Quote:
Originally Posted by jr_tech
So does the Australian version only have 5 tubes? What did they leave out? Perhaps selenium rectifiers were used  |
Hard to tell what they did, no schematics at Nostaglia air (not that I expected, but was worth a try) or elsewhere. There has been manufactured a loctal full wave rectifier, a 7Z4, which *might* be the tube next to the transformer. And the tube all the way to the front next to the tuning cap *might* be the audio output, but that's an odd place to have it (heat from it may make the local oscillator tank circuit drift as the radio warms up). Odd that they'd have a shield on what may be the pentagrid converter tube (may make sense if it's an RF stage, can't tell if the tuning cap has 2 or 3 sections). Rather thin looking IF transformers. The tube between the two such transformers is most likely the IF stage, and the next tube to the right (as seen in the picture) is likely a detector/audio driver. Unlikey the RF stage (if there is one) as it's too far away from the tuning cap.
Wonder if these sets were sold elsewhere in the 220V 50Hz world. Australia's population I understand is something like 25 million today, and must have been around 5 million back in 1948, would be a tiny market.