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That model is probably for a gas-filled lamp, but a pilot light is probably a vacuum lamp. That could make quite a difference. I'm surprised that a 6 V 10mA lamp is still made. Do you really need low distortion? Diode clipping can get down to about 1% with careful design. A JFET as a voltage-controlled resistor (VCR) can do better, but only for a one-off, because the FETs vary too much unless you use a very costly part designed and selected as a VCR.

I’m trying to adapt and use the model in LampModel.zip, uploaded by analogspiceman last September.

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The test circuit supplied works fine for a 120VAC lamp.

I want to adapt it to a small pilot lamp, as a stabilizer for a Wein network oscillator.

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There are a number of parameters defined in the model, but except foe ambient temperature, not well explained.

I commented the .param block and passed them externally, and that works exactly the same, as expected.

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Now, can anyone suggest what needs “tuning”, to get? about 600 ohms at 10mA, after warm-up?

Ka, ambient temp (Kelvin) is easy.

Kc looks like design voltage (120RMS), but doesn’t really act like it; left alone.

Kf seems to be a heat transfer coefficient, maybe good for warmup timing, but slightly changes stable resistance.

CTf is a coupling factor from Tambient to Tfilament, sets warmup timing; left alone.

RTf is filament resistance, but changing that parameter makes only a very small difference to the preset, ~150 ohms.

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Thanks,

Dave