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 Refurbishing an Operatic 37MA
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 Return to top of page · Post #: 1 · Written at 9:11:39 PM on 5 August 2016.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 574

Here is my story about tarting up a Operatic 37MA. It is my first genuine Bakelite cabinet mains radio
Unfortunately it was a bit chopped about to go to the point of RESTORATION so I just fixed the mess up and then TARTED it up and made a goer out of it.
There was plenty for me to learn doing this as it has had a transformer burn out and the replacement of that was less than professional. So once more I had to drill holes and straighten a mess up and then redesign the circuitry a bit to make it work in a more logical way. It is a nice little performer in the end. I also found out where to get speaker cloth in many different designs.

Fred.

Refurbishing an Operatic M37


 
 Return to top of page · Post #: 2 · Written at 11:14:20 PM on 5 August 2016.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 5511

File uploaded.

This cabinet was used by several companies. The original radio in this cabinet was a Kriesler and half a dozen brands appeared soon after. I am not certain as to whether each company put their own chassis in or Kriesler supplied them too.


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

 
 Return to top of page · Post #: 3 · Written at 12:07:13 AM on 6 August 2016.
Robbbert's avatar
 Location: Sydney, NSW
 Member since 18 September 2015
 Member #: 1801
 Postcount: 1074

Regarding your problems with 2RPH, I believe they transmit from the original 2WS site on Leabon's Lane, Seven Hills, on the same original frequency (1224).

I used to repair my radios here, which is only about 10km from the main ABC transmitter at Prestons. So 2FC and 2BL (50 KW each) totally blasted away the other stations at the lower end of the dial. I would carefully adjust the radio so that a country ABC station on 548 was audible without 2FC on 576 wiping it out, and at the same time, making sure 2FC & 2BL didn't distort. This allows proper reception of country stations without overloading and other nasty effects.


 
 Return to top of page · Post #: 4 · Written at 7:02:29 PM on 6 August 2016.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1043

The Kriesler bakelite cabinet Brad referred to was made by Marquis Mouldings of Arncliffe, NSW. It also at times has been referred to as the Aegis cabinet.

There is a PDF of Marquis products floating around here in the Forums.

Marquis Plastics


 
 Return to top of page · Post #: 5 · Written at 7:37:59 PM on 6 August 2016.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 5511

On the last page of the linked document.


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

 
 Return to top of page · Post #: 6 · Written at 10:44:27 AM on 7 August 2016.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 574

Thanks for the extra info, I remember Commonwealth Moulding now and see the cabinet is in the Marquis Plastics sheet as part MRC1. That also showed the knobs should be MNK3's and I have a couple of those in a box somewhere.
I note that Marquis call the cabinet "plastic" probably because that was the cutting edge word back then but this cabinet is definitely a thermosetting Bakelite looking and smelling material.
Fred..


 
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