Do It Yourself (DIY) paradise for tube and SET project builders.
Message Sort: Post Order or Asylum Reverse Threaded
ECC99 Pin 9 confusion
50.80.146.114 |
||
Posted on February 14, 2017 at 09:38:00 | ||
Posts: 1008
Joined: January 19, 2006 |
I am confused about the filament heater wiring for pins 4, 5 and 9. I have read various information on the audio blogs and no definitive answer. I want to use only 1/2 of the ECC99 with a 6.3V for the heater. So, which pin(s) should get the heater voltage (pins 4 only, 4 and 5, 4 and 5 tied together)? Where should I connect pin 9? Any help would be greatly appreciated. I will be doing a nice write-up on the ECC99 and 2A3 tubes for Audio Asylum in the near future. Thus, I want to ensure that the tubes are connected correctly and biased optimally. Thanks, Pat. |
RE: ECC99 Pin 9 confusion, posted on February 14, 2017 at 13:21:43 | |
Posts: 1008
Joined: January 19, 2006 |
Thanks, very helpful. |