UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

retailer · 10th Jan 2023, 12:31 am

I got a chance to run the amp for around 2 hours, and used my non contact thermometer to check temperature rise, the ambient temp in the workshop was around 31C and the transformer made it to 49-50C after 2 hours. I did a few voltage checks and found one of my filament windings is under voltage at around 5.99V - I had to wind these by hand and some how messed one of them up, this is not so bad as I wasn't 100% happy with it, and in the back of my mind I was thinking of trying something different, gives me a good excuse to unwind the filament windings.

10th Jan 2023, 12:31 am	#20
retailer Heptode Join Date: May 2005 Location: Adelaide, South Australia Posts: 541	Re: Rewind Dynaco mains Tx for 240V I got a chance to run the amp for around 2 hours, and used my non contact thermometer to check temperature rise, the ambient temp in the workshop was around 31C and the transformer made it to 49-50C after 2 hours. I did a few voltage checks and found one of my filament windings is under voltage at around 5.99V - I had to wind these by hand and some how messed one of them up, this is not so bad as I wasn't 100% happy with it, and in the back of my mind I was thinking of trying something different, gives me a good excuse to unwind the filament windings.