2000 CRYSTAL SET COMPETITION
Judged 19 March 2000 at Maleny
The Winners - Best Performance Crystal Set
First prize went to Brian Reid's Super Delux set
The Winners - Best Reproduction Crystal Set
Second prize went to Brian Reid's Super Delux set
The Winners - Most Unusual Crystal Set
I had acquired two 30cm diameter circles of blue plastic (the off-cuts from a Mobile Service Station sign) and thought they could form the basis for a crystal set that looked like a pot of colorful flowers?
Believing that the larger the coils the better the Q would be I decided to use the two 30cm diameter.
Coils in a band-pass circuit, the amount of coupling between the two coils being adjusted by altering the distance between the two and the antenna being connected to a separate coil wound below the first tuned circuit.
L1 has 20 turns of colourful hook-up wire with antenna coupling coil of 3 turns of wire tapped each turn on the inside of L1. L2 has 20 turns of different colour hook-up wire with detector tap at 15 turns.
The two-gang tuning capacitor had trimmers attached, which were adjusted for tracking at the HF end of the band.
The finished Crystal Set did not look much like a pot of flowers but definitely unusual!!