[Boatanchors] Using a SG-230 tuner on AM

[Carl]

Where is this doubled current coming from? There is only one voltage source 
feeding the final and that certainly isnt pulling 2X key down.

I dont see 4X power on a peak reading wattmeter or spectrum analyzer.

Carl
KM1H

----- Original Message ----- 
From: "D C *Mac* Macdonald" <k2gkk at hotmail.com>
To: <rbethman at comcast.net>; <boatanchors at mailman.qth.net>
Sent: Sunday, August 09, 2009 4:15 PM
Subject: Re: [Boatanchors] Using a SG-230 tuner on AM


>
> 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
>
>
>
> ----------------------------------------
>> 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
>>>
>>
>> ______________________________________________________________
>> Boatanchors mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Boatanchors at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html