That is what happens with heaters. The
resistance is much lower at room temperature than at (red-hot)
operating temperature. The heater voltage is 12.6 V or 6.3 V,
not 6.0 V.
On 2025-02-18 18:57, David Schultz via
groups.io wrote:
The
comments in the 12AU7heater model indicate that it works with both
DC and AC so I gave that a whirl. 6VRMS (4.2V peak) actually gives
time varying results. Current starts at a little over 500mA peak
but settles down to around 200mA peak after a second or so.
--
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