Antique radios, Old Time Radios

Duplex four SMC (S)

ID = 94787

Country: Great Britain (UK)	Manufacturer/Brand: McMichael Ltd., Slough
Year: 1932 ?	Type: Radio or Tuner
Valves / Tubes	4: 215SG HL2K HL2K PM22A

Principle	TRF with reaction (regenerative); 2 AF-stage(s)
Tuned circuits	2 AM circuit(s);
Wave bands	Broadcast (MW) and Long Wave.
Power type and voltage	Batteries (storage and/or dry) / 2 / 126 Volt
Loudspeaker/pwr.out	Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / 0.3 W / Ø 12.7 cm = 5 inch
from Radiomuseum.org	Model: Duplex four SMC
Material	Leather / canvas / plastic - over other material
Shape	Portable, e.g. Portable Radio (with or without mains > 8 inch).
Dimensions (WHD)	390 x 220 x 380 mm / 15.4 x 8.7 x 15 inch
Notes	This is a leathercovered suitcase model. The lid of the case contains the frame aerial and the loudspeaker.

This model was suggested by Walter Knutsen.

All listed radios etc. from McMichael Ltd., Slough
Here you find 127 models, 24 with images and 67 with schematics.

Forum contributions about this model
McMichael Ltd., : Duplex four SMC
Threads: 1 | Posts: 2

Hits: 273 Replies: 0 mcmichael: SMC (S); Duplex four
Claus Kunze 20.Jul.07	1 mcmichael: SMC (S); Duplex four In der Zeitschrift "The Wireless & Electrical Trader" v.15.April 1938 wird die Mazda 220 als Endröhre angegeben
Konrad Birkner 20.Jul.07	2 Falschinformation im Forum Danke, aber bitte auf genaue Angaben achten. Im Trader Service Sheet 307 vom 16.April 1938 (nicht 15.April) steht nicht 220, sondern Pen220. Die Mullard PM22A hat diverse Äquivalenzen, u.a. von Mazda die im Trader erwähnte Pen220, aber auch Six-Sixty 220Pen, Standard PenB1, MOS und Ferranti PT2, Ever-Ready K70B, Cossor 220HPT. Das "Pen" ist hier wichtig und darf nicht einfach weggelassen werden.

McMichael Ltd., : Duplex four SMC
End of forum contributions about this model