws, wire etc, pre-wound coils,
and the detailed assembly and operating instructions
include a circuit diagram and description.
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