Stupid Filament Virtual Tap question

[someguy]

Here's the stupid question; if you are using a virtual ground, because the amp lacks a center tap or the 60hz hum is terrible, does it matter THAT much if its elevated or not? Couldn't you simply put a 100 ohm resistor from both heater wires to the chassis ground? I've heard of people connecting the heater pins to the cathode, but since I am doing a pcb build, thats not an option. Are there any clear problems with this?

I apologize in advance if this has already been discussed, but I couldn't find any clear cut answers.

Thanks, Brett

[FYL]

A virtual balanced ground is OK in most cases, elevating heaters helps in some amps and is required if you're close or above max heater to cathode voltages (cathode followers, etc.).

[M Fowler]

You can start with your planned to 100r to ground and see how the noise level is. Then if needed you can elevate voltage.

[someguy]

Thanks's for the responses; I guess if I get tons of hum I'll have to try elevate them, but I doubt I'll have to.