Very nice clean example of the popular Bush DAC range this being the early version in Walnut finish, as it is not in black this must be a slightly later production run and has the unusal gold finish behind the tuning dial plateI would place this around 1948.
The popular DAC 90 series started off with the 90 and was produced from 1946, though i cannot find a month when production started. As the A version was produced in 1950 these were soon upgraded and the reasons why are offered here. First of all the larger mains dropper was installed to the rear and perhaps this was to reduce in the Bakerlite case the heat given off by this, and therfore reducing stress. The valves installed at this time had lower heater operating voltages so clearly the mains dropper resistor to reduce the voltage down would have to be quite large in size, within a short period higher heater voltage valves were produced and helped to aid in the reduction of the size of this resistor and was installed in the new A series away from the rear cover. The tuning control is fitted on the right hand side and is fitted to the tuning capacitor via its long shaft through the MW and LW aerial so pending stray capacitance from your hand it is possible to notice a slight alignment movement of the signal as your hand moves away from this, though slight,perhaps on weak stations this might be more noticable. These first models have the speaker connected to its chassis, and later to aid in production costs the A series had this fitted seperately, again the speaker grill here cloth in this model was replaced with a punched out metal grill, (more cost effective). And just a matter of interest , the pilot lamp used for the display was fitted in the centre only, while the A series models had two one either side.
That aside of the historic development, how does this radio compare today. It was a hit then and these little radio's are still sought after today, it works very well indeed and as standard all de-coupling components replaced,all electrolitic capacitors, a number of cathode resistors were replaced. The mains dropper has been replaced with new old stock. All the valves were tested and only one was out of specification. The two I.F coils were replaced as the original Ferrite tuning cores had come loose, a lot of new wire around the HT side has also been renewed and then I.F and RF alignment undertaken, so its now good as it gets. Comes with its original 2 pin mains plug and 6 months guarantee.
The photos reveils the original speaker cloth, as this has only starting to show some sign of wear I felt it was part of its history and deserves to stay
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