2001 One Valve Competition
The rules were:
- Any one valve may be used, including more than one electron stream as long as they are in the one envelope.
- A separate semi-conductor detector diode (but not a second valve) may be used.
- The receiver must be submitted for judging with its own power source and headphones or speaker.
- It may be powered by battery or mains. If powered by mains power, the mains wiring should be such that it is inaccessable while the set is operating and the chassis must be earthed to the mains plug earth pin.
- If the receiver is considered unsafe by the judges it will be disqualified.
- The power supply may contain valves.
- The receiver may tune more than one band, but it will be judged on its performance on the broadcast band (550Khz to 1600Khz).
- A circuit diagram and explanation of the controls must be supplied.
- All receivers will be judged as follows:
- On air performance - 40 points
- Construction technique - 30 points
- Appearance - 30 points
- The "On Air Performance" will take into account the type of circuit and award points accordingly, ie: a TRF will be judged on its performance as such and not judged against a Regen or Superhet receiver (there is a challenge for the judges).
The Judges
The Winners
The Entries
Little Jim 2 (Battery Version) using a 1 valve design from Australian Radio and Hobbies January 1947
