Re: Topband: Shunt-Fed tower how-to Video

[W7RH]

Great Job Steve (VE6WZ) on the shunt fed tower video. It's nice to see 
some quality technical chat on the reflector. yours is a great model for 
the new guys!


73

Bob, W7RH

--
W7RH DM35os

"It has become appallingly obvious that our technology has exceeded our 
humanity." - Albert Einstein

_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: FT-8 vs CW

[Phil Duff]

> On Apr 25, 2019, at 1:24 PM, FZ Bruce  wrote:
> 
> If he expires, the FT-8 could go on.

A misconception.   K1JT's WSJT-X software has a transmit watchdog timer with I 
believe a 5 minute max limit - can be set lower of course.

de NA4M


-. .- ….- --
Phil Duff  na4m[at]suddenlink[dot]net
















_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: Shunt-Fed tower how-to Video

[w5zn]

Steve,

This is an excellent tutorial. Thanks for not only sharing but taking 
the time to produce it as well.


73 Joel W5ZN


On 2019-04-24 20:03, VE6WZ_Steve wrote:

This week I added a second gamma-wire to my shunt fed tower for 160m
in order to lower the reactance and therefore lower the voltage across
my matching network.  This winter I was having some flash-over
problems.

While doing this work I decided to make a video that explains the
method for finding the 50 Ohm point on a tower, and the effect that
wire diameter has on the SWR bandwidth and reactance at the feedpoint.
 I show how I use both the AIM-4170b and the AR 55 zoom analyzers.

I wanted to post the link to the video here on the reflector because
over the years there have been a few questions about how to shunt-feed
a tower, and this might answer some practical questions about how to
go about it.  Maybe someone has a summer project in mind to turn their
tower into a TX antenna?

https://youtu.be/cHlc5MTGTFM 

73, de steve ve6wz.

_
Searchable Archives: http://www.contesting.com/_topband - Topband 
Reflector

_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: FT-8 vs CW

[VE6WZ Steve]

That’s what you call a “dead-easy” QSO.

From Babcocks iPhone

> On Apr 25, 2019, at 12:24 PM, FZ Bruce  wrote:
> 
> My two cents worth. I'm getting tired of the subject also. But I do
> not see it as human to human as an operator can go away while the
> device is still going. If he expires, the FT-8 could go on. If the
> ARRL did not feel right calling him/it a silent key, they could list
> it as a silent call sign. ( ; > )) 
> 
> 73
> Bruce k1fz
> 
>-From: "Victor Goncharsky via
> Topband" 
> To: topband@contesting.com
> Cc: 
> Sent: Thursday April 25 2019 12:25:31PM
> Subject: Re: Topband: FT-8 vs CW
> 
> Just a short story for this FT-8 vs CW/SSB discussion.
> We, with Helen UR5WA, have been waiting for QSL card from VR2XAN for
> 160m QSOs in CQWWCW 2017.
> Two direct requests both with IRC and $$$ have been sent but no
> answer.
> Tried some Italian assistance - same result.
> So the obvious decision was to give FT8 a try.
> This resulted in VR2KW QSOs and the next day LoTW confirmation.
> We have no interest nor intention to apply for Digital DXCC, but if
> there's no other option we'll work new ones on FT8. "The world is
> changed".
> 
> -- 
> 73, Victor Goncharsky US5WE/K1WE (UW5W in VHF contests, ex UB5WE),
> P.E.
> UARL Technical and VHF Committies
> DXCC Honor Roll #1 (Mixed, Phone), 10BDXCC, 8BWAS
> DXCC card checker (160 meters).
> _
> Searchable Archives: http://www.contesting.com/_topband [1] - Topband
> Reflector
> 
> 
> Links:
> --
> [1] http://www.contesting.com/_topband
> 
> _
> Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: FT-8 vs CW

[FZ Bruce]

My two cents worth. I'm getting tired of the subject also. But I do
not see it as human to human as an operator can go away while the
device is still going. If he expires, the FT-8 could go on. If the
ARRL did not feel right calling him/it a silent key, they could list
it as a silent call sign. ( ; > )) 

73
Bruce k1fz

-From: "Victor Goncharsky via
Topband" 
To: topband@contesting.com
Cc: 
Sent: Thursday April 25 2019 12:25:31PM
Subject: Re: Topband: FT-8 vs CW

Just a short story for this FT-8 vs CW/SSB discussion.
 We, with Helen UR5WA, have been waiting for QSL card from VR2XAN for
160m QSOs in CQWWCW 2017.
 Two direct requests both with IRC and $$$ have been sent but no
answer.
 Tried some Italian assistance - same result.
 So the obvious decision was to give FT8 a try.
 This resulted in VR2KW QSOs and the next day LoTW confirmation.
 We have no interest nor intention to apply for Digital DXCC, but if
there's no other option we'll work new ones on FT8. "The world is
changed".

 -- 
 73, Victor Goncharsky US5WE/K1WE (UW5W in VHF contests, ex UB5WE),
P.E.
 UARL Technical and VHF Committies
 DXCC Honor Roll #1 (Mixed, Phone), 10BDXCC, 8BWAS
 DXCC card checker (160 meters).
 _
 Searchable Archives: http://www.contesting.com/_topband [1] - Topband
Reflector
 

Links:
--
[1] http://www.contesting.com/_topband

_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: FT-8 vs CW

[Victor Goncharsky via Topband]

Just a short story for this FT-8 vs CW/SSB discussion.
We, with Helen UR5WA, have been waiting for QSL card from VR2XAN for 160m QSOs 
in CQWWCW 2017.
Two direct requests both with IRC and $$$ have been sent but no answer.
Tried some Italian assistance - same result.
So the obvious decision was to give FT8 a try.
This resulted in VR2KW QSOs and the next day LoTW confirmation.
We have no interest nor intention to apply for Digital DXCC, but if there's no 
other option we'll work new ones on FT8.  "The world is changed".


-- 
73, Victor Goncharsky US5WE/K1WE (UW5W in VHF contests, ex UB5WE), P.E.
UARL Technical and VHF Committies
DXCC Honor Roll #1 (Mixed, Phone), 10BDXCC, 8BWAS
DXCC card checker (160 meters).
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: Shunt-Fed tower how-to Video

[John Chappell G3XRJ]

Steve,

That's an excellent video.
Both in the technique of shunt feeding and the overall video 
presentation which sets the bar.

Most impressive.
73

John G3XRJ

This week I added a second gamma-wire to my shunt fed tower for 160m in order 
to lower the reactance and therefore lower the voltage across my matching 
network.  This winter I was having some flash-over problems.

While doing this work I decided to make a video that explains the method for 
finding the 50 Ohm point on a tower, and the effect that wire diameter has on 
the SWR bandwidth and reactance at the feedpoint.  I show how I use both the 
AIM-4170b and the AR 55 zoom analyzers.

I wanted to post the link to the video here on the reflector because over the 
years there have been a few questions about how to shunt-feed a tower, and this 
might answer some practical questions about how to go about it.  Maybe someone 
has a summer project in mind to turn their tower into a TX antenna?

https://youtu.be/cHlc5MTGTFM 

73, de steve ve6wz.



_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector