Coronation Twin R786
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alternative name
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Ultra Radio and Television | ||||
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| Year: 1953 | Category: Broadcast Receiver - or past WW2 Tuner | ||||
| Valves / Tubes | 4: 1C2 1F3 1FD9 1P11 |
| Main principle | Superheterodyne (common); ZF/IF 471 kHz |
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| Wave bands | Broadcast (MW) and Long Wave. |
| Details | |
| Power type and voltage | Line / Batteries (any type) / 200-250/85+7,5 Volt |
| Loudspeaker | Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm |
| Power out | |
| from Radiomuseum.org | Model: Coronation Twin R786 - Ultra Electric Ltd.; London |
| Material | Bakelite case |
| Shape | Portable set > 8 inch (also usable without mains) |
| Dimensions (WHD) | 12 x 8.5 x 6.5 inch / 305 x 216 x 165 mm |
| Notes | Released April 1953 price £13 10s 4d plus purchase tax. AC/DC mains or battery. |
| Source of data | Radio! Radio! |
| Mentioned in | -- Original-techn. papers. |
| Literature/Schematics (1) | Trader Service Sheet (suppl. of Wireless & El. Trader, etc.) (1100) |
Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.
All listed radios etc. from Ultra Electric Ltd.; London
Here you find 218 models, 128 with images and 149 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
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Hits: 2228 Replies: 5
ultra: Ultra R786 Mains Lead
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Jamie Skinner
23.Dec.11 |
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Hi everyone, Does anyone know where I can find a suitable mains lead or find a connector that will fit the Ultra R786. I have obtained this set and it is missing. I have been told the Bush DAC90A Plug might be the same? The measurement bewteen pin centres on the DAC90A being 17mm. (0.67inches) |
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Howard Craven
23.Dec.11 |
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Hello Jamie, The Bush DAC90A plug is nothing like the plug that fits the Ultra Twin. The plug for the Ultra is unique and is very difficult to find on its own. I can post a pic of the two plugs together if you like. Regards ........... Howard Surrey Hills, England
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Jamie Skinner
23.Dec.11 |
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Thanks Howard, this would be very helpful as I might want to replicate one. Failing that I would have to fit a permenant mains lead, or a 'Figure 8' connector.
Cheers, Jamie. |
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Howard Craven
23.Dec.11 |
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Hello Jamie, Here are the Bush and Ultra plugs. Note that there is a step on the Ultra plug which operates the battery cut-off switch when pushed into its socket. Regards ........... Howard Surrey Hills, England
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Michael Watterson
23.Dec.11 |
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Actually it's quite simple to make a custom socket (the plug is on the Radio and it's technically a cable socket on the flex). It would be a shame to spoil the radio set. Perhaps I should do step by step guide. |
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Jamie Skinner
23.Dec.11 |
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Thanks Mike, It would be very useful for a step by step guide to be written up. However, this set has a lot of damage to the bakelite and will require a lot of filler etc, so for this specific set anyway fitting a standard 'Figure Of Eight' socket wouldn't de-value it. It would still be interesting to attempt to replicate a plug. I have placed adverts in various places so I might get a plug yet.
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End of forum contributions about this model
