PHILIPS MODEL 645 'DOUBLE DUTY' (1951)

The Philips model 645 was manufactured by Philips Electrical Industries of N.Z. Ltd in 1951.

5-valve battery/mains portable.

6-valve (equivalent) portable battery/mains radio

Introduced Christmas 1950 for the 1951 season.

Uses 2 x type 482 45V 'B' batteries and a type 739 9V 'A' battery for the series-wired filaments.

1951 Philips  model 645

OTAGO DAILY TIMES 27 November 1950

Technical Information

Valves (5 + metal rectifier): DF91, DK40, DF91, DAF91, DL92, and Westinghouse Metal Rectifier (for mains use)

Intermediate Frequency: 455kc/s probably

Frequency Bands: 1

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

Caution!  Transformerless set.

1951 Philips  model 645

General Construction Notes for Philips Electrical Industries of N.Z. Ltd:

Model codes are explained on the Philips brand page.  Philips early-mid century were probably the Google of their time - they had branches in many countries and a global brand that everyone knew - and were apparently happy to let engineers come up with new ideas and implement them.  Construction is often overly complex but very well engineered - although repairs can also take a complex path.  They used time-in-motion studies to find the most cost effective way to asemble sets and sometimes this means repairs can be nightmarish (if you've ever worked on a V7A Theaterette this will be all too aparent).  U suffix model numbers are transformerless (hot chassis) sets and great care should be taken, or the sets avoided altogether.