Hi...I have a question. Been working on a Yorkville unit....a 100KW and when you turn the power off you get this nasty click from the speaker........When you turn it on, it is fine....only happens when you turn it off....The only thing in the ckt is a JFET and a tap off the power supply to supply -18V to the gate...The Fet in question, (a 2N5638), has a turn on resistance of approx 30 ohms. The resistance is there in both directions....just like a shorted junction.So I sourced a replacement...a NTE467....Same problem...so I took a couple of new ones and tested them with my meter...I discovered that you can't get the gate to turn on and off...it is always on and therefore shows this low resistance reading between the drain and the source. Is this defective, or is this a characteristic of this particular device?? The store that I purchased these from only sell parts..they don't know very much about the specs and such...Has anybody else ran into a problem like this??
Cheers,
Bernie
Cheers,
Bernie
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