Radiobelle 47 restoration - UK Vintage Radio Repair and Restoration Discussion Forum

Downwind27 · 21st Aug 2017, 8:26 pm

Ancient novice in need of help here, all suggestions will be most welcome.
I picked up a Radiobelle 47 from my son's house in Belgium and would love to restore it. Looks complete and the cabinet is in good condition. I have found some capacitors stamped with a date of manufacture, they were made on the day I was born so you can understand my wish to get it going again.

So - firstly I would like a schematic of the workings, how do I go about finding a source?

The paper caps can easily be brought up to date but what do you experts do about the 16+16μF 450v? Are modern tubular electrolytics going to be up to the job?

I need to get myself some french polishing lessons too.

Thanks in advance for any help.
Tony

ms660 · 21st Aug 2017, 8:50 pm

Elektrotanya have the schematic for the 48a which is the gramophone version, I think the chassis and schematic is basically the same as the 47 so far as I can make out from the Radiomuseum pics.

Lawrence.

Nuvistor · 21st Aug 2017, 9:10 pm

16+16 550VDC available from and are up to the job.

https://crowthornetubes.com

Frank

Radio Tech · 22nd Aug 2017, 8:19 am

Hi Tony

You can get a dual electrolytic capacitor of the value you require from Jellyfish Audio, they are excellent and more than capable for the job in hand, and I must say at a reasonable price.

Ken

Downwind27 · 22nd Aug 2017, 6:07 pm

Thanks for the info ms660 - I now have the circuit.

Nuvistor - Crawthorne have sold out of 16+16

Ken - I can fit 2 seperate 16μF in the old can, cheaper that 16+16. Ordered from Jellyfish, thanks.

Tony

21st Aug 2017, 8:26 pm	#1
Downwind27 Tetrode Join Date: Sep 2009 Location: Loughborough, Leicestershire, UK. Posts: 95	Radiobelle 47 restoration Ancient novice in need of help here, all suggestions will be most welcome. I picked up a Radiobelle 47 from my son's house in Belgium and would love to restore it. Looks complete and the cabinet is in good condition. I have found some capacitors stamped with a date of manufacture, they were made on the day I was born so you can understand my wish to get it going again. So - firstly I would like a schematic of the workings, how do I go about finding a source? The paper caps can easily be brought up to date but what do you experts do about the 16+16μF 450v? Are modern tubular electrolytics going to be up to the job? I need to get myself some french polishing lessons too. Thanks in advance for any help. Tony

21st Aug 2017, 8:50 pm	#2
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Radiobelle 47 restoration Elektrotanya have the schematic for the 48a which is the gramophone version, I think the chassis and schematic is basically the same as the 47 so far as I can make out from the Radiomuseum pics. Lawrence.

21st Aug 2017, 9:10 pm	#3
Nuvistor Dekatron Join Date: Aug 2013 Location: Wigan, Greater Manchester, UK. Posts: 9,433	Re: Radiobelle 47 restoration 16+16 550VDC available from and are up to the job. https://crowthornetubes.com Frank

22nd Aug 2017, 8:19 am	#4
Radio Tech Nonode Join Date: Dec 2012 Location: Bocking, near Braintree, Essex, UK. Posts: 2,071	Re: Radiobelle 47 restoration Hi Tony You can get a dual electrolytic capacitor of the value you require from Jellyfish Audio, they are excellent and more than capable for the job in hand, and I must say at a reasonable price. Ken

22nd Aug 2017, 6:07 pm	#5
Downwind27 Tetrode Join Date: Sep 2009 Location: Loughborough, Leicestershire, UK. Posts: 95	Re: Radiobelle 47 restoration Thanks for the info ms660 - I now have the circuit. Nuvistor - Crawthorne have sold out of 16+16 Ken - I can fit 2 seperate 16μF in the old can, cheaper that 16+16. Ordered from Jellyfish, thanks. Tony