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Re: [Amps] HF-2000 amp problem?

To: <Paul@PaulFerguson.us>, <amps@contesting.com>
Subject: Re: [Amps] HF-2000 amp problem?
From: "Tom W8JI" <w8ji@w8ji.com>
Date: Sat, 14 Apr 2007 13:06:19 -0400
List-post: <mailto:amps@contesting.com>
> On 20 meters and lower, grid current runs about 150 ma and 
> plate
> current about 500 ma. Plate voltage is about 2,800. Input 
> power runs
> 50 - 75 watts.
>
> On 17 meters and higher, grid current is about 100 - 150 
> ma and plate
> current is 250 - 300 ma. A small increase in input power 
> gives a
> large increase in grid current and little additional 
> output power.
> Input power is 30 - 40 watts.

Although it **might** be some obscure problem, I think it is 
extremely unlikely to be an amplifier problem.

It also sounds to me like you are not loading the amp heavy 
enough.

You probably just need less capacitance on the loading 
capacitor setting.

73 Tom



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