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hi, i am finish to build my ATU 100 kit,, my antenna is a inv V dipole, tuned at 7100 khz. i can reach 1:1 in the 60 meter band, but cant reach SWR low than 7:1 in 20 meter band. i check continuity in various points, i try fast test and full test. i check the relays have continuity to capacitors and toroids, i check the relays have power. i understand that my antenna has 9 SWR in 14 mhz, maybe this SWR is too high to be matched?

thanks for read?

73 de CE2PEY

Hi.?
No, you have to use traps if you wanna use it on 14 MHz. Too high impedance.

so the atu cant handle the? impedance mismatch between my dipole and the freq i try to use, thanks for the response. i was thinking that i have made some mistake when i build my kit. but in 60 m the unit tunes perfectly. also there is any way to check any fault in my building work, i used fast test and simply test, but i dont know how detect potential errors in my build. again thanks for you help.?

Hi.
Very high impedance which you have on 14 MHz meaning very high voltage on the tuner elements, you can burn it easy. Installing traps is the best solution .