[TenTec] Re: ONLY 90 WATTS!

Paul Christensen paulc@mediaone.net
Sat, 21 Mar 1998 12:31:23 -0500

If you're referring to my earlier post, the problem has been corrected
thanks to Troy's suggestion of adjusting R46 (ALC Limiting) on the Omni
Six's 9 MHz Mixer/IF Board.  This board is replaced by Ten-Tec if one elects
a full-option upgrade of their Omni Six to a "Six Plus."

My point was twofold: 1) that the rig easily achieved 100 watts prior to the
upgrade as measured on my Bird 43 wattmeter, notwithstanding a potential 10%
measurement error, and 2) most importantly....that my 3CX1200-based
amplifier requires every watt at the top end of the Omni's range in order to
achieve power anywhere close to *its* specified maximum output rating.   Due
to the amp's amplification factor, the end result is not a mere "0.458 dB,"
or 10-watt difference as you so poignantly suggest.

Keith, sometimes we have to think outside of the box as to what someone's
rationale is for making an inquiry, such as mine.  I also respect your
decision to... "just run the rig, but only after I got the power back down
to a reasonable 5 watts (MAX!!!)."

Remember, this is the Ten-Tec reflector, not the QRP-L reflector.


-Paul, W9AC

-----Original Message-----
From: William K Hibbert <wb2vuo@juno.com>
To: tentec@contesting.com <tentec@contesting.com>
Date: Saturday, March 21, 1998 11:42 AM
Subject: [TenTec] Re: ONLY 90 WATTS!

>Sorry to the majority of the List, but my QRP leanings caught on the edge
>of this thread...
>First off, which is correct, the Bird or the Rig?  I don't recall the
>tolerance on a Bird 43 (I haven't used one since I got out of the Navy),
>but a 10% error is not unusual for a wattmeter.  Could it be that the
>"Majik" 100 watts WAS reached, but not indicated?
>Secondly, let's say that the Bird 43 is right on the money, and the rig
>is ONLY running 90 watts.  What's the net result going to be?  Will one
>miss that elusive 5U4GT or 6L6GB QSO???  If one does, the 10% reduction
>in power won't be the reason.
>Dropping ones power from the Holy Grail of 100 watts to a totally
>unacceptable 90 watts will drop ones signal by an unacceptable 0.458 dB.
>The old "standard" definition of a Decibel indicates that a 1 dB change
>is JUST BARELY DETECTABLE.  A 0.458 dB change is not detectable by ear,
>and is almost impossible to see on the Guess-Meter.  Quibbling over 1/2 a
>Db is like arguing over which Mc Donald's Heart-Bomb is bigger at the
>I would just run the rig, but only after I got the power back down to a
>reasonable 5 watts (MAX!!!)
>72/73, Keith, WB2VUO, 100% QRP from the Depths of the Great Bergen
>"My night light runs more power than my Rig!!!"
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