Elevated Heaters

[Cree]

I did a search of this topic But did not find an answer that I was wanting. When do you elevate the heaters or why do you elevate them?? Do it on every amp you build or only Hi gain PP out put. Should you elevate the heaters on any build even if its low watt triode output, Single ended only or on Push Pull Hi gain?? Sorry for the double statement, trying to clarify myself.

[tubeswell]

See section under ‘Heater Elevation’ on this link:


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

[trobbins]

More background detail is also provided in link - in particular pages 3-7:
https://www.dalmura.com.au/static/Hum%20article.pdf

[Cree]

Thank you Guys for the links. I have been to the Wizards site many times. The other link is new to me. Looks like I will incorporate this into my next project.