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Synchrodyne · 21st May 2019, 1:53 am

I mentioned in post #16 that British hi-fi makers had FM tuners either in production or in protype form as early as 1952-53.

But even before that, towards the end of 1949 HMV had released a quite ambitious single-box FM receiver, namely the 1250. This had a 10-watt push-pull output and a 13.5-inch elliptical speaker. As a thought experiment, it would be interesting to compare a restored example of this model with say the Hacker Mayflower on suitable programme material. The RF chassis of the HMV 1250, modified for crystal control of the oscillator, was used as the basis for the BBC HR4 outside broadcast radio microphone receiver, so it was in the broadcast chain. At about the same time, Kolster Brandes also released an FM receiver, along with an adaptor (the RF section alone of that receiver) for use with existing AM receivers. By the time FM broadcasting started in the UK, the cost-conscious era had arrived and for example, the HMV 1251 AM-FM receiver looks to have been very ordinary when compared with the 1250.

Cheers,

21st May 2019, 1:53 am	#18
Synchrodyne Nonode Join Date: Jan 2009 Location: Papamoa Beach, Bay of Plenty, New Zealand Posts: 2,944	Re: Do you ever gain the impression... I mentioned in post #16 that British hi-fi makers had FM tuners either in production or in protype form as early as 1952-53. But even before that, towards the end of 1949 HMV had released a quite ambitious single-box FM receiver, namely the 1250. This had a 10-watt push-pull output and a 13.5-inch elliptical speaker. As a thought experiment, it would be interesting to compare a restored example of this model with say the Hacker Mayflower on suitable programme material. The RF chassis of the HMV 1250, modified for crystal control of the oscillator, was used as the basis for the BBC HR4 outside broadcast radio microphone receiver, so it was in the broadcast chain. At about the same time, Kolster Brandes also released an FM receiver, along with an adaptor (the RF section alone of that receiver) for use with existing AM receivers. By the time FM broadcasting started in the UK, the cost-conscious era had arrived and for example, the HMV 1251 AM-FM receiver looks to have been very ordinary when compared with the 1250. Cheers,