F5 Turbo Builders Thread

Hello Billhurst,

are your thermistors in good contact with the plastic case / surface of the Mosfets? Don't bend them to the metal washers on the Mosfets. The thermistors are well known to easily become damaged on the surfacecoating / colour.

If your new JFets have different values like your original ones - this could also explain a difference in the overall bias.

I would check the thermistors. You describe it as heating up equally , then one side goes / regulates down.
Only an asssumption from me.
And 20mV difference in bias is not so far away.
Cheers
Dirk.