The Competition was judged at the SEQG March 2001 Meeting

View all the One Valve Radios

Any one valve (tube) may be used, including more then 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 disqulified. 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.

Judging - All receivers will be judged for: On air performance 40 points, Consruction technique 30 points, Appearance 30 points.

Note: 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)