[TenTec] Tuner and amp

[James C. Owen, III]

Hi John,
   Yes I am talking about GG amplifiers. Most take 75-100W drive
for full output. If your Ameritron requires only 40W drive then
that amp is on the verge of being illegal by FCC type acceptance
standards. These standards have been proposed to be changed but
to my knowledge it hasn't happened yet. FCC  97.317 states to be
type accepted the amp must not be capable of being driven to full
designed power with less than 40 watts.  Not capable of
amplifying the RF driving signal by more than 15DB unless the amp
has a designed power of less than 1.5 KW.  To me this means that
a grid driven amplifier on the market today is not legal since
most of them would require much less than 40 watts. 
   I'll be glad when this requirement is deleted from the
regulations.  It was put in to prevent CB amplifiers but it was a
failure as only the hams were affected. CB'er seemed to just use
illegal amplifiers and get by with it for the most part.
73 Jim K4CGY

--- John Nason / NA9U <na9u at arrl.net> wrote:

> 40 watts is all I need to drive my Ameritron amp to
> full power.  I think the Ten Tec amps take more input
> power by design. 
> 
> 73, 
> John NA9U 
> 
> --- Duane A Calvin <ac5aa at juno.com> wrote:
> 
> > 50-75W input!  Yikes!  You must be describing a
> > grounded grid 3-500Z amp,
> > because my Alpha 99 would be "tuning up" at about 3
> > KW, I think, with
> > that much input power!   
> > 
> >         73,  Duane
> > 
> > 
> > On Fri, 24 Feb 2006 08:22:12 -0800 (PST) "James C.
> > Owen, III"
> > <k4cgy_list at yahoo.com> writes:
> > > Hi John,
> > >    You don't need an ALC line from any linear when
> > using a
> > > ten-tec transceiver. Since the ALC adjustment on
> > the TT sets the
> > > maximum power that the transceiver will transmitt.
> > Just tune up
> > > the linear as normal with maybe 50-75 watts and
> > then adjust the
> > > ALC adjustment until the power output goes to
> > maximum and leave
> > > it there. At that point the linear has all the
> > drive it needs and
> > > the transceiver  won't transmitt at a higher
> > level.
> > > 73 Jim K4CGY
> > > 
> > > --- John Nason / NA9U <na9u at arrl.net> wrote:
> > > 
> > > >
> > > > Speaking of amps, I never found a way to feed
> > the ALC
> > > > line back from the amp to the O2.  Is this
> > unecessary
> > > > on the O2?  Do I keep missing it in the manual? 
> > 
> > > > 
> > > > 73,
> > > > John NA9U
> > > > 
> > > >
> > > 
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> > > 
> > 
> > 
> > Duane Calvin, AC5AA
> > Austin, Texas
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> > 
> 
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