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Stromberg Carlson "ROYALE"
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Return to top of page · Post #: 16 · Written at 22:26:29 on 25 August 2010.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5511
With 9 pins the probability of a 6AN7 is high, Its a Triode Hexode Mixer. It would be hard to identify from a photo. Comparison with a known 6AN7 would be better. I would predict 6AN7 converter, 6N8 RF AMP, One 6N8 as detector, one as phase splitter. I have seen a radio like this in the last few years. I may have to look through some paper work, I know one 6N8 was a dud. Marc

Return to top of page · Post #: 17 · Written at 22:39:58 on 25 August 2010.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5511
My memory serves me well 71A31 and it went across the bench 21/12/2008. As per flakes... I also have a circuit, know which collector has it and can likely get it to photograph if required. This one had a nasty AGC problem, no prize for guessing the cause. Marc

Return to top of page · Post #: 18 · Written at 05:15:17 on 26 August 2010.
	Flakes Location: Adelaide, SA Member since 27 February 2010 Member #: 630 Postcount: 398
I sent a copy of the diagram to Brad. You should get it. I hope it is what you are after! Daniel ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾ Valve radios, They just don't make them like they used to

Return to top of page · Post #: 19 · Written at 06:46:08 on 26 August 2010.
	VK5PO Location: Lewiston, SA Member since 20 July 2010 Member #: 703 Postcount: 12
The tone and bass switches are 3 pos each... two speakers in parrallel No phono i/p I reckon you fellows are on the money! I used to have 100's of radios..yes 100's.... got some pictures here somewhere... ex - wife trashed a lot of them... I still am saddened greatly to think about it.. I only have 2 now...the SC and my STC 418. I have restored that fully...the timberwork is beautiful! my email address is available by clicking on my info Greatly appreciated gentlemen...Thanks John

Return to top of page · Post #: 20 · Written at 11:19:45 on 26 August 2010.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5511
One can drool at some of the stuff that passes across my bench. Four or so of them have been in Silicon Chip. and there are two very interesting sets 1920' & 1930's that bits are being gathered for. Both have a shot coupling transformer. Some of the American ones with things like 18 valves & parts inside IF cans. These can really kill time, especially when the last persons workmanship was not good and it lists 65 capacitors and you know that the breed of Mica's in it are normally all duds. If you get into strife with that set, at least (if it's that one) I know where to get one for comparision and at least have some familiarity with it. Marc

Return to top of page · Post #: 21 · Written at 21:02:38 on 26 August 2010.
	VK5PO Location: Lewiston, SA Member since 20 July 2010 Member #: 703 Postcount: 12
Cheers Marc... Got the c/dia now! Thanks very much for your help! do you have a valve placement diagram of this radio? cheers John

Return to top of page · Post #: 22 · Written at 22:28:09 on 26 August 2010.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5511
I can get, may take a couple of days. Should be fairly easy 6AN7 will have wires going to the band switches & be close to the tuning gang. 5Y3 cannot be wrong. I think the splitter is toward the front of the chassis in an awkward spot. The 6M5 plates will head for the speaker transformer & their cathodes (pin 3) join & go to earth via a single 80 Ohm resistor. Marc

Return to top of page · Post #: 23 · Written at 21:48:06 on 27 August 2010.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5511
Info:-- Looking at the back. 6AN7 is on the left front next to the Gang. 5Y3 left of Middle back of chassis 6M5's together at the rear right. I remembered that there was something odd about this set. the first 6N8 is reflexed and takes the audio off a cathode follower. Note also agc is taken off one diode plate. Many manufacturers had stopped using reflexing by this time. This is more of a paraphase push pull as the remaining 6N8's (triode connected) are feeding the 6M5's individually. Be careful with the feedback wire from the secondary of the speaker transformer. If it's reversed the set can oscillate. Marc

Return to top of page · Post #: 24 · Written at 1:35:25 PM on 6 August 2011.
	Moypoyka Location: Bondi Junction, NSW Member since 6 August 2011 Member #: 973 Postcount: 12
Hello. I'm new having discovered this web site when in trying to identify the radio model of my newly acquired Stromberg\Carlson Royale unit, I was directed to this thread. I'm certain this is the same model, being # 71A31. Can anyone supply me with a schematic or advise how I can get one? Bill.

Return to top of page · Post #: 25 · Written at 4:24:51 PM on 6 August 2011.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6843
If you unhide your email address in your profile, I'll send you the 71A31 schematic.

Return to top of page · Post #: 26 · Written at 10:33:56 PM on 6 August 2011.
	Moypoyka Location: Bondi Junction, NSW Member since 6 August 2011 Member #: 973 Postcount: 12
GTC Thank you. I've changed the settings now.

Return to top of page · Post #: 27 · Written at 12:05:25 AM on 7 August 2011.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6843
Okay, schematic sent.

Return to top of page · Post #: 28 · Written at 3:51:26 PM on 7 August 2011.
	Moypoyka Location: Bondi Junction, NSW Member since 6 August 2011 Member #: 973 Postcount: 12
Received and much appreciated - thank you. I believe this to be the superior and more complex of the three units I've bought so as I'm a beginner I'll start on the simpler model first. However before I even lift a soldering iron or a pair of cutters there's plenty of homework to do first. I also need to set up a work area. I will report my progress on this thread with my S-C as I get there.

Return to top of page · Post #: 29 · Written at 2:48:22 AM on 8 August 2011.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6843
Alternatively, you might like to add to this thread on current projects: http://vintage-radio.com.au/default.asp?f=2&th=189

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