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Old 18th October 2004, 06:21 PM   #1
B.I.G is offline B.I.G  Romania
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Default N-Channel no bias problem

I`ve built Holton`s N-Channel and the bias pot doesn`t work i have 0V across the drain/source resistors !!

the pot is multiturn 4.7K and it is ok!

The amp plays sound and hass severe crossover distorsion !
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Old 18th October 2004, 06:58 PM   #2
B.I.G is offline B.I.G  Romania
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i`ve solved the problem but now have another one ... the previous one was that the lm317 regulator wasn`t mounted correctly but now i have Bias and it starts from a low value and increasses to about ... i really don`t know .... the most i`ve seen 150mv on my 0.22R resistors ... it should be about 18mv it doesn`t matter how i turn the bias pot it still increasses
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Old 18th October 2004, 06:59 PM   #3
B.I.G is offline B.I.G  Romania
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PS: it increasses very fast in about 10sec it getts to about 150mv
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