Clix Television Turret Tuner

VHF TV Turret Tuner

Six Advantages of the Clix Television Turret Tuner

1. Accurate switching. The rotating drum of the Ediswan Clix Television Turret Tuner indexes accurately to any of twelve positions and re-sets precisely in these positions after switching. No question of mistuning after switching.
2. All circuits are adjustable with the unit in position in a Television receiver. Adjustable cores to all inductances are easily accessible with the tuner in position in a Television receiver. The tuner can, therefore, be set up or re-adjusted in its actual operating position.\
3.  Additional tuned circuits may be added at any time without removing the Tuner from the receiver.  The Ediswan Clix tuner is designed so that additional coil segments can be added at any time while the tuner is in position in a receiver. To tune to another channel the serviceman merely clips into position additional coil segments, carrying correctly wound coils, and trims them by the adjustable cores provided. There is no need to dismantle the tuner or return it to the Factory for any part of this operation.
4. Wiring is reduced to an absolute minimum thereby eliminating stray capacities. Stray capacities between wiring can lead to serious mistuning on the very high frequencies of Television Band 3. The Ediswan Clix Tuner is designed so that wiring is reduced to an absolute minimum and materials are specially selected to overcome the problems of drift and instability encountered on these frequencies.
5.  Easily accessible for servicing. The section and `U' section which form the Ediswan Clix tuner are easily parted without removing the drum. This gives easy access to the wiring on the `I,' plate for servicing purposes.
6. Suitable for mounting in deep or shallow chassis. Four 4BA tapped holes are provided for mounting the Ediswan Clix Turret Tuner. If required, suitable mounting brackets can be provided for use in shallow chassis.

In 1953 and 1954, the UK used a 405-line television system operating on VHF Band I and Band III.

The channel frequencies were as follows:

Band I Channels

• Channel 1: Vision 45.00 MHz, Sound 41.50 MHz
• Channel 2: Vision 51.75 MHz, Sound 48.25 MHz
• Channel 3: Vision 56.75 MHz, Sound 53.25 MHz
• Channel 4: Vision 61.75 MHz, Sound 58.25 MHz
• Channel 5: Vision 66.75 MHz, Sound 63.25 MHz

Band III Channels

• Channel 6: Vision 179.75 MHz, Sound 176.25 MHz
• Channel 7: Vision 184.75 MHz, Sound 181.25 MHz
• Channel 8: Vision 189.75 MHz, Sound 186.25 MHz
• Channel 9: Vision 194.75 MHz, Sound 191.25 MHz
• Channel 10: Vision 199.75 MHz, Sound 196.25 MHz
• Channel 11: Vision 204.75 MHz, Sound 201.25 MHz
• Channel 12: Vision 209.75 MHz, Sound 206.25 MHz
• Channel 13: Vision 214.75 MHz, Sound 211.25 MHz

It's worth noting that in 1953, there were only five main television transmitters in the United Kingdom, with three temporary transmitters added for the Coronation broadcast. The Independent Television (ITV) service, which began in 1955, was allocated channels in Band III (174-216 MHz)

Manufactured by Edison Swan Electric Co. Ltd.

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