[1000mp] AMP Question

[Leslie Hittner]

Sending Morse Code by on-off keying is amplitude modulation pure
and simple.

-Les, K0BAD

----- Original Message ----- 
From: "Tom Childers, N5GE" <n5ge at n5ge.com>
To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
Sent: Friday, May 04, 2007 9:35 AM
Subject: Re: [1000mp] AMP Question


On Thu, 3 May 2007 22:28:51 -0500, you wrote:

There is no modulation in a CW carrier.  It is pure RF.
Modulation is applied
to a carrier to transmit varying pitch so speech can be
transmitted.  Only MCW
is modulated.


>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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>>>
>>
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>
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Tom, N5GE

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