[CQ-Contest] 15m Yagi question

[Jukka Klemola]

Sirs,

Aluminum to Aluminum grease:

This is suitable
https://fi.iherb.com/pr/Vaseline-100-Pure-Petroleum-Jelly-Original-3-75-oz-160-g/73872?gclid=EAIaIQobChMIqMfgn7jG7QIVgdiyCh1OCwGQEAQYASABEgJQC_D_BwE&gclsrc=aw.ds

I use similar European product.

I use also paste with aluminum particles/powder, local equivalent to this:
https://www.permatex.com/products/lubricants/specialty-lubricants-anti-seize/permatex-anti-seize-lubricant-2/?locale=en_us


There are products the high voltage high power electricity line workers use.
All their high current connections are Aluminum to Aluminum.
They have maxed out the conductivity, minimized the losses.
I could not find their North American products online, but I am sure
finding their products is not that difficult.


Note !
Any grease with copper powder .. not recommended for Aluminum to Aluminum
connections.


73,
Jukka OH6LI


pe 11. jouluk. 2020 klo 18.15 john at kk9a.com kirjoitti:

> Hy-Gain typically uses Ø7/16 element tips with a very thin wall, not
> 7/8.  I have owned a couple of Hy-Gain 20m beams that I used for
> temporary contest antennas and never had much luck keeping the element
> tips from shedding. I suppose rope would help but in my opinion there
> are much better taper schedules.  Ø7/16 drawn tubing is a little
> difficult to find, if you could find it with a .058 wall it would be
> an upgrade. Regarding not being able to get the sections apart since
> it has no conductive grease, depending on your environment it may
> easily come apart. I never had trouble taking antennas apart in
> Illinois. I did not start using Penetrox until I built a station in
> Aruba where the corrosion was intense. Now I use it regularly
> everywhere.
>
> John KK9A
>
>
> CAROL RICHARDS N2MM wrote:
>
> Hello all,
>
> I am re-furbishing part of the driven element for my 155CA. the
> element uses two sections of tubing. The part that goes into the
> insulator to the boom is 84 inches of 7/8 tubing swaged. No bends. The
> tip is also 7/8 inch swaged and has a bend about mid section. My
> question concerns the tip which was bent on its way down from the
> tower. Removing the tip would be quite a problem since no penetrox was
> used when it was installed. Does having a slight bend in the tip
> really affect its performance?
>
> Thoughts?
>
>
> Carol
>
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