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

Mike. Watterson · 9th Mar 2019, 5:59 pm

Same may apply to ICs and any record player stylus! New steel needles still sold (which are usually intended for single use, but is that one or both sides?).
Transformers are the tricky parts, but I've used mains transformers of suitable ratio for interstage on 1929 to 1939 sets and for output on battery or mains. For Mains single ended you either need to loosen the I off E on core or a slightly larger rating so it doesn't saturate. The DC cancels on push-pull outputs.
Rewinding is possible and only solution for the earphones, horns and moving iron paper cone speakers.

9th Mar 2019, 5:59 pm	#6
Mike. Watterson Heptode Join Date: Dec 2014 Location: Limerick, Ireland. Posts: 901	Re: Help identifying 1920s 1930s battery set Same may apply to ICs and any record player stylus! New steel needles still sold (which are usually intended for single use, but is that one or both sides?). Transformers are the tricky parts, but I've used mains transformers of suitable ratio for interstage on 1929 to 1939 sets and for output on battery or mains. For Mains single ended you either need to loosen the I off E on core or a slightly larger rating so it doesn't saturate. The DC cancels on push-pull outputs. Rewinding is possible and only solution for the earphones, horns and moving iron paper cone speakers.