Dan:
Please take a look at the web site attached. You will get the straight
information there.
Attempting to seriously under load an amplifier has serious consequences,
don't do it.
<goog_1220963974199>www.kk5dr.com/*Tune*up.htm<http://www.kk5dr.com/Tuneup.htm>
You will learn all you need to do on the web site. I have 2 Ameritron amps
AL 80 and AL1200; I use the methods on the web site.
Good tuning...
Dave K3FT
www.kk5dr.com/*Tune*up.htm
On Mon, Sep 8, 2008 at 10:38 PM, <OTAKEBI@aol.com> wrote:
> I have an Ameritron AL-811 Amplifier and before I blow it up I have a
> question.
> The instruction manual is not very clear on this issue.
> As to the load control, the book says to set it at 4 1/2 at 4.0 MHz.
> I find that at 3.983, after I adjust the plate for maximum output I end up
> with the plate control at 5 which is very close to the recommended starting
> point of 5 1/2.
> However, I get more output if I turn the Load control down to about 1 with
> the same input power from the exciter.
> The question is should I leave the load control at 4 and 1/2 or run it down
> to 1?
> I like to run the amplifier at a maximum of 400 watts CW so as not to push
> things.
> I can get to that power level easy either way on the load control setting
> and still be within the 200 ma grid current maximum recommend by
> Ameritron.
> The only difference I notice is that a load control setting of 1 gets me to
> 400 watts with less exciter power.
> Bottom line is I need a lesson on how to properly tune the amp and proper
> settings of the plate and load controls.
> This may be a dumb question to some but I fell better safe and proper use.
> Thanks,
> Dan/N4VET
>
>
>
>
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