[TenTec] ten tecs have 100 watts out on carrier??

[wa3fiy at radioadv.com]

Jerry did answer the question very well but let's try another approach.

Using a 100 watt max power rig as our base, no SWR foldback, no circuit breaker tripping, 
the rig can produce a max of 100 watts to a 50 load.  That is 70.7 volts of RF to the 50 ohms.  
That's (70.7 X 70.7) / 50 or 500/50 or 100 watts.   On CW that's fine but what about AM?  On 
AM we must reduce the carrier to 1/2 voltage or 35.35 volts.  Using P=E(squared) divided by 
R, that is 35.35 X35.35 = 1,250.  1,250 divided by 50 ohms = 25 watts.  So the carrier power 
is as Jerry stated, 25% of the max power available.  On AM modulation, the carrier voltage 
swings from the 35.35 volts with no modulation to 0 to 70.7 volts under full modulation.  
Hence, the instantaneous power varies from 0 watts to 100 watts under modulation.  I have 
noted some of the import rigs rate AM carrier at 40 watts out.  Don't know how they do that 
without creating clipping under full modulation.  I guess maybe they do not allow 100% 
modulation.  Anyone know for sure?


73,

-Lee-
WA3FIY


On 30 Sep 2007 at 16:59, john ferro wrote:

> 
> actually you have not helped me out - you still have not answered the question - whats the difference between an am carrier and cw carrier? if it's the same as some people say why on a japanese radio the am carrier is only 25 to 50 watts (depending on the radio) when the mic is keyed vs. 100 watts on the same jap radio cw mode keyed down - all assuming swr is 1? i understand the swr fold back issue.> From: OTAKEBI at aol.com> Date: Sun, 30 Sep 2007 16:39:52 -0400> To: tentec at contesting.com> Subject: Re: [TenTec] ten tecs have 100 watts out on carrier??> > Yes, Mike.> Now we know what was going on once he explained it a little better.> I had a TS 180s that at had to see a perfect, flat, SWR to put out full > output.> Like Ten Tecs better.> Glad we were able to help him.> Dan/N4VET> > > > ************************************** See what's new at http://www.aol.com> _______________________________________________> TenTec mailing list> TenTec at contesting.com> http://lists.contesting
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