HMV MODEL 507RG 'AVON' (1951)

The HMV model 507RG was manufactured for His Master's Voice (New Zealand) Ltd by Collier & Beale Ltd in 1951.

Other radios based on the same chassis:

1951 Radiogram version of the 507D Wembley.  Dual-wave 6-valve + magic eye tuning.

Note the photos are of the Avon, but its been very nicely cut down to be a mantle radio - this was quite common in (relatively) recent years to give radiograms new life in smaller homes, or even just to fix a borer problem.


1951 HMV 507RG 'Avon'

Technical Information

Valves (6 + magic eye): 7B7, 7S7, 7B7, 7C6, 7C5, 7Y4 and 6U5 Magic Eye

Intermediate Frequency: 455kc/s

Frequency Bands: 2

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

Seen as 507D, 507D/RG and 507R/G

1951 HMV 507D Schematic

1951 HMV 507D Service Info

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.

Other documented models using this chassis (2 in total)

1951 HMV model 507D 'Wembley'