[Johnson] A question from A New BA operator.

Thu, 21 Mar 2002 23:21:15 -0500

There's no problem doing what many of you suggest with the valiant or Viking
I & II or any other rig as long as you are only operating CW. That is what
EFJ was thinking about when they recommended reducing power for novices.
When operating AM with plate modulation as these rigs are designed for, you
should always load to normal power input. This is to insure that the
modulator will be matched to the transmitter.

73,

Ed, K�BKA
----- Original Message -----
From: "Yves Dussault" <[email protected]>
To: <[email protected]>
Sent: Thursday, March 21, 2002 10:14 AM
Subject: Re: [Johnson] A question from A New BA operator.

>
>
> Tuning for reduced power in the VIKING II:
>
> In the instruction manual of the Viking II, we find the following, on page
9:
>
> NOVICE OPERATION
> "Current FCC regulations require that operators with Novice Class Amateur
> Operator's Licenses limit theit final amplifier input to 75 watts.  This
> may be accomplished with good efficiency by reducing output coupling.
>
> In the "plt" position of the meter switch, the meter indicates 6146
cathode
> current, the sum of plate and screen grid currents.  With 6146 grid
current
> at 6 ma. and the amplifier resonant and drawing 140 ma.  cathode
> current,  the screen current will be 30 ma.  and the net plate current
will
> be 110 ma.  This is slightly less than 75 watts input with 660 volts plate
> voltage.  Amplifier output can exceed 55 watts under these conditions."
>
> I guess that a similar procedure can be applied to the Valiant?
>
> 73's to all.
>
> VE2ATD
> Yves Dussault
> Laval, Quebec.
>
>
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