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Old 1st Dec 2017, 10:18 am   #12
Nuvistor
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Join Date: Aug 2013
Location: Wigan, Greater Manchester, UK.
Posts: 9,433
Default Re: Mazda 30F27 RF tetrode for TV tuners.

Quote:
Originally Posted by Synchrodyne View Post

The 10 to 15 dB range previously shown for the PC88, PC86-based UHF tuner probably means 10 dB at the bottom of Band IV and 15 dB at the top of Band V.
That would make sense, the Winter Hill transmitter used the high channels and required minimum 1mv to clear the noise, the Philips tuners faired a little better but still not good.
Being close to Winter Hill we could usually get 2-3mv with a decent 10 element aerial but we still had areas in shadow.
WH started transmission in 1965, transistor tuners came out soon after 1966, perhaps late 65 and the difference was enormous to those shadow areas.
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