PHILIPS B5Z97A 'HILVERSUM PLANO' (1959)

The Philips B5Z97A was manufactured by Philips Electrical Industries of N.Z. Ltd in 1959. It's part of the Plano series of radios.

Other radios based on the same chassis:

6 valve plus magic eye tuning bandspread multi-band stereo radio

5-valve equivalent, there is no RF amplifier in this set, the 6th valve is a second output amplifier (for stereo).

The Philips B5Z97A is part of the Plano series of radios.

The Cambridge English dictionary describes Plano as flat [noun] a level, even part.  The Cambridge Spanish-English dictionary describes Plano as level [adjective] flat, even, smooth or horizontal.  Its easy to see how this name was used to describe these models when compared with the more box-like chest models that typically preceeded them.  The later models were known as the Conbrio, a shortening of the musical term 'Con Brio', meaning to be performed with liveliness or spirit.

There are two distinctly different chassis' - the earlier 1959 Plano model has mono-stereo and tone pushbutton switches at the top of the face and utilises output transformers, while the 1961 Conbrio update has no pushbuttons at the top, and balance / tone controls either side of the piano keys at the bottom of the face, and the new Hi-Z output where the output transformers are replaced by high-impedance speakers.

The radiogram models ending in '17A' have the Philips A2Z06A Reverberation unit fitted, and despite their model numbers matching the later chassis models and a date code (the middle numeral, '1' in this case) of 1961, they use the earlier chassis with output transformers.

The radios in this series are:

Technical Information

Valves (6 + magic eye): ECH81, EBF89, ECC83, EL84, EL84, EZ80 and EM80 Magic Eye

Intermediate Frequency: 455kc/s

Frequency Bands: 4

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

Similar to the F5Z17A / FL717A

Philips B5Z97A 'Hilversum Plano'

Philips B5Z97A 'Hilversum Plano'

Philips B5Z97A 'Hilversum Plano'

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.

Other documented models using this chassis (2 in total)

YEARMODEL NAME
1959 Fleetwood FL597A 'Stylemaster'