[Elecraft] Class - A operatiom (was K3 #441 received)

[Tom Childers, N5GE]

On Wed, 20 Feb 2008 08:28:13 -0800 (PST), Lee Butler wrote:

>Augie's report on on Mr. Sherwood's remarks were quite interesting.  The last remark concerning poor transmit specifications interested me.  
>
>>From my days in Vo-Tech Electronics in High School some 40 years ago....isn't Class A not very efficient?  You can get more power out of class AB1 or AB2 but you have to keep to the linear portion of the curve to avoid distortion.  I guess what is happening is that the rigs are not keeping to the linear portion of the curve because of over drive by the operator or by the circuitry to compensate for something or other.  A linear amp has to operated in the linear part of the curve. Right?  So, what are these rigs doing?
>
>If I remember correctly, isn't Yaesu's FT9000 or FT1000XXX has a button that allows Class-A operation?

The FT-1000MP rigs have Class A capability.  I always excited my Alpha 87A in
that setting in both CW and SSB.  I think the newer high end Yaesu rigs have it
too.
  
>
>What rigs run Class A?  
>
>How does that sound on the RX end and what do you give up on the TX end?  Power out?  
>
>Interesting discussion with Mr. Sherwood's Data and comments.
>
>Lee - K0WA
>
> 
>
>In our day and age it seems that Common Sense is in short supply.  If you don't have any Common Sense - get some Common Sense and use it.  If you can't find any Common Sense, ask for help from somebody who has some Common Sense.  Is Common Sense divine?
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Tom, N5GE - SWOT 3537 - Grid EM12jq

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