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

swordholder · 10th Jan 2010, 10:20 pm

Hello All,
Ed has asked me what windings to put on the mains transformer.
I have opted for a 250v 100ma secondary (use a bridge rectifier)
3 windings for the DVM (6v)
LT -ve winding 30v.
Withe regard to the heater voltage would any prospective builders reply WITHIN THE NEXT 7 DAYS their requirements.
Please bear in mind that only the most popular voltages can be catered for (ALSO REMEMBER THAT THIS HAS TO BE SWITCHED AND THAT NORMAL SWITCHES CANNOT SWITCH HIGH CURRENTS AND ARE ALSO LIMITED IN THE NUMBER OF WAYS)
Please also bear in mind that the cost of the transformer will undoubtably rise with each heater tap.

Regards
Mike

10th Jan 2010, 10:20 pm	#49
swordholder Rest in Peace Join Date: Aug 2009 Location: East Preston, Sussex Posts: 162	Re: Homebrew Valve Tester Hello All, Ed has asked me what windings to put on the mains transformer. I have opted for a 250v 100ma secondary (use a bridge rectifier) 3 windings for the DVM (6v) LT -ve winding 30v. Withe regard to the heater voltage would any prospective builders reply WITHIN THE NEXT 7 DAYS their requirements. Please bear in mind that only the most popular voltages can be catered for (ALSO REMEMBER THAT THIS HAS TO BE SWITCHED AND THAT NORMAL SWITCHES CANNOT SWITCH HIGH CURRENTS AND ARE ALSO LIMITED IN THE NUMBER OF WAYS) Please also bear in mind that the cost of the transformer will undoubtably rise with each heater tap. Regards Mike