Hybrid Valve / Transistor Portable Multiband Radio
In the crossover between valves and transistors some manufacturers found ways to combine both - for example Bell had the 34P7. Philips produced this little gem, the Transworld Portable, which uses valves in the RF stages and uses solid state parts in the audio stages.
2 versions released - according to the schematics the MK1 was produced in 1957, and the MK2 the following year in 1958.
517 - 1610 kc/s - BC
1.6 - 4 mc/s - SW3
5.9 - 12.1 mc/s - SW2
12.1 - 22.1 mc/s - SW1
Batteries - 1 x 467 (67.5V), 8 x 950 (D-cell?)
Intermediate Frequency: 452kc/s
Frequency Bands: 4
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.