[Boatanchors] Using a SG-230 tuner on AM

[D C *Mac* Macdonald]

I'm certainly not looking to start a "firefight."
 
HOWEVER, if you will display an unmodulated "carrier" on an
o'scope, then modulate it 100%, the VOLTAGE when amplified
will double.  Since ohms law states that if you double the
voltage you will also double the current.
 
Since P = I x E, 2I x 2E will give you 4P.
 
It's basic Electronics 101.
 
 
73 - Mac, K2GKK/5
Oklahoma City, OK



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> Date: Sun, 9 Aug 2009 16:11:02 -0400
> From: rbethman at comcast.net
> To: boatanchors at mailman.qth.net
> Subject: Re: [Boatanchors] Using a SG-230 tuner on AM
>
> This always starts "some" sort of a firefight.
>
> I can argue either side. The basic reasoning gets down to WHAT
> measurement INSTRUMENTS are being used.
>
> The current 1500W limit is to be measured in PEP. Darn few folks do
> so. They are still using equipment that doesn't get the job done correctly.
>
> The only thing I could remotely suggest is to TRY the tuner on a single
> antenna with a radio of the desired output. Brief duration as I know
> Carl WOULD do.
>
> Then go from there.
>
> I'm going to leave the firefight. Been in to many real ones.
>
> Bob - N0DGN
>
> D C *Mac* Macdonald wrote:
>> At 100% modulation peak, the instantaneous voltage
>> AND current are both double the static values.
>>
>> V^2 times I^2 gives you four times the static power.
>>
>> Current FCC rules allow for 1.5 kW output power.
>> That is why the old kilowatt rigs such as Collins
>> KW-1 and Johnson Desk Kilowatt can now only be run
>> at 375 Watts carrier power.
>>
>> 73 - Mac, K2GKK/5
>> Oklahoma City, OK
>>
>
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