Topband: How good is good enough

[CUTTER DAVID]

I'd be interested to know how you make the joints, then add joints to joints, then...doesn't it get a bit lumpy?  Do you solder or crimp or nuts and bolts, joints in three at a time...?

David G3UNA


> On 12/11/2022 16:41 Grant Saviers <grants2 at pacbell.net> wrote:
> 
>  
> The 34 ohms is the sum of Rr (antenna radiation Z over perfect ground) 
> and Rg (ground R loss).  Rr depends on the dimensions of the L plus a 
> bit of wire loss.  My guess is Rr is about 10 ohms less than 34 ohms, 
> some easy modeling will determine it.
> 
> Then it is a question of what antenna efficiency you want vs cost and 
> time for more radials.  If 10 ohms is Rg, then about 1/3 of the TX power 
> is warming the worms.
> 
> Grant KZ1W
> 
> On 11/12/2022 07:31, ws6x.ars at gmail.com wrote:
> > In my experience here in "ROCK"ingham County, I didn't reach the point of diminishing returns until around 32 radials of varying lengths (Most were either 50 or 100' long.). Much would depend on length, configuration, terrain and ground conductivity.
> > Jim - WS6X
> > 
> > -----Original Message-----
> > From: Topband <topband-bounces+ws6x.ars=gmail.com at contesting.com> On Behalf Of Pete Smith N4ZR
> > Sent: Monday, November 7, 2022 4:27 PM
> > To: topband reflector <Topband at contesting.com>
> > Subject: Topband: How good is good enough
> > 
> > Now that the lawn mowing is done for the season, I resuscitated my 160M inverted L.  With 13 on the ground radials, each roughly 70 feet long, measured R of 34 ohms seems OK to me.  Is it worth laying down more radials, or am I approaching diminishing returns?
> > --
> > 73, Pete N4ZR
> > 
> > 
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