marconi: T24 DAB; Marconiphone - Questions

I received some pictures of the Marconiphone T24DAB and wanted to upload - but we display two different T24DAB here. One claims Medium and Short waves the other Medium (187-565 m) and Long (1000-2000 m). I believe that the ordinary Marconiphone T24DAB has Medium and Long waves. Is there also one with Medium and Short waves?

In an other place (not RMorg) I see a X18 instead of X17 as first valve - but our schematics show a X17 which is a DK91 or 1R5. X18 is a DK92 or 1AC6.

The Marconiphone T24DAB has been released in October 1950 for a price of £ 13 8s 6d excluding batteries and purchase tax (Source: "The Portable Collection"). Battery Ever Ready B126 (90v HT) & 5 x U2 (7.5v LT). or Mains power AC/DC 195-255V.

The source "Vintageradio.me.uk:
Mains (Metal rectifier)/Battery. Note. Valve line up in my set is listed as:N18 ZD17 W17 X17 or (US) 3Q4 1S5 1T4 1R5 365Khz = IF.

A similar Radio, the Vidor CN426 is from 1954 but not this one. I'm quite sure that the T24DAB has been announced in 1950 and possibly also sold in that year. A Marconiphone advert from February 1951 was quite an early advert for a "Summer" product, The Marconiphone advert from September 1950 shows a range of products from the 1950 catalogue - on top the picture of the T24DAB. I will change the year on both models (ex 1945 ? and 1954).

The only question stays:
Are there two different models with the same case?
But I also would like to know until when this set was sold.

Change 12.8.: Flag for English

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Dear Ernst,

The only UK data that I have indicates that is was available until at least 1953.

There was an earlier model because there is reference to the earlier IF being 360 kHz rather than 365 kHz.

The valve line-up is given as X17 W17 ZD17 N18 + Metal rectifier.   2 Wavebands Medium + Long.

Power AC/DC mains and 90V + 4x1.5V.

Best regards,

Roy

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Dear Ernst,

The Schematic uploaded came from a Service Electrical Trading Chart of June 1954.

There is written "date released: October 1950". It may seems that it was sold from 1950 to 1954. But 1954 is only a guess, based on that Chart date . 

Also reading that schematic, the wave bands are Broadcast and Long wave. For any reason, Short wave might be a deplorable transcription error.

Best Regards

Mário

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