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FERNSEH · 26th Aug 2017, 10:50 pm

From the pages of the 1955/56 Radio and Television servicing book, 371 to 374.
A survey of the various adaptors available to facilitate the reception of Band III transmissions. For the TRF models such as the BT2147 and BT5144 a special Band III adaptor was made. The Band III signals are converted to the BBC frequency and Band I BBC signals pass though the new tuner without the intervention of the local oscillator.
Converted superhet receivers use a three position Band I/III tuner which is similar to the one fitted in the BT1746 series.

DFWB.

26th Aug 2017, 10:50 pm	#39
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: And the next one! a GEC BT2147 From the pages of the 1955/56 Radio and Television servicing book, 371 to 374. A survey of the various adaptors available to facilitate the reception of Band III transmissions. For the TRF models such as the BT2147 and BT5144 a special Band III adaptor was made. The Band III signals are converted to the BBC frequency and Band I BBC signals pass though the new tuner without the intervention of the local oscillator. Converted superhet receivers use a three position Band I/III tuner which is similar to the one fitted in the BT1746 series. DFWB. Attached Thumbnails Last edited by FERNSEH; 26th Aug 2017 at 11:16 pm.