Driver heater grounding.

Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

My driver (6C6) heaters are not grounded. The heaters for the stereo amp are run in series from the 6.3V CT secondary winding on main power transformer. However, the CT is ungrounded. I currently measure 2mV (actually 1mV to 2mV) noise on the amp outputs and the noise is not irritating on my ~ 99dB eff speakers. But in the interest of better practice/ performance, should I:
1/ connect the CT to 0V signal ground;
2/ ground one side of the heater; or
3/ not be a doofus and simply leave well enough alone?
Any thoughts?
Cheers,
Ray

"In the beginner's mind there are many possibilities, in the expert's mind there are few." Shunryo Suzuki

Edits: 10/27/14

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Topic - Driver heater grounding. - RC Daniel 23:59:13 10/26/14 (3)

Thanks guys - I am a doofus! - RC Daniel 14:30:10 10/28/14 (0)

RE: Driver heater grounding. - Caucasian Blackplate 11:23:51 10/27/14 (0)

RE: Driver heater grounding. - Al Noakes 01:06:57 10/27/14 (0)

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