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Return to top of page · Post #: 1 · Written at 1:39:57 PM on 18 March 2016.
	Zamiac Location: Tynong North, VIC Member since 9 April 2009 Member #: 464 Postcount: 37
Can anyone help with the make and model of this radio, the valve lineup is 6A7,6B7,6B7,42 and 80. Thanks. John Ely.

Return to top of page · Post #: 2 · Written at 2:41:50 PM on 18 March 2016.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6761
A few sets of the late 1930s had that or similar lineups. The 2 x 6B7 seems unusual -- maybe Astor or Monarch. Is it a dual wave set? Mantel or console? Also, photos can often be a guide: https://vintage-radio.com.au/default.asp?id=image-submission-guidelines

Return to top of page · Post #: 3 · Written at 5:16:10 PM on 18 March 2016.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5389
More likely 6D6 as a first IF is more believable and that is not pin compatible with 6B7. Don't bother to power it it likely won't go & got flipped for that reason & caps will need doing anyway after some rudimentary other checks. including how those two sockets are wired. Marc

Return to top of page · Post #: 4 · Written at 5:29:40 PM on 18 March 2016.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6761
Yes, plenty of candidates if it's meant to be a 6D6. Photo needed in that case.

Return to top of page · Post #: 5 · Written at 10:51:52 PM on 18 March 2016.
	Brad Administrator Location: Naremburn, NSW Member since 15 November 2005 Member #: 1 Postcount: 7395
Astor Aladdin. Not sure of the model number. There was another version with telephone dial type tuning for major stations. ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾ A valve a day keeps the transistor away...

Return to top of page · Post #: 6 · Written at 11:03:35 PM on 18 March 2016.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6761
Okay, as it's an Astor mantel, the valve line-up as given appears to be correct for either a model GA (1937) or a model CF (1938), with one of those valves being a 6B7S. The CF is described as having "Presto" automatic tuning, so I guess this must be the GA. Here's one in very good condition: http://www.mossgreen.com.au/images/lot/3336/33360_0.jpg ... and here's a Presto tune version: http://www.radiomuseum.org/images/radio/astor/aladdin_cd_1894093.jpg Zamiac: I've emailed you the schematic in case you need it.

Return to top of page · Post #: 7 · Written at 11:49:07 PM on 18 March 2016.
	Robbbert Location: Hill Top, NSW Member since 18 September 2015 Member #: 1801 Postcount: 2078
That should come up nicely once the chassis etc is cleaned, and those old caps replaced.

Return to top of page · Post #: 8 · Written at 7:16:59 PM on 19 March 2016.
	Tallar Carl Location: Latham, ACT Member since 21 February 2015 Member #: 1705 Postcount: 2174
Found this one on ebay:- http://www.ebay.com.au/itm/111940832694

Return to top of page · Post #: 9 · Written at 9:37:53 PM on 19 March 2016.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5389
That set has been worked on before, one of those wets looks like it is insulated from the chassis. That indicates back bias (which it has) & that needs to be checked to see that it is wired as it should be. Change all of the electrolytic caps and check resistors as you go. As usual I would not use less than 500V caps. They have actually used two 6B7's and are using the first one as the (probably) delayed AGC / AVC and the second as the detector for the audio. Marc

Return to top of page · Post #: 10 · Written at 11:04:01 AM on 20 March 2016.
	Zamiac Location: Tynong North, VIC Member since 9 April 2009 Member #: 464 Postcount: 37
Thanks for your replies , and thanks GTC for the circuit diagram ,the set is a little different to most with three IF transformers, I will let you know how I go with the repair. Regards John.

Return to top of page · Post #: 11 · Written at 12:51:57 PM on 20 March 2016.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6761
Always happy to help where I can.

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