[nikiml]

What direction is the antenna facing currently? With the 140 degree spread that you have it won't be easy to get all channels with single antenna. Especially with GH type...

 

[nikiml]

Wow, thank you both for the fast respond, I’m really appreciated. In respond to Nikiml I’m pointed at about 157 degree magnetic direction. I have question about your GH 10n3. I went to your website and look at your GH10n3, I can see all the measurement when I pointed to the elements or the reflectors, but what I don’t understand is, the 3 separate number at the end of each reflector for example on the GH10n3 top reflector with round end (-96.5,285.9,661.5). One other thing how do I figure out the space between the reflectors and the height between the reflectors and the elements (http://clients.teksavvy.com/~nickm/gh_n_uV/gh10n_6V9_14u65.html) sorry I’m real new to these.

The three numbers are the x, y and z coordinates of the end point. You can figure out the height distance of two points by subtracting their z values, the depth distance by subtracting the x values and the left-right distance by subtracting the y values ( just look at the coordinate system in the middle for reference).

Alternatively you can select two elements ( line and line, point and point or point and line) by mouse click - they will turn pink and then you will see x,y,z, delta_x, delta_y and delta_z info at the top of the 3d window. Double click anywhere to clear the selection.

 

[nikiml]

Nikiml, maybe we ought to work on a n3/n6 retro-fit for the original SBGH/DBGH (with the slightly later added wider feedpoint of 89mm) since quite a few have been built.

That is probably a good idea - I pick the SBGH, which one do you pick?

Do you have ready parametrized models for those?

Actually I have a parametrized model for the SBGH. Just don't know the parameters values...

 

[nikiml]

ok. here it is...

I had forgotten that I've done that.

None of those models from the beginning of the thread is done properly though.
I used the 4nec2 optimizer for all of them. Therefore they could all be suboptimal...

 

[nikiml]

Well,
a full retrofit can just leave the metal pieces intact and change everything else - spacings positions, allow for hat tilt...
I would still be a general model.

A smaller retrofit will be to just allow hat tilt. or hat tilt an spacings change.

 

[nikiml]

HI Nikiml
I decided to build the GH10n3 as 300ohm suggested I need you help with the measurement from you site. What I did was I clicked and highlighted between the 2 point and I can see the distance on the top either say DX or DZ. For example the distance between the top reflector and the one under is 183.4 mm. Is this correct? I just want to make sure I got the right measurement before I get started. Thank you.

Yes, this is correct.
Just that ( I haven't paid enough attention I guess ) there is another gh10n3 which is probably better if you want to put the 3 narod reflector from the start.

PS. I plan to post some more on gh6 gen1 retrofitting later tonight.

 

[nikiml]

thanks Nikiml. this Gh10n3 that you show me is this what it call a Non-modular UHF/VHF-hi.

yes.

they seem to be little smaller then you other Gh10n3.

yes, it is smaller, but has more wire, so it is heavier and therefore is bigger.

Are they better because they are higher gain?.

yes. higher gain and lower swr.