The British Wireless Set No. 38 was a portable radio transmitting and receiving unit used by the British Army during World War II. It was used primarily by the infantry for communications, both in field conditions and for military operations. This set was an important means of communication for soldiers on the battlefield.

Key features of the Wireless Set No. 38:

1. Use: It was used for both sending and receiving messages. The set operated on short waves (shortwave), which gave the ability to communicate over longer distances.
   
   Dimensions: The set was relatively compact and designed for portability. It was mounted in a wooden case with a handle for easy transport.
   
   Range: Range varied depending on conditions and transmitting power, but it was usually effective for a range of several tens of kilometers.

2. Power: The set was powered by batteries, which made it practical for use in remote locations without access to electricity.
   
   Bandwidth: The device operated on different frequencies within the shortwave range, which increased flexibility in communication.
   
   Users: It was intended for use by soldiers, with an instruction card that helped them operate the device, set frequencies and send/receive messages.

Instruction Card:
The instruction card accompanying the Wireless Set No. 38 was of great importance to users, especially soldiers who had little experience with such technology. The instruction card provided information on:

Setting the frequencies for transmitting and receiving.

How to position the antenna correctly for best range.

Operating the set and troubleshooting common technical problems.

• Using the battery and charging it.

  Maintaining and cleaning the set.

  The instruction cards for the Wireless Set No. 38 are often sought-after collectibles today, especially for military collectors and museums focusing on World War II. They are often priced because of their historical value and the rarity of well-preserved copies.

  If you are interested in obtaining an original copy or reproductions of such an instruction card, there may be several specialized marketplaces or auctions that offer them.