Take them apart, recut the elements to 10M and reassemble with 10M spacing.
Lots of luck

"James Barrett" wrote in message
. ..
Can a 20 meter yagi be tuned down to 10 meters? can a 40 meter yagi be
tuned down to 10?

Thanks,

On Sep 7, 1:55*pm, "Rollie" wrote:
Take them apart, recut the elements to 10M and reassemble with 10M spacing.
Lots of luck

"James Barrett" wrote in message

. ..



Can a 20 meter yagi be tuned down to 10 meters? can a 40 meter yagi be
tuned down to 10?

Thanks,- Hide quoted text -

- Show quoted text -

And don't forget that a new gamma match must be calculated. See
http://www.ve3sqb.com/ and search "gamma" on the page for his antenna
design program "Gamma".

wrote:
On Sep 7, 1:55 pm, "Rollie" wrote:
Take them apart, recut the elements to 10M and reassemble with 10M spacing.
Lots of luck

"James Barrett" wrote in message

. ..



Can a 20 meter yagi be tuned down to 10 meters? can a 40 meter yagi be
tuned down to 10?
Thanks,- Hide quoted text -
- Show quoted text -

And don't forget that a new gamma match must be calculated. See
http://www.ve3sqb.com/ and search "gamma" on the page for his antenna
design program "Gamma".

Yeah, most of have explored those "ballpark" equations/formulas for
gamma matches. I even translated one from the basic language to C.

In the end, it is "cut and match."

Regards,
JS

--
It is like a nightmare where the public servants are the people which
the police are supposed to protect us from!

Can a 20 or 40 meter antenna be used to transmit on different bands?
Yes. It depends on how you mean that, though. Either can be 'cut
down' for use on higher frequencies, or 'trapped' and used on lower
ones (so some ridiculous point). If you mean used as a directional
antenna as they work on their design bands, then no, they won't work
that way without that physical modification. There may be some
'directionality' to it, but not like they are supposed to be (that
make sense?). It can work, but not 'well'.
- 'Doc

On Mon, 8 Sep 2008 08:37:27 -0700 (PDT), wrote:

Can a 20 or 40 meter antenna be used to transmit on different bands?
Yes. It depends on how you mean that, though. Either can be 'cut
down' for use on higher frequencies, or 'trapped' and used on lower
ones (so some ridiculous point). If you mean used as a directional
antenna as they work on their design bands, then no, they won't work
that way without that physical modification. There may be some
'directionality' to it, but not like they are supposed to be (that
make sense?). It can work, but not 'well'.
- 'Doc

I guess the old Mosely tribanders were before your time. They worked
well and on 40, 20 and 10 and other antennas on 80, 40, and 20.