[1000mp] Amps & IMD Low power

Sun, 14 Jul 2002 20:57:14 -0400

Interesting. So I should run my MP at full power into an attenuator then
into my QRO HF-2500DX?
;-)
Norm
----- Original Message -----
From: "John" <[email protected]>
To: <[email protected]>
Sent: Sunday, July 14, 2002 2:34 PM
Subject: Re: [1000mp] Amps & IMD Low power


> Hi all
> The IMD distortion on 12 volt final radio's goes UP as power goes down.
The
> MP with 2SC2879 is no exception, It is at it's cleanest when running 100
> watts & ALC is at it's lowest... also by Turning the power down increase's
> ALC voltage , which cause's IMD modulation on the controlling FET IF
amp...
> The radio's that do better when the power goes down are the 28 volt or
> higher final rigs. Turning the rig down to 50 watts or less is the worst
> thing you can do .... A lot of hams don't know this !!! ... Why do you
think
> Yaesu has the MK5 & Field with a class A low power mode ???
>
> John
>
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