U511; Ultra Electric Ltd.; (ID = 1546266) Radio U511; Ultra Electric Ltd.; (ID = 1546264) Radio
U511; Ultra Electric Ltd.; (ID = 1546263) Radio U511; Ultra Electric Ltd.; (ID = 1546265) Radio
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U511; Ultra Electric Ltd.; (ID = 1546266) Radio
Ultra Electric Ltd.;: U511 [Radio] ID = 1546266 750x500
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For model U511, Ultra Electric Ltd.; London
Country:  Great Britain (UK)
Manufacturer / Brand:  Ultra Electric Ltd.; London
alternative name
Ultra Radio and Television
Year: 1947 ? Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 5: 10C1 10F9 10LD11 10P14 10P14
Semiconductors (the count is only for transistors) Metal-rectifier
Main principle Superheterodyne (common); ZF/IF 471 kHz; 2 AF stage(s)
Tuned circuits 6 AM circuit(s)
Wave bands Broadcast, Long Wave and Short Wave.
Power type and voltage AC/DC-set / 200-250 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
Power out 6 W (unknown quality)
from Model: U511 - Ultra Electric Ltd.; London
Material Wooden case
Shape Tablemodel, slant panel.

Push Pull Beam Tetrode audio output.


  1. LW: 150 ... 300 kHz
  2. MW: 545 ... 1500 kHz
  3. SW: 6 ... 18.5 MHz

IF trap on aerial with variable capacitor.

Tone control.

Gram/PU sockets for crystal/ceramic and magnetic (using a transformer).

Requires external aerial.

Separate dropper taps for series heaters and HT according to mains voltage.

Price excludes tax of £5.75 in 1947

Mains Scale/Dial Lamp 15W (sewing machine type)

Warning: AC/DC type with potentially live chassis (either when on or off!), deliberately uses single pole mains switch in "Neutral" to chassis for minimal hum pickup on volume control. So isolation capacitors should be Y rated safety types, Earth to Chassis, Aerial, Magnetic and Crystal "P.U./gram" inputs.

Price in first year of sale 26.75 GBP
Literature/Schematics (1) Radio And Television Servicing books (R&TVS) (1951 Edition Vol I pg 530)

Model page created by Bartosz Szwed. See "Data change" for further contributors.

All listed radios etc. from Ultra Electric Ltd.; London
Here you find 220 models, 131 with images and 149 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.