Lloyd:

Sorry about the misplaced decimal point in the frequencies mentioned.  Guess 
that is why I was not a math major in college!  (grin)

Anyway, I appreciate your observations here.

I still wish I could find the true resonance point of the antenna.

From what others have said, most of the action on 160 is indeed between 
1.800 and 1.900, except perhaps in some contests, so maybe I'm ok, 
considering the nature of the antenna and what one can reasonably expect.

I'll keep working at things here and keep everyone updated.

I truly appreciate everyone's tolerating this discussion.  I am learning a 
lot.

73 from Tom Behler: KB8TYJ

----- Original Message ----- 
From: "Lloyd Rasmussen" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, November 15, 2011 11:06 PM
Subject: Re: TS590 internal watt and SWR meter VS LDG TW1


> SWR meters often become inaccurate when the SWR is high.  An infinite SWR
> would mean that the forward and reflected power are equal, at least on an
> ideal meter.  It would be good if you could tell whether your internal or
> external tuners were adequately compensating for the high SWR at the band
> edges.  Remember, your resonant frequency is 1.830 MHz, not 18.300.  It
> sounds like things should be reasonably safe from 1.8 to 1.9 MHz, at 
> least.
> 73,
> Lloyd Rasmussen, W3IUU, Wheaton, Maryland
> Home:  http://lras.home.sprynet.com
> Work:  http://www.loc.gov/nls
>
>> -----Original Message-----
>> From: For blind ham radio operators 
>> [mailto:[log in to unmask]]
>> On Behalf Of Tom Behler
>> Sent: Tuesday, November 15, 2011 6:32 PM
>> To: [log in to unmask]
>> Subject: TS590 internal watt and SWR meter VS LDG TW1
>>
>> Hi, all.
>>
>> As I have been working on tuning my newly-installed 160 meter half sloper
>> antenna, I have noticed something interesting, when comparing the SWR's 
>> on
>> 160 meters that are given to me by the TS590 internal meter, and the LDG
>> TW1
>> talking watt meter.
>>
>> What I have noticed is that the TS590's meter gives me a 5 to 1 SWR at 
>> the
>> top and bottom of the band, with the lowest SWR at about 2.0 to 1 around
>> 18.300 or 18.400 MHZ.  Also, the TS590's internal auto-tuner seems to 
>> tune
>> the antenna from the top to the bottom of the band with no problem.
>>
>> Interestingly, though, my TW1 starts out ok with farily similar readings
>> to
>> those given by the TS590's internal meter, but as I get to the top of the
>> band, its SWR readings shoot up to about 12 or 13 to 1, in comparison to
>> the
>> 5 to 1 given by the TS590's internal meter.  All readings are taken with
>> the
>> TS590 auto-tuner in the off position, and with an output power of
>> approximately 30 watts.
>>
>> Would anyone have an explanation for these variations I am seeing?
>>
>> I do not seem to notice this much of a variation on other bands.
>>
>> As a side note, due to the fact that the MFJ 259B analyzer I am borrowing
>> gets confused because of the A M broadcast station in my area, I honestly
>> don't know what the resonant frequency of the antenna is, but I think I 
>> am
>> reasonable in saying that it's probably not too far from 18.300 or 18.400
>> MHZ.
>>
>> 73 from Tom Behler:  KB8TYJ
>