To: | <tentec@contesting.com> |
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Subject: | [TenTec] Re: QSK Problems |
From: | geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer) |
Date: | Wed, 28 Nov 2001 00:31:39 -0600 |
Not likely that the NE-2 will do much protection. It will probably explode at less than 100 ma. current while the PA tube flash over is likely to be a few amps. A LARGE 50 volt zener diode may be more effective, but it may also protect the transistor by failing shorted. A 50 volt or so rated MOV will probably be better protection than the zener diode. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson. Reproduction by permission only. |
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