Wavemeter, type TF975
1954-1969
General radio wavemeter, type 758A, 1942
1942
Telefunken wavemeter PQK2
Telefunken wavemeter, 1908
1908
Sullivan heterodyne wavemeter model K5, No. 21 1922
1922
Forward spark 'B' wavemeter 80 meters, 1914-1918
1914-1918
German cavity wavemeter
Wavemeter, wireless telegraphy, German No. 469
Japanese absorption wavemeter
Wavemeter C
Siemens wavemeter
H W Sullivan absorption wavemeter, s/n 1274, 1936
H.W.Sullivan wavemeter s/n 1565/1939
Heterodyne wavemeter, made by Burndept Ltd, c.1923
1923
McLachlan-Sullivan modulated C.W. wavemeter
German crystal wavemeter type PQK 1 s/n 15651/1939
Air Ministry Wavemeter type W1117, c. 1939
1939
Telefunken wavemeter PQK3
Wavemeter used on the first transatlantic television transmission
Short-wave sub-standard wavemeter
German wavemeter
Sullivan and Griffiths substandard wavemeter, type R209, 1947
1947
Absorption wavemeter
1945
Sullivan and Griffiths substandard wavemeter, type R209, 1947
1947