Wireless Set No. 1 Overview and Technical Details

The Wireless Set No. 1 was a revolutionary communication device that played a crucial role in World War II. It was a compact, portable radio transmitter and receiver that allowed soldiers to communicate with their units over short distances.

Developed in 1940 by the British Army, the Wireless Set No. 1 was designed to be lightweight and easy to use, weighing in at just 22 pounds. Its small size made it ideal for use on the battlefield.

The set used a range of frequencies, including 16, 20, 28, and 32 MHz, to transmit and receive messages. This allowed for more flexibility and reliability in communication.

The Wireless Set No. 1 was powered by a rechargeable accumulator, which provided up to 12 hours of continuous operation. This was a significant improvement over earlier communication devices that required frequent battery replacements.

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The Wireless Set No. 1 has a receiver circuit that's a single conversion superheterodyne format. This means the signal is converted down to 465 kc/s and then demodulated and applied to the audio stage.

The valve line-up for the receiver is a crucial part of its functionality. It consists of valves V1A, V2A, V1B, V1C, V3A, and V2B, each with a specific role in the circuit.

Here's a breakdown of the valve line-up:

The tuned output from the RF stage is then passed to the mixer or frequency changer, which uses part of V2A to change the signal down to the intermediate frequency.

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The WS 19 receiver circuit is a fascinating piece of technology. It's based on a single conversion superheterodyne format, which converts the signal down to 465 kc/s.

The receiver uses a valve lineup that includes a 6K7G variable mu pentode, which serves as the RF signal amplifier. This valve is crucial for amplifying the weak signal from the antenna.

The local oscillator signal is generated by the triode section of V2A, a 6K7G valve. This signal is then mixed with the incoming signal to produce the intermediate frequency.

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The IF transformer is tuned to 465 kc/s, which is the frequency of the intermediate signal. This provides the required selectivity for the receiver.

The valve lineup for the WS 19 B set receiver is quite different, featuring an RF amplifier, a super-regenerative detector, and two stages of audio amplification.

Here's a comparison of the valve lineups for the two receivers:

The WS 19 B set receiver uses a super-regenerative detector, which provides high gain and signal demodulation. This type of detector is ideal for VHF channels.

The B set receiver also features two stages of audio amplification, provided by V1E and V8A. These valves work together to amplify the audio signal to a level that's suitable for listening.

The WS 19 set was a hugely successful piece of kit, providing good reliable service to the British armed forces during WW2. Its rugged appearance and iconic design make it a true vintage radio.

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The Sterling Spark Transmitter is a crucial component in the communication system. It's responsible for transmitting the signal to the receiving device.

The transmitter uses a high-frequency oscillator to generate the signal, which is then amplified by a power amplifier. This setup allows for a strong and clear signal to be sent.

The Sterling Spark Transmitter operates on a frequency of 10 kHz, which is within the range of human hearing. This frequency is chosen to minimize interference from other devices.

The transmitter's design ensures that the signal is transmitted efficiently, with minimal loss of power. This is achieved through the use of a tuned circuit, which helps to filter out unwanted frequencies.

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The WS 19B Set was a variant of the Wireless Set No. 1, designed for use in light tanks. It was one of three variations of the complete station, with the others being the Set 1A for ground use and the Set 1B for use in vehicles.

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The WS 19B Set was part of the Wireless Set No. 1 production history, which spanned from 1933 to 1938. This period saw the introduction of new variants and improvements to the original design.

Here are the specifications for the Wireless Set No. 1, which also apply to the WS 19B Set:

The WS 19B Set operated within a frequency range of 4.2-6.66 MHz, with a power output of 0.5 watts. This allowed for communication over a range of up to 5 miles.