• Country
• United States of America (USA)

• Manufacturer / Brand
• World Radio Laboratories (WRL), (Globe Electronics); Council Bluffs, IA

• Year
• 1959 ?

• Category
• Kit (Parts plus instruction) or building instructions only

• Radiomuseum.org ID
• 303908

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 4

• Valves / Tubes
• 6U8 6L6GB 6L6GB 5U4GB

• Main principle
• Audio-Amplification

• Power type and voltage
• Alternating Current supply (AC) / 115 Volt

• Power out
• 45 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: Universal Modulator WRL UM-1 - World Radio Laboratories WRL,

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Dimensions (WHD)
• 11 x 6 x 7 inch / 279 x 152 x 178 mm

• Notes

• 45W universal modulator (kit) for amplitude modulation transmitters (up to 100W plate input). Max power 45W in class AB2 service. Output impedance 500 to 20000 Ohms. Frequency response 800 to 3500 Hz +/- 1.5 dB. Accepts  carbon, crystal or high impedance dynamic microphones. Can be used as an audio amplifier for public address systems.

• Net weight (2.2 lb = 1 kg)
• 15.5 lb (15 lb 8 oz) / 7.037 kg

• Mentioned in
• - - Manufacturers Literature

• Literature/Schematics (1)
• -- Schematic

• Author
• Model page created by Götz Linss † 27.06.21. See "Data change" for further contributors.

• Other Models

• Here you find 30 models, 26 with images and 20 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from World Radio Laboratories (WRL), (Globe Electronics); Council Bluffs, IA