Heater question
Posted: Sun Jun 16, 2013 4:22 am
I am building a 36watt amp and am using a reclaimed tranny. It has only enough power in the 6.3v winding for the 4 EL84's.
The original amp had a plus and minus 12.6v DC supply for electronics and 4 x ECC83's
I am using one leg of that 13-0-13 winding to give 12.6v AC for 3x ECC83
Should I virtual centre-tap both heater windings to ground (would this work?) or elevate the 6.3v to pin 3 (cathode bias) of the EL84 as many builders do (like Ampmaker) and CT the 12.6 to ground?
Thanks
John
The original amp had a plus and minus 12.6v DC supply for electronics and 4 x ECC83's
I am using one leg of that 13-0-13 winding to give 12.6v AC for 3x ECC83
Should I virtual centre-tap both heater windings to ground (would this work?) or elevate the 6.3v to pin 3 (cathode bias) of the EL84 as many builders do (like Ampmaker) and CT the 12.6 to ground?
Thanks
John