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Thank for your input Bob. I wanted to test the whole system in order to discard any problems with it. Now I know it was the proximity between the yagi and the Vector.

Now that I found the issue and fixed it, I’ll try again to tune the antenna where I wanted to work.

Sirio states in the tuning table that if you want it to resonate in channel 20, L3 should be set to 730mm = 58 3/4” and then the L2 ( gamma ) should be adjusted from 630mm to 640mm.

I did it like that but instead to resonate on channel 20, resonates just below channel 1. I played with the gamma match as Sirio recommends but what is does is that it remains on the same frequency , let’s say 26,885 and lowest SWR on that frequency . It can be 1.3, 1.5. 1.8, etc. Check with the analyzer for any dip on up and down but nothing. In other words, I can’t shift resonant frequency just by adjusting the gamma match.

<blockquote data-quote="Alexis Mercado" data-source="post: 746145" data-attributes="member: 47391">Thank for your input Bob. I wanted to test the whole system in order to discard any problems with it. Now I know it was the proximity between the yagi and the Vector. Now that I found the issue and fixed it, I’ll try again to tune the antenna where I wanted to work. Sirio states in the tuning table that if you want it to resonate in channel 20, L3 should be set to 730mm = 58 3/4” and then the L2 ( gamma ) should be adjusted from 630mm to 640mm. I did it like that but instead to resonate on channel 20, resonates just below channel 1. I played with the gamma match as Sirio recommends but what is does is that&nbsp; it remains on the same frequency , let’s say 26,885 and lowest SWR on that frequency . It can be 1.3, 1.5. 1.8, etc. Check with the analyzer for any dip on up and down but nothing. In other words, I can’t shift resonant frequency just by adjusting the gamma match.</blockquote>

[QUOTE="Alexis Mercado, post: 746145, member: 47391"] Thank for your input Bob. I wanted to test the whole system in order to discard any problems with it. Now I know it was the proximity between the yagi and the Vector. Now that I found the issue and fixed it, I’ll try again to tune the antenna where I wanted to work. Sirio states in the tuning table that if you want it to resonate in channel 20, L3 should be set to 730mm = 58 3/4” and then the L2 ( gamma ) should be adjusted from 630mm to 640mm. I did it like that but instead to resonate on channel 20, resonates just below channel 1. I played with the gamma match as Sirio recommends but what is does is that it remains on the same frequency , let’s say 26,885 and lowest SWR on that frequency . It can be 1.3, 1.5. 1.8, etc. Check with the analyzer for any dip on up and down but nothing. In other words, I can’t shift resonant frequency just by adjusting the gamma match. [/QUOTE]

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