[1000mp] AMP Question

[Win]

Not to draw this out, but I have to wonder if this is true in CW mode. 
Modulation is either 100% or nothing.  It would seem that the input Z would 
remain the same and not cycle the tuner.  Am I off base?

Win, WoLZ



----- Original Message ----- 
From: "Garry Shapiro" <garry at ni6t.com>
To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
Sent: Thursday, May 03, 2007 8:05 PM
Subject: Re: [1000mp] AMP Question


> The impedance is nonlinear--and so voltage and current do not have a 
> constant relationship.
>
> Rob Atkinson wrote:
>> Hi,
>>
>> I guess I don't understand how the Z of a load can change with the power 
>> delivered to it unless the components affecting the Z are underated for 
>> the power.   maybe i'm missing something?  sorry.
>>
>> 73
>>
>> rob / k5uj
>>
>>
>> On Thursday, May 3, 2007, at 10:09  AM, Rod Elliott wrote:
>>
>>> Dick...
>>>
>>> I use a Mk5 Field to drive an AL-1200. No problems... works great.
>>>
>>> In my experience the SWR presented to the Field by the amp's input is 
>>> always well below 2:1, even if the output of the amp is not perfectly 
>>> matched. The Field has no problem with that.
>>>
>>> One precaution... do NOT use the Field's internal antenna tuner when 
>>> driving the amp. (The amp's input impedance varies with drive level... 
>>> you don't want the Field's tuner to strip its gears trying to follow 
>>> your voice! )
>>>
>>> 73
>>> Rod VE3UW
>>>
>>
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