Hivac

Valve List

Brand Advert. •Practical Wireless •April 8, 1933.

H210, L210, D210, P220, PP220, SG210 & VS210 Advert. •Wireless World •August 18, 1933.

SG210, H210, D210 & B210 Advert. •Wireless World •September 8, 1933.

H210 L210 D210 P220 PP220 PX230 SG210 VS210 Y220 Z220 & B220 Advert. •Wireless World •November 17, 1933.

H210 L210 D210 P220 PP220 PX230 SG210 VS210 Y220 Z220 & B220 Advert. •Wireless World •December 8, 1933.

H210 L210 D210 P220 PP220 PX230 SG210 VS210 Y220 Z220 & B220 Advert. •Valve Data Booklet, Wireless World •1933.

Brand Advert. •Wireless World •August 17, 1934.

Brand Advert. •Wireless World •September 14, 1934.

Brand Advert. •Wireless World •September 28, 1934.

Range Advert. •Wireless World •November 30, 1934.

SG220 Advert. •Popular Wireless •January 19, 1935.

Brand Advert. •Wireless World •August 23, 1935

P215, P220, PP220, AC/L and AC/Y Advert. •Wireless World •October 18, 1935.

Harries Critical Distance Valves. •A Guide to Amateur Radio, RSGB •1936.

Harries Critical Distance Valves. •Wireless World •September 4, 1936.

SG220SW, D210SW & Y220 Advert. •Wireless Retailer and Broadcaster •October 10, 1936.

SG220SW, D210SW & Y220 Advert. •Wireless World •May 7, 1937.

CRT's Advert. •Wireless World •November 10, 1938

Harries All Stage A15 Valve Advert. •Practical and Amateur Wireless •January 21, 1939.

D210, VP215 & Y220 Valves Advert. •Practical and Amateur Wireless •March 18, 1939.

CR3 Cathode-Ray Tube Advert. •Unknown •1939.

Specialists in Midget Valves Advert. •Wireless World •March, 1943.

Miniature or Midget Valves Advert. •Wireless World •December, 1944.

XY1.4A & XW0.75A Advert. •Wireless World •March, 1948.

Small Valves. •Radio Valve Data, Wireless World •December, 1948.

CC2R Advert. •Wireless World •November, 1950.

XFW20 Advert. •Wireless World •December, 1950.

NT2 Advert. •Wireless World •December, 1951.

Brand Advert. •Radio Valve Data 3rd Edition, Wireless World •1952.

XFY32 Advert. •Wireless World •September, 1952.

XFY30 Advert. •Wireless World •November, 1952.

XFY31 Advert. •Wireless World •December, 1952.

XFW30 Advert. •Wireless World •June, 1953.

XFY42 Advert. •Wireless World •November, 1953.

XFW40 Advert. •Wireless World •May, 1954.

Difference Diode XC14 Advert. •Wireless World •June, 1954.

Flat Subminiature Range Advert. •Wireless World •November, 1954.

Brand Advert. •Wireless World •August, 1955.

XR4 Advert. •Wireless World •November, 1955.

Triode Electrometer XE2 Advert. •Wireless World •June, 1956.

Cold Cathode XC18 Advert. •Wireless World •August, 1956.

XE2 & XE3 Electrometer Triodes Advert. •Wireless World •August, 1957.

Directly Heated Subminiature Valves Advert. •Wireless World •February, 1958.

Indirectly Heated Subminiature Valves Advert. •Wireless World •March, 1958.

Cold Cathode XC18 Advert. •Wireless World •May, 1958.

XB1 & XB2 Baretter Advert. •Wireless World •June, 1958.

XC23, XC18 & XC22 Advert. •Wireless World •December, 1958.

Cold Cathode Tubes Advert •Wireless World •January, 1959.

XR9 Advert. •Wireless World •September, 1959.

Numicator Digital Display Advert. •Wireless World •July, 1960.

Cold Cathode Tubes Advert. •Wireless World •October, 1960.

21 Years of Service Advert. •Wireless World •January, 1961.

Numicator Digital Display Advert. •Wireless World •October, 1961.

XFY21

XSG

L210