This particular specimen came in with an RA17 for refurbishment. It had been bought as part of a ‘Silent Key’ sale. It came with a power supply and had a 1960s vintage transistor radio stuffed inside as an audio stage! The new owner hadn’t yet powered it up, which was probably wise since the PSU looked lethal and more than a few of the iconic tall tubular capacitors had leaked all over the under-chassis wiring. For some reason, the front plate supporting the Perspex blister had been painted light grey. The front panel-mounted trimmer capacitor (C57, part of the DF circuit) had been removed, the access hole

Chassis stripped and cleaned of all that hideous shellac varnish that appeared to have been daubed everywhere.

With the exception of C57, the DF circuitry was complete. All the valve heaters checked out good, but it remained to be seen just how ‘good’ the valves were. I am very grateful to two members of the Royal Signals/19-Set Yahoo group for providing the missing C57 and a replica serial number plate. I saw no reason why this receiver should not be brought back to life. And it is perhaps fitting that such a receiver be restored in time for the Bomber Command memorial opening. It is probably safe to say that around 8,000 of those who were lost in action were Wireless Operators.

Before and after shots of the bias tag-board. Note the three 10K resistors making up 30K and the two 1K resistors making up 2K. Since this board proves the various bias voltages around the receiver, it is not wise to use nearest preferred values.

Another R1155A resurrected …

enlarged and a quarter-inch jack socket fitted. The mixer-oscillator valve was not the usual VR99, but a 6K8G. The latter is described as a ‘sensible’ replacement for the VR99. The serial number plate was also missing, and since this was not ‘inked’ onto the chassis as in later specimens, I have no idea what the serial number is. However the type 13 tuning drive complete with vernier dates it around early 1942 at the latest.