Electronics > Beginners
Bogus parts from Reputable Dealer?
Jwillis:
--- Quote from: exe on February 19, 2020, 09:32:23 am ---In a linear application the gate resistor becomes a part of feedback loop and need to be chosen wisely, imho. Although, I can't say if too big value can be a problem or not. Probably not as it seems to be pushing "first pole" to lower frequencies (as together with gate capacitance it makes a low-pass filter), making the whole loop more stable, but I advice use a simulation to confirm this.
--- End quote ---
The whole circuit has been changed from the original design anyway.https://www.eevblog.com/forum/beginners/protection-for-electronic-load-circuit/. The 10K was replaced with 10 Ohm. But it had no effect on the performance of the circuit . The whole problem turned out to be faulty op amps.
Since replacing the components the circuit has been functioning properly at 500 Watts for extended periods of time so far.
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