My 6M yagi shows a 5.3:1 SWR as indicated on my K3S on 28.3MHz with the
ATU in Bypass mode. When the KAT3A ATU in the radio resolves a match,
the indicated SWR indicated is 1.1:1 on the radio.
Using the same antenna but using my KAT500 ATU the best SWR resolved is
1.6:1 as indicated on the radio.
Now my antenna analyzer on 28.3 MHz with my 6M yagi connected shows and
SWR of 7.5:1, a Z value of 16.6 ohms, and R value of 7.3 ohms and the X
value of 14.7.
That same antenna on the analyzer at 50.2MHz shows the SWR at 1.2:1, Z
at 39.9, R at 40.0 and Z at 0.0
My conclusion: although the SWR values may be indicating acceptable
values, the 6 meter Yagi operated on 10 meters would make a very lousy
antenna. You'd be much better off to use an 80 meter dipole or better
yet, just a 10 meter dipole.
73
Bob, K4TAX
On 4/11/2020 4:06 PM, John Stengrevics wrote:
My 6 meter antenna reads an SWR of 10:1 on 10 meters. The KAT3A specs suggest
it can tune that degree of mismatch. Is it reasonable to think that the KAT3A
could match my antenna well enough for 10 meters?
Thanks & 73,
John
WA1EAZ
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