6AS7 How do you heat this tube?

[lineup]

I'd like to know how you have heated 6AS7.
There must be several ways to do it.
It needs as much as 2.5 A current. That is very much.

Thanks

 

[Ryssen]

I use a 6.3 to 6.3v module to heat it.

 

[Suncalc]

I'd like to know how you have heated 6AS7.

Just an AC transformer secondary. Like in this amp. The amp is very quiet with no hum whatsoever.

 

[Magz]

A 2.5A heater is not that hard to do, AC or DC. The 833C in my avatar takes 10A at 10V on the filament, and being a DHT it needs clean DC to avoid hum. That is a bit more work.

 

[lineup]

Is it true that 6AS7 can take 13 Watt per triode?
Sounds much ....

 

[huggygood]

Do not confuse plate dissipation and power output.

 

[Tubelab_com]

The 6AS7 and 6080 will run at 13 watts per section of plate dissipation. You cannot get 13 watts of audio output from one section. The usual output is about 2 watts per section in class A. You can get 13 or more watts of audio from a single tube in push pull class AB1.

 

[soulmerchant]

I'd like to know how you have heated 6AS7.
There must be several ways to do it.
It needs as much as 2.5 A current. That is very much.

Thanks

Make sure your heater transformer can do at least 20-25W. I am also using some very nice boards from v4lve lover (like Ryssen, I expect).

 

[Demonkleaner]

I heat 10 of them and 4 6SN7’s with a switcher for my OTL’s. I built a filter for the output. Just make sure you over spec the switcher.

 

[Hilumine]

I think it is possible to use high frequency ZVS BJT circuit to generate large current and good durability then full wave rectification through supercapacitor, since this is high impedance and current load so it can use low voltage(I have not had the opportunity to approach the high-heat electric vacuum tube )