Transmitter Type T1154M, a restoration. /cont

Although it might appear that the T1154 (right) is much more complex than the T1083 (left); this is actually not the case. In fact, the two are very similar in that each transmitter requires a different coil-pack to be selected for both the Master Oscillator (MO) and PA output circuit per range. Where the T1154 differs from the T1083 is that this is now achieved by way of the band-select switch at the bottom left. The controls are conveniently colour coded too. In the case of the more popular ‘M’ variant ...Yellow for 200 - 500KHz (or KC/S), Red for 2.5 - 4.5MHz and Blue for 4.5 - 16.7MHz; the latter being in two ranges. The controls on the left are the Master Oscillator with the output tuning on the right. The switch in the centre is the Master Switch which controlled the entire T1154/R1155 combination including the two dynamotor DC generator sets.

T1154

T1083

Unlike the R1155 which was predominately an all aluminium construction, the T1154 was largely of steel ... Presumably since it was rather heavy, weighing in at 44 pounds. However, like the R1155, the T1154 was not designed to be maintained since the life of a bomber could be measured in weeks ... Typically three! To highlight this fact, see the two photographs below. This is the external RF

ammeter for the Fixed Antenna. This was mounted on the wall above the J-Switch, between the W/O and Navigator compartments. These little meters are quite rare and often fetch a high price on Ebay. I was very fortunate to get this example for the starting price! I was quite prepared for it to be faulty, so I was delighted when I discovered that it is still in working condition! What did take me by surprise though, was when I turned it over and found that it bore a significant amount of green paint ... The same colour as the inside of the bomber. It is therefore my belief that this little meter was fixed in place before the paint was dry! Such was the necessity to get the aircraft into service rapidly. Quite a poignant thought actually.