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The CT-400 works on the magnetic coupling principle and covers the HF bands with wire antennas of virtually any length. Matches 50 Ohm coax (10 - 30m) to input of HF receiver. Instructions included showing recommended method of mounting. May require additonal box and sealing compound for outside use.
The end of the antenna wire enters through a hole in the base of the box protected by a grommet and the coaxial cable also enters the base of the box but via a waterproof gland. The whole assembly is hung, by two sturdy hooks, to either the antenna wire or to its supporting halyard.
This Novice-Crystal Set is a simple receiver designed as a practical project. Based on the early days of wireless, todays crystal set uses exactly the same circuit but the components are now made differently - the cats whisker is now a Germanium Point-Contact diode, and the headphones are now a crystal earpiece. For best reception a good aerial and earth are required.
The Novice AF amplifier is a simple practical project complementing the Radio Amateurs’ Novice Licence. The audio amplifier can be used with any other project such as the Novice Receiver.
The Novice-MW is a simple receiver designed as a practical project complementing the Radio Amateurs’ Novice Licence. All components included to make this kit, also includes a crystal earpiece. The finished kit can be mounted in any plastic or metal case. Requires 9V PP3 battery (not included).
The Novice-SW is a simple receiver designed as a practical project complementing the Radio Amateurs’ Novice Licence. All components included to make this kit, also includes a crystal earpiece. The finished kit can be mounted in any plastic or metal case. Requires 9V PP3 battery (not included).
The NRF is a passive audio filter intended for enhancing the selectivity of a receiver by limiting, i.e. sharpening the audio response at the headphone (or loudspeaker) stage. It has a 6dB bandwidth of about 2200Hz and proves very effective in reducing noise. Designed for 8 Ohms, it can be used with almost any value.
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