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 Radio of the Week valve lineup
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 Return to top of page · Post #: 1 · Written at 2:59:22 PM on 13 December 2013.
Maven's Gravatar
 Maven
 Location: Canberra, ACT
 Member since 23 August 2012
 Member #: 1208
 Postcount: 584

.Brad - you list the valves as 6M5, 6N8, 6X5GT and unknown. I bet the unknown is a 6AN7, as listed for an Airzone 1953 model and consistent with Philips circuits of those years. Are you sure you got the right year of manufacture?

Maven


 
 Return to top of page · Post #: 2 · Written at 3:38:44 PM on 13 December 2013.
MonochromeTV's avatar
 MonochromeTV
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1182

Maven,
I reckon you might be right. I also reckon it might be a model A120 friom 1953.

It is, as well, a bit unusual for a Airzone as they continued to use octal type valves when other manufacturers were moving on to miniature 7 & 9 pin types. When Airzone did start to use miniature valves they tended to favour the 7 pin types.
 
 Return to top of page · Post #: 3 · Written at 9:41:51 PM on 13 December 2013.
Brad's avatar
 Brad
 Administrator
 Location: Naremburn, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 7300

This receiver uses a chassis that featured in several models and different cabinet materials, they being Bakelite and timber. I once had a collection of six variations and noticed that there was a chassis with octal valves, a chassis with baseless valves and a chassis with a mix of each.

I would say the life cycle of this chassis would be at least five years.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 4 · Written at 10:07:35 PM on 13 December 2013.
Marcc's avatar
 Marcc
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5253

I did comment on that one ages ago. It I think appears in AORSM's. I have fixed at least one of them.

If it's got 9 pins on the Pentagrid its more than probable that it is a 6AN7.

Marc


 
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