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Adverts from 1949
    
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Brand Advert.
•Radio Valve Data, Wireless World
•January, 1949.
Special Purpose Valves Advert.
•Radio Valve Data, Wireless World
•January, 1949.
Radio Valve Manual Advert.
•Radio Valve Data
•January, 1949.
Brand Advert.
•Radio Valve Data
•January, 1949.
EF42 as Wideband Oscilloscope Y Amplifier Stage.
•Wireless World
•January, 1949.
PL33 & EY51 RF EHT Supply.
•Wireless World
•February, 1949.
EC91 Grounded Grid Amplifier.
•Wireless World
•March, 1949.
EF42 in the Input Stage of an Oscilloscope.
•Wireless World
•April, 1949.
6F13 Advert.
•Wireless World
•May, 1949.
Z77 Advert.
•Wireless World
•May, 1949.
1267 Advert.
•Wireless World
•May, 1949.
EF37, ECC83 & EL37 Advert.
•Wireless World
•May, 1949.
EL38 & EY51 EHT from Line Timebase.
•Wireless World
•June, 1949.
DL93 as VHF Power Amplifier.
•Wireless World
•July, 1949.
EF42 Linear Oscilloscope Timebase Advert.
•Wireless World
•August, 1949.
B65 Advert.
•Wireless World
•August, 1949.
EF91 in HF Receiver Circuits Advert.
•Wireless World
•September, 1949.
EF42, ECC34 & EL38 TV Timebase No. 1 Advert.
•Wireless World
•October, 1949.
EF42, ECC34 & EL38 TV Timebase No. 2 Advert.
•Wireless World
•November, 1949.
Miniatures Advert.
•Wireless World
•December, 1949.
6F33 Advert.
•Wireless World
•December, 1949.
TV CRT's Advert.
•Wireless World
•December, 1949.
EF42 as synch separator Advert.
•Wireless World
•December, 1949.
1R5, 1S4, 1S5, 3S4, 1T4 & 3V4 Advert.
•Wireless World
•December, 1949.
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