referencing heater supply ground to B+

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I've seen circuits where the heater supply ground is reference to B+.
I've seen people used 1/4B+ or 1/2B+.
how do I determine the right ratio?
I'll be using a 6CG7 and according to this datesheet (http://www.mif.pg.gda.pl/homepages/.../093/6/6CG7.pdf),
the heater voltage with respect to ground:
DC component: 100V
total DC and peak : 200V
My B+ is 150V. I'm wondering if it's a good idea if I use 2x 100K resistors (thus referencing my heater to 1/2B+ = 75V)
Thank you.

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Topic - referencing heater supply ground to B+ - jarthel 16:47:11 03/12/07 (3)

Here's a thread relating to this - nerdorama 21:55:34 03/12/07 (0)

Re: referencing heater supply ground to B+ - Ian L 20:20:54 03/12/07 (0)

Re: referencing heater supply ground to B+ - Tom Bavis 17:19:13 03/12/07 (0)

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