G6 Chassis Design

The G6 Chassis Design

The Philips G6 chassis made use of hybrid technology.  The design employed 21 thermionic valves, 17 transistors and 44 other semiconductor devices.  The initial Philips sets (pre-fixed G25) employed a Mullard 25inch (A63-11X 25 Colourscreen) shadow mask cathode ray tube (CRT).  The design used a 6 push-button integrated tuner covering VHF and UHF bands.  A tuning indicator was provided to assist with fine tuning of signals.  An audio tone control was also provided. The receivers made use of a Mullard DL1 glass delay line.

The dual standard set could receive the following channels:

Channels 1 to 3       Band IA To either 405 or 625 line Standard.
Channels 3 to 5       Band I
Channels 6 to 13     Band III
Channels 21 to 68   Band IV and V

G6 Panels (Click on images for a much larger detail)

The main chassis was mounted vertically (see Plate 1 below) at the rear of the cabinet and could be hinged backwards (see Plate 2 below) or removed completely for serving purposes.  All of the components not attached to the main chassis were connected by plug and socket interconnections.

G6 chassis1 final

Plate 1 – G6 Chassis (Dual Standard) in Upright Situation

G6 chassis lowered

Plate 2 – G6 Chassis (Dual Standard) in Lowered Situation

A separate convergence panel was used which contained the convergence controls, grid controls and grid switches.  This panel could be removed and placed on top of the cabinet to aid ease of serving.  Plates 3 and 4 below show the convergence panel from the top and underside.


G6 convergence panel

Plate 3 – G6 Convergence Panel Control Side

G6 internal convergence

Plate 4 – G6 Convergence Panel Underside

The G6 IF and colour decoder circuitry shared the same PWB – see Plate 5 below.

G6 IF & Decoder final

Plate 5 – G6 IF and Colour Decoder Panel

The G6 Timebase circuitry and tube base PWB’s are shown in Plate 6 and Plate 7.

G6 Timbease final

Plate 6 – G6 Timebase Panel

G6 tubebase

Plate 7 The G6 Tube base

Thanks to Stewart for the photos of his awesome G6 set.

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