Artificial heater center tap question

[Bieworm]

Is there a difference between the use of 2x 100 ohm or 2x 220 ohm?

[kagliostro]

Different current flow, so different current consumption

a bit of info

http://www.valvewizard.co.uk/heater.html

Franco

[PRR]

No.

(Franco is not wrong; but in any tube amp the 0.017A difference is insignificant.)

[kagliostro]

I was meaning that the current consumption (the fact that the difference is minimal between the two values is irrelevant) is the (only) difference (I can see) in the two different options and the question was about difference in use of 100 or 220 ohm resistors


Franco

[pdf64]

As the value of such balancing resistors is increased, the poorer the effectiveness of the decoupling (ie to 0V circuit common) they provide. So if taken too far, problems could result, eg noise and unexpected coupling between various parts of the amp’s circuit.
So I suggest not to take their value too much higher than you’ve done, eg don’t go higher than 2 x 470ohms.

[Latole]

current consumption;

With 100 ohms ; one side is 6,3 / 2 = 3,15V

3,15/100 ohms = 0.0315 Amps

with 200 ohms : 3.15/ 200 = 0.0158 Amps