Hi Pedro and Cris,
You can build and use a multiband EFHW (end fed Half wave) without a Tuner.
To get rid of the tuner, all you need is:
- properly cut lengths of wire and add links or Traps (as you have already done), and
- prepare a proprer Feeder: this is what I think you don’t have.
Without the feeder you will always need the Tuner to do the job of reducing the impedance of the Half wave (about 3000 ohm) to 50 ohm of your radio.
Instead of the Tuner, I recommend to prepare an easy all band Feeder for Half wave antennas.
This is a very good feeder:
For QRP power levels you can prepare it with T82-43 toroid or 114-43.
II use that and it works FB.
All you need is the toroid, a 100 or 150 pF capacitor (1000 Volts) and enameled wire (0,5 mm diameter).
See this minimalist feeder I have:
The capacitor is in the back side.The Coax is 3m of RG-174.
Concerning counterpoise, you don’t need any if you use enough coax of about 3 or 4 meter between this feeder and your rig. The braid in the coax performs the function of counterpoise.
IMPORTANT: you have to keep ends of the Half wave up over ground. If installed as Inverted Vee elevate the feed point over ground 1 meter. Sometimes in certain summits you have to move operating position or wire to get better SWR by extending the coax.
Many people use end fed with a tuner, installed at ground level. Try this little feeder and you will reduce a lot of weight!
I’m uising the 10-20-40m since months and never had any SWR problem. And log a lot of stations or even VK S2S when propagation is fine…
EFHW, what else?
Take care 73 de Ignacio