Tubes?

[pese]

 .

[turbo]

in my tube it is like this, and only one plate conducts during a half cycle and the other during the other half, therefore i cannot see a 500VDC closed loop on the coil of the htr transformer.
it must be me who is going nuts.
i will measure the ac aswell as the dc voltage on the htr transformer coil.
i do see how the 5VAC can combine with the HV dc output, but i do not see how the 500VDC combines with the 5VAC in the htr coil.

Marco.

[pese]

 .

[z_p_e]

Marco,

The heater coil is floating with respect to the B+ output, so it floats along with it. In that respect there is no closed circuit with the B+, but why is that relevant anyway?

[turbo]

i was just about to put the 500VDC directly on to the filament to see what it would do.

if there is no closed loop it cannot combine.
unless there is some sort of electrostatic coupling between the windings which can happen at high voltage.
it is the diffrence between two terminals and a closed loop ,and one hot terminal in an open circuit.

that is relevant because Steven says it travels through the coils of the htr transformer and combines with the 5VAC.
from the beginning of the experiment untill now i did not understand what he ment.

Marco.