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Marconi

Valve List

Brand Advert.
•Popular Wireless
•March 10, 1923.
R Type & DER Advert.
•Wireless World
•April 14, 1923.
R Type Advert.
•Wireless World
•April 28, 1923.
Brand Advert.
•Modern Wireless
•July, 1923.
Brand Advert.
•Modern Wireless
•August, 1923.
R Type & DER Advert.
•Wireless World
•August 8, 1923.
R Type & DER Advert.
•Modern Wireless
•September, 1923.
R Type & DER Advert.
•Radio Times
•October 5, 1923.
DER Advert.
•Modern Wireless
•November, 1923.
DE3 Advert.
•Modern Wireless
•December, 1923.
DER Advert.
•Wireless Weekly
•December 12, 1923.
R Type & DER Advert.
•Radio Valves and How to Use Them
•January, 1924.
Brand Advert.
•Modern Wireless
•January, 1924.
Brand Advert.
•Modern Wireless
•March, 1924.
DER Advert.
•Modern Wireless
•April, 1924.
R Type, DER & DE3 Advert.
•Modern Wireless
•May, 1924.
Brand Advert.
•Wireless Weekly
•May 14, 1924.
DE5 Advert.
•Wireless Weekly
•May 28, 1924.
DE4 & DE6 Advert.
•Wireless Weekly
•August 20, 1924.
Brand Advert.
•Wireless Weekly
•August 20, 1924.
Brand Advert.
•Wireless Weekly
•September 3, 1924.
KH1 Advert.
• 
•1927.
KL1 Advert.
•The Wireless World and Radio Review
•February 2, 1927.
KL1 Advert.
•Wireless World
•February 2, 1927.
DEP215 Advert.
•Wireless World
•March 23, 1927.
DEP215 Advert.
•Wireless World
•May 11, 1927.
KL1 Advert.
•Wireless World
•May 25, 1927.
DEH210, DEL210 & DEP215 Advert.
•Wireless World
•June 1, 1927.
HL210 Advert.
•The Wireless Constructor
•April, 1928.
S625 Advert.
•The Wireless Constructor
•May, 1928.
SG Valves S215, S410, S610 & S.8 Advert.
•Wireless World
•September 18, 1929.
SG Valves S215, S410, S610 & S.8 Advert.
•Popular Wireless
•September 21, 1929.
1928-9 Range Advert.
•The Wireless Constructor
•October, 1928.
Brand Advert.
•Popular Wireless
•November 9, 1929.
HL210 Advert.
•Wireless World
•November 28, 1928.
Brand Advert.
•Popular Wireless
•February 1, 1930.
AC Valves Advert.
•Popular Wireless
•January 17, 1931.
MS4 Advert.
•Wireless World
•May 6, 1931.
HL2 Advert.
•Wireless World
•May 6, 1931.
Brand Advert.
•Valve Data Booklet, Wireless World
•1932.
DC Mains Valves Advert.
•Wireless World
•January 20, 1932.
AC Mains Valves Advert.
•Wireless World
•February 3, 1932.
Screen Grid Valves Advert.
•Wireless World
•February 17, 1932.
H Series Valves Advert.
•Wireless World
•March 2, 1932.
DC Mains Valves Advert.
•Wireless World
•March 16, 1932.
HL2 Advert.
•Wireless World
•March 30, 1932.
PT2 & LP2 2 Volt Output Valves Advert.
•Wireless World
•April 13, 1932.
PX4 & DPT Mains Output Valves Advert.
•Wireless World
•April 27, 1932.
U10 & U12 Rectifiers Advert.
•Wireless World
•May 11, 1932.
Brand Advert.
•Wireless World
•August 19, 1932.
AC Range & MH4.
•Popular Wireless
•December 17, 1932.
DC Mains Valves Advert.
•Wireless World
•January 27, 1933.
Catkin Advert.
•Popular Wireless
•June 3, 1933.
Catkin Advert.
•Wireless World
•June 16, 1933.
Catkin Advert.
•Popular Wireless
•June 17, 1933.
Catkin Range Advert.
•Popular Wireless
•July 1, 1933.
VP21 & B21 Advert.
•Wireless World
•November 17, 1933.
VS24 & VP21 Advert.
•Wireless World
•December 8, 1933.
Battery Valves Advert.
•Wireless World
•September 14, 1934.
MH41 Advert.
•Wireless World
•September 28, 1934.
Universal Valves Advert.
•Wireless World
•October 26, 1934.
Big Noises Advert.
•Wireless World
•November 9, 1934.
MH41 & H30 Advert.
•Wireless World
•November 30, 1934.
Frequency Changers Advert.
•Wireless World
•December 7, 1934.
Christmas Brand Advert.
•Wireless World
•December 21, 1934.
VS24 & VMS4B Advert.
•Wireless World
•March 8, 1935.
'Stabilovolt' Voltage Stabiliser Advert.
•Wireless World
•September 4, 1936.
'Stabilovolt' Voltage Stabiliser Advert.
•Wireless World
•October 9, 1936.
Television CRT Advert.
•Television and Short-Wave World
•September, 1937.
KT2 Advert.
•Wireless World
•November 25, 1937.
'Stabilovolt' Voltage Stabiliser Advert.
•Wireless World
•March 2, 1939.
Brand Advert.
•Wireless World
•September, 1946.
TV Advert.
•Wireless World
•December, 1948.
Brand Advert.
•Radio Valve Data, Wireless World
•January, 1949.
Brand Advert.
•Festival of Britain Guide
•1951.
Brand Advert.
•Radio Valve Data 3rd Edition, Wireless World
•1952.
 
 

R

Q24

DEL210

L610

U12

KT2

HL2

HL2

X61MET

D41

PX4

KT33C

DH107

PCL84

X25
 
 
 
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