To: | <amps@contesting.com> |
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Subject: | [AMPS] IMD |
From: | W8JI@contesting.com (Tom Rauch) |
Date: | Tue, 18 Sep 2001 10:28:40 -0400 |
> >>Reducing drive power from an exciter does not always make things > >better. Quite often it actually makes things worse. > For example, the ARRL expanded test report clearly shows the 1000MP is > very clean on output until you reach 25 watts and below. > > Bill K1XT That's right, my IC-751's get worse at low power. I find that a common trait in systems with solid state amplifiers. In the case of the 751A, changed driver transistors and revising the bias system in the PA section cured the problems. I also see contestors (and others) are bumping up the internal power limit controls, like CB'ers do. That is really bad news, and so is use of audio equalizers to add bass response. 73, Tom W8JI W8JI@contesting.com -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com |
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