hismasters: HMV1121: A copy?

The tube line up is an unusual mixture (for 1950 UK) of B7G, Octal and 1930 4 pin. Perhaps an RCA influence as "mains" B7G tubes mixed with other tubes is quite common on US sets of the era.

But this while this 1950 Radio "slatted" scales in the UK is unique to this family of models, it is on quite a few Telefunken Radio sets.

• 1938 Spitzen Super 898WK
• 1938 Spitzen-Super 898WKZ (T898WKZ)
• 1939 Spitzen-Super D860WK
• 1939 639U (T639U)
• 1950 Spitzen-Super T5000

The Telefunken sets (at least one) illuminate only the scale for the selected band. The HMV1121 does have four scale lamps, but they are two each side and all on together. (Source: Wolfram Zylka)

I think I read once that Telefunken was one of the first Europeans to Licence RCA's Superhet Patent?

However the mix of tubes (apart from the rectifier) allows a good RF/IF set of stages (recent B7G mains tubes in 1950) and "loud" Audio Amplifier using the Octal KT61. Beware substituting other pin compatible Octal Audio tubes without consideration of bias (Cathode Resistor).

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