Colin,
I think you're correct, and I don't think you've missed anything. In
my situation, the antenna has a higher than 10 to 1 SWR, and only my
external tuner will correct that. The internal tuner works fine in
the bands where the SWR is lower.
Steve
On Friday 8/5/05 11:35 Colin McDonald wrote:
>Yeh...the 570 says the same that if you have greater then 10 to 1, the
>internal tuner will not tune the antenna...which would lead me to believe
>that the tuner can tune from a 10 to 1 to a reasonable match of 3 to 1 or
>less?
>Is that right or am i missing something there?
>I know it probably wouldn't tune from something as high as a 10 to 1 down to
>a 1 to 1 match, but i think it says something about it being able to tune
>down to at least a 3 to 1...which is where i think the confusion came from
>regarding the 3 to 1 matching.
>Its not that it wont tune anything higher then a 3 to 1, but more that it
>wont tune below a 3 to 1 if the match is extremely high.
>How else would i be able to tune a 20 metre inverted V half wave to work on
>75/80 meters?
>I am sure on 3.7 MHZ the natural match has to be greater then 3 to 1...and
>the 570 is using the relay type tuning.
>Again, correct me if i am wrong, that is just the way i understood it from
>the manual.
>
>73
>Colin, V A6BKX
>
>----- Original Message -----
>From: "Steve Dresser" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Friday, August 05, 2005 8:43 AM
>Subject: Re: Ts 480 and power supply
>
>
> > Colin,
> >
> > The 480 manual says that you'll have trouble if your SWR is greater
> > than 10 to 1. I don't know for certain, but I suspect most internal
> > tuners have less tolleranc3e for high SWR than some of the older
> > external tuners because they don't use tuning capacitors. That's how
> > they can be crammed into such small radios. Those tuning capacitors
> > take up lots of space, especially if you want them to handle higher power.
> >
> > Steve
> >
> > On Friday 8/5/05 00:40 Colin McDonald wrote:
> > >kenwood tuners in general? as in the internal auto tuners?
> > >that cant be right, unless that just applies to the TS480...i tune up
>with
> > >no less then a 6 to 1 match quite regularly...perhaps not wizely, but i
>do
> > >it to get out.
> > >73
> > >Colin, V A6BKX
> > >----- Original Message -----
> > >From: "Anthony Vece" <[log in to unmask]>
> > >To: <[log in to unmask]>
> > >Sent: Thursday, August 04, 2005 8:58 PM
> > >Subject: Re: Ts 480 and power supply
> > >
> > >
> > > > Hi Steve;
> > > >
> > > > I understand from KENWOOD themselves that there tuners are not made
> > > > to tune anything above 1.3/1 match.
> > > >
> > > > 73 De Anthony w2ajv
> > > > [log in to unmask]
> > > >
> > > > On 2 Aug 2005, at 10:41, Steve Dresser wrote:
> > > >
> > > > > Butch,
> > > > >
> > > > > To me, the 200-watt unit makes sense only if you run it mobile all
> > > > > the time. I had the same thoughts about the tuner, although I
>almost
> > > > > never use it because I've found that my Icom ATS500 works much
>better
> > > > > than the 480's internal tuner. In fact, there are some bands where
>I
> > > > > can't even tune up with the internal tuner, but the external tuner
> > > > > brings the SWR right down to 1/1.
> > > > >
> > > > > Steve
> > > > >
> > > > > On Monday 8/1/05 18:53 Butch Bussen wrote:
> > > > >
> > > > >> Speaking of the 480. If the voltage between both pulgs isn't
> > > > >> within a
> > > > >> very small ammount, the rig won't transmit. Personally, I can't
> > > > >> see the
> > > > >> 200 watt version, you're talking an increase of 3 db or a half an
> > > > >> s unit.
> > > > >> I'd much rather have the tuner.
> > > > >> 73s
> > > > >> Butch Bussen
> > > > >> wa0vjr
> > > > >
> > > >
> >
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