Inductance used in Push-Pull Output transformer for LTspice Modeling

[tanker135]

Since inductance varied with voltage and frequency what Primary and secondary inductance should be used in LTspice modeling for tube amplifier?
I saw some Hammond model specified Primary and secondary inductance at 50/60Hz and some are at 1Khz.
My output tranny (not Hammond) Primary inductance is specified as follow at 1mW : 160-350 H at 50Hz. and 125 Ohms for Primary P-P resistance. That's all parameters I have.
Not really sure what Inductance value I should use for modeling. Also at what frequency and voltage would be more optimal in modeling output transformer inductance?

Thanks in advance.

 

[lcsaszar]

I am also interested in this. I opened a thread:

https://www.diyaudio.com/community/...rmer-measurements-please-help-explain.383354/

My conclusion is that the inductance is not very important, as long as it is reasonably high. More important is the leakage inductance (=tight coupling) and stray capacitance.

 

[Elvee]

LTspice has the provision to model non-linearity/saturation effects in the core, which is important for large-signal, low-frequency operation. I haven't used the feature for quite a long time and I couldn't guide you into it, but there are certainly tutorials available on the net

 

[jackinnj]

The Hammond datasheets give you baseline primary inductance and DC resistance specs -- you can start from there....work back to the secondary inductance from the formula.