[Elecraft] T1 tuner issue

[Don Wilhelm]

Kurt,

It all depends on the feedline length (in electrical wavelengths).  If your
feedline is anywhere near a multiple of a half wavelength at 20 meters, that
behavior is not unusual.  The T1 tuner (and most similar tuners) do not work
well if the impedance presented at the shack end of the feedline is quite
high.  If you add or subtract a bit of feedline length (1/8 wavelength at a
time is my suggestion), you will likely see better results.

I will go into all the reasons why should you ask, but try changing the
feedline length and see if it improves things.

73,
Don W3FPR

> -----Original Message-----
>
> Hello All,
>
> I just got my SW-20+ working, and I ran into an
> antenna question.  Currently, I don't have a 20 meter
> antenna, so I thought I would try to use my 40 meter
> dipole with it and just use my  Elecraft T1 to tune it
> to 20m.
>
> It it didn't work too well...I got an SWR around 2.5.
> Is this to be expected, or could there be an issue
> with the T1?  The T1 sure sounds like it is working
> hard to get to the 2.5 (relays are busy).  My antenna
> ignorance is probably showing, but since 20 is a
> direct multiple of 40, I thought the T1 wouldn't have
> a problem matching.
>
> So I guess my question is:  Is something wrong with my
> T1, or do I just need to put up a 20meter antenna?
>
> 72,
>
> Kurt - ae6uj
>
>