Current limit for 6.3 V winding?

[vetmed]

I see from some of the recommended tube subs that the current can exceed 3 amps e.g. 12bh7 and 6080. What is the maximum current available from this winding?

Robert Lees

[Paul Joppa]

It was designed for 3.5 amps total. That's pushing it, the filament winding is the hottest of the windings. I do not recommend exceeding 3.5 amps by any amount at all.

[grufti]

I decided to add another transformer for the filaments when I switched to the E80CC / 5998 tube combination. It is a tight squeeze under the hood, but it fit and it works great for me.

It will hopefully pay off too, when I modify the Crack for the higher current operating point that is being talked about.