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[HZ1MW]

I thank you all from the bottom of my heart for your response
The word "thank you" is not enough to thank you

I have not been able to try your proposed solutions for the past two days due to the work conditions.
I will try it as soon as possible and give you the results.
Also, your suggestions gave me some ideas, and I will present the results to you shortly.

I wish you happy times 73



One of the solutions I have thought of
The control cable for the tuner is 10 meters long, and I do not need all of this inside the car. I will make another about 3 meters long.
Also a coaxial cable between the radio and the tuner, I will make it about 3 meters

The tuner is inside the car, I will try to find a place for it close to the antenna, since it is waterproof and dustproof

[HZ1MW]

Hello everyone
I apologize for the recent interruption due to circumstances beyond my control.
 I changed the location of the tuner, and made it close to the antenna feeding point, and made the length of the feeding wire not more than 20 cm, so the tuning was fine from the 40 to the 6 meters band,
I only need now  To install the tuner is close to the antenna, but what prevents me at the moment is my fear of it being stolen, so I will try to find ways to prevent that,

thank you very much to everyone who participated in this page and helped me and gave me some ideas.
Greetings to everyone and I hope to talk to you one day via  the radio .
HZ1MW
.73

[KL7CW]

IF NECESSARY, you may be able to get by with a longer feed wire.  Make sure it is well insulated for RF, since voltages will be very high on some frequencies, even with 100 watts or less.  Try and keep the wire at least 4 cm away from metal or other conductive surfaces.  If the feed wire runs parallel to a nearby conductor, it will act like a piece of coax, not good since the capacitance to ground will often have a bad effect on the ability of your tuner to tune on some bands.  If you need to run the wire through a hole in the metal, or cross a metal brace, you might be able to get away with this.  Probably there is little useful radiation from any feed wire inside the vehicle, or even outside down low, so keep the wire short so most useful radiation is from the whip antenna.
               Rick  KL7CW

[KM3F]

Just to add to the cause of your issue.
The Tuner can only match to an antenna that presents an Impedance the Tuner >range<is designed to match into.
If the antenna is on the edge of this range, it may or may not at different times.
Changes in the feed wire can put that Impedance into the Tuner's range.
A different way to look at it.
Good luck.