UDISCO L6 circa 1927 - January 2023 - Silicon Chip Online
There was a least one Australian company that developed the battery-powered triode valve TRF wireless receiver of the early 1920s to its limit: UDISCO, the United Distributing Company. When advertising, UDISCO would often draw attention to the single dial control they used. by Dennis Jackson
Source: siliconchip.com.au