The Gulbransen model 6152 was manufactured for H. W. Clarke Ltd by Collier & Beale Ltd in 1952.

6-valve broadcast band mantle radio

Be careful with these - the cabinets are particularly fragile, particularly the slats on the back.

1952 Gulbransen  model 6152 'Warwick'
Radio and Electronics, September 1952

Technical Information

Valves (6): 6BA6, ECH21, 6BA6, 6AT6 or 6AV6, 6AQ5, 6X4

Intermediate Frequency: 455kc/s

Frequency Bands: 1

Chassis Notes(most schematics can be clicked to download a full size version)

1952 Gulbransen  model 6152 'Warwick'

1952 Gulbransen  model 6152 'Warwick'

General Construction Notes for Collier & Beale Ltd:

Model numbering followed no real sensible scheme until around 1940 - and prior to 1934 apparently no model numbers were assigned at all.

From 1940 a 3- or 4-digit system was employed where the first digit indicates the number of valves, the second digit is the number of bands and the third is the year of manufacture.  From 1950 the last digit became two digits, eg: 5151 is a 5-valve broadcast-band only from 1951.

From 1957 model numbers were replaced with model names, ie the Pacemaker Buffalo - which makes the year of manufacture hard to determine unless service info is consulted (although C&B often released service info after the radio, and the date on the service info was for its release, not that of the model.