DUCASTEL AC563 no sound - Page 3 - UK Vintage Radio Repair and Restoration Discussion Forum

kentplums · 15th Jun 2018, 2:58 pm

Pic...

ms660 · 15th Jun 2018, 4:22 pm

You could run it from a suitably rated 115 volt transformer without too much modification, anode of the rectifier connected to 115 volt, perhaps in series with a low value resistor, a couple of 12v 200mA bulbs in series with the valve heater chain connected to 115 volts.

Lawrence.

kentplums · 16th Jun 2018, 8:58 am

Having spoken to Gerry at Crowthorne tubes, and done the appropriate calculations, I'm going to replace the R20N with a 25w bulb.
If anyone sees any pitfalls please let me know!
Cheers
R

kentplums · 7th Jul 2018, 1:32 pm

Back to the transformer, where can I source something suitable? Not much at RS or Cricklewood...
Cheers
R

kentplums · 21st Jul 2018, 1:26 pm

Good reception now...thaks all.
Video available on youtube

RR

kentplums · 14th Aug 2018, 1:07 pm

Just to draw a line under this one, herewith picture of a beautiful R20N donated by a very kind Jean-Yves from the French site Rétro-Forum.
Merci beaucoup Jean- Yves!

Santé
R

crackle · 14th Aug 2018, 4:40 pm

I was advised that a mains tungsten halogen bulb GU10 type was the best substitute for a baretter, they come in various wattages.

Is that wirewound resistor covered in an asbestos material?

Mike

kentplums · 14th Aug 2018, 5:04 pm

Well I never thought of that. Were resistors of this vintage asbestos coated? Maybe I should seal the offending article with PVA or similar?

R

15th Jun 2018, 2:58 pm	#41
kentplums Hexode Join Date: Nov 2012 Location: Limoges, Haute-Vienne, France. Posts: 280	Re: DUCASTEL AC563 no sound Pic... Attached Thumbnails

15th Jun 2018, 4:22 pm	#42
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: DUCASTEL AC563 no sound You could run it from a suitably rated 115 volt transformer without too much modification, anode of the rectifier connected to 115 volt, perhaps in series with a low value resistor, a couple of 12v 200mA bulbs in series with the valve heater chain connected to 115 volts. Lawrence.

16th Jun 2018, 8:58 am	#43
kentplums Hexode Join Date: Nov 2012 Location: Limoges, Haute-Vienne, France. Posts: 280	Re: DUCASTEL AC563 no sound Having spoken to Gerry at Crowthorne tubes, and done the appropriate calculations, I'm going to replace the R20N with a 25w bulb. If anyone sees any pitfalls please let me know! Cheers R

7th Jul 2018, 1:32 pm	#44
kentplums Hexode Join Date: Nov 2012 Location: Limoges, Haute-Vienne, France. Posts: 280	Re: DUCASTEL AC563 no sound Back to the transformer, where can I source something suitable? Not much at RS or Cricklewood... Cheers R

21st Jul 2018, 1:26 pm	#45
kentplums Hexode Join Date: Nov 2012 Location: Limoges, Haute-Vienne, France. Posts: 280	Re: DUCASTEL AC563 no sound Good reception now...thaks all. Video available on youtube RR

14th Aug 2018, 1:07 pm	#46
kentplums Hexode Join Date: Nov 2012 Location: Limoges, Haute-Vienne, France. Posts: 280	Re: DUCASTEL AC563 no sound Just to draw a line under this one, herewith picture of a beautiful R20N donated by a very kind Jean-Yves from the French site Rétro-Forum. Merci beaucoup Jean- Yves! Santé R Attached Thumbnails

14th Aug 2018, 4:40 pm	#47
crackle Rest in Peace Join Date: Mar 2011 Location: Basildon, Essex, UK. Posts: 4,100	Re: DUCASTEL AC563 no sound I was advised that a mains tungsten halogen bulb GU10 type was the best substitute for a baretter, they come in various wattages. Is that wirewound resistor covered in an asbestos material? Mike

14th Aug 2018, 5:04 pm	#48
kentplums Hexode Join Date: Nov 2012 Location: Limoges, Haute-Vienne, France. Posts: 280	Re: DUCASTEL AC563 no sound Well I never thought of that. Were resistors of this vintage asbestos coated? Maybe I should seal the offending article with PVA or similar? R