[TowerTalk] Outboard tuner

[n4kg@juno.com]

I expect your filter is designed for 50 ohm terminations so
it should be between the transmitter and antenna tuner.

Using a very short antenna with coax will result in VERY
HIGH  SWR which will cause the coax losses to increase.

Lower loss feedline such as LADDERLINE will minimize
feedline losses.

Dropping the feedline straight down and feeding the 40M
dipole as a top loaded vertical on 80 and 160M would be
even more efficient.  Of course you will need radials,
preferably 30 or more.

de  Tom  N4KG

On Mon, 26 Jun 2000 23:19:06 HST "Ted Leaf" <tleaf@hotmail.com> writes:
> 
> Hi Guys,
> 
> I have been using my internal tuner in my Yaesu 890AT for years.  
> But now I 
> would like to be able to tune 80 and maybe even 160M on my double 
> extended 
> Zepp cut for 40M.
> 
> So it's time for an external outboard tuner.
> 
> Question:  For ease of installation, I want to place the tuner 
> between the 
> rig and the low pass filter.  Is this OK, or must I place it been 
> the filter 
> and the coax feed line?
> 
> 73, Aloha
> Ted Leaf, K6HI
> Kona, Hawaii
> <tleaf@hotmail.com>
> 
>
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