Transistor help

From: Allison J Parent <>
Date: Thu Mar 18 18:37:06 1999

<types. The replacement transistor
<that NTE had didn't seem to have enough gain. In order
<for a flyback switcher to work, the edges have to be sharp.
<I currently have a 2N4401 in there but it may have too much gain
<or not be able to handle the higher reverse voltage on the

the 4401 is a good match but the NTE part should work. The transistor
should be able to withstand 60V and have a moderate beta. I'd try a
2n2219 or maybe a 3904. The cicut is not the best design and tended
to flake out if the load was too high.

Received on Thu Mar 18 1999 - 18:37:06 GMT

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