[EdHolland]

Hi Folks,

While trawling the net for other radio related stuff, I happened upon the BBC R&D department website. This has an archive of BBC white papers, covering all sorts of technical aspects of television and radio, and contains publications back to 1940.

While interesting in itself, I happened upon an item of direct Philco relevance, in which the FM section of the 48/482 AM/FM receiver was tested. 

The decade by decade archive starting point is available here:


https://www.bbc.co.uk/rd/search?Type=Publications


And the Philco specific paper is here:

https://www.bbc.co.uk/rd/publications/rdreport_1949_11

I hope this is of interest to the Phorum.

Cheers

Ed

[Ron Ramirez]

Interesting. Thanks for sharing, Ed.

No surprise to me about the 48-482's discriminator being found as inferior. Philco was trying to circumvent Armstrong's FM patents to avoid paying royalties.

I am rather surprised, though, that the American 48-482 would be available in Britain at all, and that the BBC would test it.

[EdHolland]

Ron,

I doubt that set was available in Britain. According to Wikipedia (I'll do some more research on this) FM broadcasting was not introduced in the UK until 1955. However, the BBC would have been conducting tests, and would have wanted to evaluate how their signals would be received on consumer grade radio sets. In browsing the archives, I have found several receiver reviews including domestic and professional communications equipment.

I think I'll be downloading a selection of these for vacation reading. (Where's that nerd emoticon )

Cheers

Ed