Well said, you will be well on your way to passing that exam.


On 16 May 2008 at 9:30, Shaun Oliver wrote:

> well,, firstly, I'm waiting for vision australia to transcribe the 
> manual into daisy format, so don't know if the 201 has a processor on board.
> and I too, would have thought that running your tubes at a lower voltage 
> would have some kind of effect on them. I'm just not sure it's a good 
> one. because I suspect that the tuning procedure is as much matching the 
> radio's impedance to that of your feed line as it is to get the maximum 
> efficiency out of your tubes.
> 
> Shaun
> web sites:
> http://www.myspace.com/blindmanshaunoliver
> http://blindman.homelinux.org/~blindman/
> skype: brailledude
> 
> 
> On 16/05/2008 1:48 AM, the old scribe known as Colin McDonald was able 
> to impart this pearl of wisdom:
> > hmmm, you should be able to adjust your plate control to reduce power
> > without drastically effecting the tubes longevity.
> > Also, does the 201 not have a processer onboard?  If so, you can use the
> > mike gain to reduce power, and the processer to insure maximum output at
> > that level without having the inherent problems that low mic gain will
> > cause.
> > If no processer, then some sort of combination between lowered mike gain and
> > adjusting the plate or load controls should help to get your power down to
> > the "legal" limit for your license class.
> > Of course, the load and plate also effect the receiver so you'll have to
> > figure some workable combination out there.
> > Also I can't quite understand how running tubes at a fraction of their
> > output capability could actually reduce their longevity.
> > in the audio world, running tubes at lower voltages and reduced output
> > actually makes them last longer.
> > regards
> > Colin
> > ----- Original Message ----- 
> > From: "Shaun Oliver" <[log in to unmask]>
> > To: <[log in to unmask]>
> > Sent: Thursday, May 15, 2008 7:33 AM
> > Subject: power mods for tube rigs.
> > 
> > 
> >> Hi guys, I'm just that much closer to gaining my license. sent away for
> >> my foundation license manual today. now. the issue is, I wanna run my
> >> radio at 10w and simply backing the mic gain off won't cut it.
> >> is there a mod I could have a qualified tech do to reduce the output on
> >> my old yaesu ft-201? if so, what's involved?
> >> thanks in advance guys.
> >>
> >> -- 
> >> Shaun
> >> web sites:
> >> http://www.myspace.com/blindmanshaunoliver
> >> http://blindman.homelinux.org/~blindman/
> >> skype: brailledude
> >>
> >>
> >>
> >> -- 
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> >>
> > 
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> > 
> > 
>