PM
To: '160'
Subject: Topband: Still in search of resonance
List
Some of you may have followed my efforts in trying to shunt feed my 90'
Tri-Ex Skyneedle with 20 meter yagi at 93'. I'm still unable to find any
sort of resonance point on the tower. To refresh everyone's memory here
15, 2014 11:35 AM
To: 'Carl Braun'; '160'
Subject: Re: Topband: Still in search of resonance - Detailed Observations
and Calculations
Hi, Carl
I did a bit of further investigation and work on your problem.
I think you are done, as follows:
1.0 Just tap the Skyneedle at 90
-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Charlie
Cunningham
Sent: Saturday, February 15, 2014 11:45 AM
To: 'Carl Braun'; '160'
Subject: Re: Topband: Still in search of resonance - Detailed Observations
and Calculations
Sorry, Carl!
My loss tables didn't translate from
loss table, Carl
73,
Charlie, K4OTV
From: Charlie Cunningham [mailto:charlie-cunning...@nc.rr.com]
Sent: Saturday, February 15, 2014 11:35 AM
To: 'Carl Braun'; '160'
Subject: RE: Topband: Still in search of resonance - Detailed Observations and
Calculations
Hi, Carl
I did a bit of further
it is with the re-built loss table, Carl
73,
Charlie, K4OTV
From: Charlie Cunningham [mailto:charlie-cunning...@nc.rr.com]
Sent: Saturday, February 15, 2014 11:35 AM
To: 'Carl Braun'; '160'
Subject: RE: Topband: Still in search of resonance - Detailed Observations and
Calculations
Hi, Carl
I did a bit
: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Carl
Braun
Sent: Saturday, February 15, 2014 3:11 PM
To: Charlie Cunningham
Cc: topband@contesting.com
Subject: Re: Topband: Still in search of resonance - Detailed Observations
and Calculations
Charlie
Thank you for your work
'
Subject: Re: Topband: Still in search of resonance
Hi Carl,
It sounds like you are trying to find 50 ohms on the tower without any series
capacitor by looking at R and X. I would not try to do that. The reactance puts
you out of range on the MFJ bridge. You are down to a few bits difference
between
Hee!
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Carl
Braun
Sent: Saturday, February 15, 2014 3:53 PM
To: Tom W8JI; '160'
Subject: Re: Topband: Still in search of resonance
Tom
After reading your post yesterday I had a dream that I woke up
List
Some of you may have followed my efforts in trying to shunt feed my 90' Tri-Ex
Skyneedle with 20 meter yagi at 93'. I'm still unable to find any sort of
resonance point on the tower. To refresh everyone's memory here are the
specifics:
90' Skyneedle that is 12 round at the base and 4
Sorry Carl, I hit the send button before responding..Now.
I believe that first #14 wire is a bit small.
I do not believe that you will find a 50ohmZ and X=0 point.
I have 80ft of Rohn 45G with a Telrex 20M546 at 80ft, 3el on 15 at 90 and 3el
on 10 at 100ft. I shunt feed the tower for 160
with
Is the single 14AWG too thin causing goofy readings?
Absolutely! Treating the Sky Needle and the #12 wire as a folded
dipole and using 8 for the diameter of the tower, you have a 16:1
step-up with the single #14 wire.
If you made a cage of 4 or 6 wires with a 6 to 8 diameter, back of
the
@contesting.com
Sent: Friday, February 14, 2014 4:14:42 PM
Subject: Topband: Still in search of resonance
List
Some of you may have followed my efforts in trying to shunt feed my 90'
Tri-Ex Skyneedle with 20 meter yagi at 93'. I'm still unable to find any
sort of resonance point
: Friday, February 14, 2014 6:15 PM
To: '160'
Subject: Topband: Still in search of resonance
List
Some of you may have followed my efforts in trying to shunt feed my 90'
Tri-Ex Skyneedle with 20 meter yagi at 93'. I'm still unable to find any
sort of resonance point on the tower. To refresh
Hi Carl,
It sounds like you are trying to find 50 ohms on the tower without any
series capacitor by looking at R and X. I would not try to do that. The
reactance puts you out of range on the MFJ bridge. You are down to a few
bits difference between data points the PIC needs in the MFJ.
To: Charlie Cunningham; 'Carl Braun'; 'Joe Subich, W4TV'
Cc: topband@contesting.com
Subject: Re: Topband: Still in search of resonance - BTW Resonance
Subject: Re: Topband: Still in search of resonance - BTW Resonance
BTW Resonance = X=0 or jX = j0
So my dummy load is resonant, and the resistors in my
to
shunt feed that tower without a series-c in the gamma arm! No way!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Carl
Braun
Sent: Friday, February 14, 2014 6:15 PM
To: '160'
Subject: Topband: Still in search of resonance
List
Some
Tom and all
Thanks for the responses.
I was under the assumption that I would find a 50 ohm tap on the tower but with
a lot of reactance requiring a cap that would tune out the X but leave the 50
ohm resistive value in place.
I knew my tap was too low at 46' when I saw less than 50 ohms
than 50 ohms, a shunt C will be required.
GL,
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Carl
Braun
Sent: Friday, February 14, 2014 11:52 PM
To: Tom W8JI
Cc: 160
Subject: Re: Topband: Still in search of resonance
Tom and all
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