Burndept "Super Screened Portable"


 This very heavy leather-covered set was made in 1929 by Burndept Radio in Blackheath, London. There were a few variants of this set each having a different loudspeaker fret design. This example is unfortunately missing its battery cover, which I'll need to sort out. Incidentally the term "screened" in the set's name refers to the use of the latest type of valve, a screen grid or tetrode valve.


 The valves are poking out of the chassis so that they can be replaced more easily, although lining up the valve pins with their sockets is tricky. The valves as fitted are (from the left) an angled AC/PEN4 marked "10E155" which means it was a government surplus type fitted after WW2, a Mazda HL210, a triode without visible marking except "HL613" written inside on its glass seal, and a Mazda P240 audio output valve, also mounted at an angle. The angling of the valves saves an inch of space.



 The maker's nameplate (does the missing section mean that a mistake has been cut out or was the nameplate modified from an earlier model?) and below, the tuning dial. The wavechange switch is marked "Long" and "Short" for what we now understand as long and medium wavebands. You'll notice that a log scale accompanies the wavelengths and on the right a second scale for aerial tuning. Ganging the two tuning condensers was not easy in the days of TRF sets and I suppose having individual controls could enable a user to combat cross modulation from a strong local station by detuning.


 Below a Wireless World article about the Burndept Portable, a similar model and predating mine by a couple of months.

Click the page to see a 1929 review of portable receivers.

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