[Kenwood] ts 520

[peter markavage]

>Quote:  "Remember, you can tune this rig up into just about ANY
antenna....as long as you get a dip in the plate control, you are fine.  
I never use an
> antenna tuner with this rig as the pi network in the rig is a built in
tuner...AS
> LONG AS YOU GET A DIP IN THE PLATE CONTROL, YOU ARE OK    DONT SWEAT
THE SWR IF YOU GET A DIP.."


The pi network can provide resonance of the final. It does not replace an
antenna tuner. You can, in many cases, find a dip at the frequency of
interest, and still have poor transfer of power to the antenna due to
high reactive elements of the feed line, antenna cut to the wrong
frequency, antenna failure, antenna reactive components, etc. Because you
get a "dip" does not guarantee you'll get maximum transfer of power to
the antenna. "don't sweat the SWR if you get a dip" is false security.

Pete, wa2cwa

On Tue, 19 Apr 2005 08:28:15 -0400 "Dave Edwards" <kd2e at comcast.net>
writes:
> If you don't have the manual, you really gotta check out an old 
> handbook to
> get an idea of what you're doing when tuning. The wrong combo of all 
> them
> knobs can trash that rig fast. Fortunately, the 6146's are a bit 
> more
> forgiving than if you were learning on an old Swan or Drake rig.
> ....Dave
> ----- Original Message ----- 
> From: "G. Doughty" <ki4bbl at cox.net>
> To: <kenwood at mailman.qth.net>
> Sent: Tuesday, April 19, 2005 3:34 AM
> Subject: RE: [Kenwood] ts 520
> 
> 
> > This is fun. . .just so long as I don't blow up the rig  HI HI
> >
> > What constitutes a "dip".  I do get a slight deflection . . . 
> very
> > slight.  Is dipping the plate always done to zero if possible 
> because I
> > am nowhere near zero but the needle does move.  Does that count?
> >
> > G. Doughty
> >
> >
> > Mark wrote:
> > >
> > >Follow these steps EXACTLY.
> > >
> > >
> > >1) Meter in ALC...mode in tune....send......peak the drive.(you 
> may
> > have
> > >to
> > >adjust carrier to keep it on the scale)
> > >
> > >2) meter in  ip......mode cw......send.......dip plate control.   
> If
> > not
> > >enough current showing, or too much you need to adjust carrier 
> now to
> > >keep
> > >it around 200 milliamps.  (you can do this sending  with the mic, 
> or by
> >
> > >putting rig
> > >in vox and using key......if key is plugged in, you must use 
> key.)
> > >
> > >
> > >3)  meter in rf......mode cw......send(same as above re
> > >key)..........alternately peak load and plate control....plate 
> control
> > >last.
> > >
> > >
> > >4) switch meter to ip, and check plate currrent...adjust to   200 
> mils
> > >or so
> > >with carrier control.
> > >
> > >
> > >
> > >All done. Very easy, but Kenwood manuals for 520/599/820/830/530/ 
>  all
> > >had
> > >it screwed up.
> > >
> > >
> > >
> > >Remember, you can tune this rig up into just about ANY 
> antenna....as
> > >long as
> > >you get a dip in the plate control, you are fine.   I never use 
> an
> > >antenna
> > >tuner with this rig as the pi network in the rig is a built in
> > >tuner...AS
> > >LONG AS YOU GET A DIP IN THE PLATE CONTROL, YOU ARE OK    DONT 
> SWEAT
> > THE
> > >SWR
> > >IF YOU GET A DIP..
> > >
> > >Let me know how it tunes, now, ok?
> > >
> > >Mark
> > >K8VF