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Stromberg Carlson radio
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Return to top of page · Post #: 1 · Written at 9:48:05 AM on 26 October 2018.
	Bowler Location: Bongaree, QLD Member since 26 October 2018 Member #: 2308 Postcount: 89
Hi I have a Stromberg Carlson radio stamped 53966995, I believe this signifies model no 539.i cant find any reference to a model 539 and am in need of a circuit diagram.

Return to top of page · Post #: 2 · Written at 1:01:30 PM on 26 October 2018.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6761
Let us know what valves are in it.

Return to top of page · Post #: 3 · Written at 1:12:58 PM on 26 October 2018.
	Bowler Location: Bongaree, QLD Member since 26 October 2018 Member #: 2308 Postcount: 89
Hi GTC, T he valve lineup is 6J8, 6U7, 6B6, 6V6, 6U5 magic eye. it is a dual wave console radio.

Return to top of page · Post #: 4 · Written at 1:28:34 PM on 26 October 2018.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6761
What's the rectifier valve?

Return to top of page · Post #: 5 · Written at 2:38:24 PM on 26 October 2018.
	Bowler Location: Bongaree, QLD Member since 26 October 2018 Member #: 2308 Postcount: 89
SORRY THE RECTIFIER VALVE IS A 5Y3

Return to top of page · Post #: 6 · Written at 5:19:30 PM on 26 October 2018.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6761
Apart from the magic eye, that lineup was popular with S C radios. Here are some year models with it: 1939 F69 1940 541 1940 C40 1940 M40 1941 542 1941 C41 The only SC models I have doco for with 6U5 also have 25 volt rectifier and power output valves (25Z6G and 25L6G).

Return to top of page · Post #: 7 · Written at 11:54:36 PM on 26 October 2018.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5389
Can't see it in AORSM but it looks like it is a 1939 640

Return to top of page · Post #: 8 · Written at 12:43:50 AM on 27 October 2018.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6761
Console model 640 lineup has 2 x 6U7: 6U7G, 6J8G, 6U7G, 6B6G, 6U5, 6V6G and 5Y3G Has there maybe been a valve miscount?

Return to top of page · Post #: 9 · Written at 3:30:10 PM on 27 October 2018.
	Bowler Location: Bongaree, QLD Member since 26 October 2018 Member #: 2308 Postcount: 89
Hi Marcc and GTC. thanks for your input. the radio definitely has only one 6U7.

Return to top of page · Post #: 10 · Written at 1:49:32 PM on 28 December 2018.
	Relayautomatic Location: Canberra, ACT Member since 24 April 2012 Member #: 1136 Postcount: 168
Hello Bowler. This may be a bit late and sadly there is no circuit diagram but a Stromberg-Carlson Model 539 is listed in the 1939 Radio Trade Annual & Service Manual on Page 332. The listing shows the same valves types that you gave. It was an AC console model and cost 26 Guineas new. The IF frequency was 458Kc and it had a 12" speaker with a 1000R field coil. There are a number of circuit diagrams for other Stromberg-Carlson radios but none have a 5Y3G.

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