Re: Topband: Rx Antenna System

[tony.kaz--- via Topband]

Hi Fred,
When I moved to upstate NY 25 years ago I put up 3 beverages ranging in length 
from 300-350'. That was the max length I could fit on my property. They had 
directivity and some F/B. I should add I am using these receive antennas for 
160M. My 80M wire 4-sq always seemed to outperform my receive antennas, 
I put up a Ewe. It's performance seemed to depend on the weather (how wet the 
soil). So I put an insulated wire on the ground tying the feed point and 
terminating point together and lifting the ground connections. Kind of an off 
center Flag. That seemed to help. Then I put up a couple Pennants. Made them 
switchable in direction. I never had a case with our soil where the beverages 
were better than the Pennants so after a season I took down the beverages. 
Next installed a 3-el short, non-radial W1FV vertical E/W. That has been 
working quite well.
Then I put up a 220' BOG, N/S. There are occasions when any of the antennas - 
BOG, W1FV or Pennant may be the best.
Pennants are NE/SW and SE/NW.
On the other side of the property I plan on putting up a E/W BOG to see how it 
compares to the W1FV array.
I also installed the ground rods and ground anchors for another 3-el W1FV 
array, NE/SW when I get time. 
I don't have room to put up a low impedance receive array that requires 
radials. 
I have my receive antennas for the most part at right angles from my tower to 
minimize shooting through the tower.
I do miss my 625' beverages I had in southern New Joisey. 
73,
N2TK Tony


-Original Message-
From: Topband  On Behalf Of fmoeves
Sent: Friday, November 22, 2019 4:29 PM
To: topband@contesting.com
Subject: Re: Topband: Rx Antenna System

Tony, I put up a short 300' Beverage pointing to EU. It works great here in KY. 
It's abt 8' high. My point is give it a try might surprise you. Also kave a 
K9AY loop and at times it's better. Fred KB4QZH
 Original message From: "tony.kaz--- via Topband" 
 Date: 11/22/19  10:12 AM  (GMT-05:00) To: 'Paul Mcl' 
, 'William Hill'  Cc: 
topband@contesting.com Subject: Re: Topband: Rx Antenna System Has anyone had 
experience with this system and have done a comparison toother receive 
antennas? I have room to put up a BOG about 200' long at aright angle and about 
100' away from my present BOG. But it would bedifficult to get the feedline to 
either end of the wire. This system lookslike I can put the feed point near the 
center and get selection of eitherdirection. I can run RG6 stapled to the grass 
both for the feedline and forthe BOG.By the way my present BOG is sometimes 
better than my Pennants and sometimesthe Pennants are better. Wish I had the 
room for a beverage.N2TK, Tony -Original Message-From: Topband 
 On Behalf Of Paul MclSent: Friday, November 
22, 2019 9:47 AMTo: Willi
 am Hill Cc: topband@contesting.comSubject: Re: Topband: Rx 
Antenna 
SystemHere:https://static.dxengineering.com/global/images/technicalarticles/ums-bevflex-4x.pdfRegardsPaul
 MM0ZBHOn Fri, 22 Nov 2019 at 14:26, William Hill  wrote:> 
Does anyone recall the vendor that sells the system that can be > configured in 
several different ways such as a beverage or BOG or flag orpennant?>> Sent from 
my iPhone> _> Searchable Archives: 
http://www.contesting.com/_topband - Topband > 
Reflector>_Searchable Archives: 
http://www.contesting.com/_topband - Topband 
Reflector_Searchable Archives: 
http://www.contesting.com/_topband - Topband Reflector _ 
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

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Re: Topband: Rx Antenna System

[Chortek, Robert L.]

Short beverages can do absolute wonders!  I’ve got one 300’ long and 3’ 
high running N/S and have worked dozens of station I could not hear on any 
other antenna!

73,

Bob AA6VB 
Robert L. Chortek

> On Nov 22, 2019, at 1:37 PM, fmoeves  wrote:
> 
_
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Re: Topband: Rx Antenna System

[fmoeves]

Tony, I put up a short 300' Beverage pointing to EU. It works great here in KY. 
It's abt 8' high. My point is give it a try might surprise you. Also kave a 
K9AY loop and at times it's better. Fred KB4QZH 
 Original message From: "tony.kaz--- via Topband" 
 Date: 11/22/19  10:12 AM  (GMT-05:00) To: 'Paul Mcl' 
, 'William Hill'  Cc: 
topband@contesting.com Subject: Re: Topband: Rx Antenna System Has anyone had 
experience with this system and have done a comparison toother receive 
antennas? I have room to put up a BOG about 200' long at aright angle and about 
100' away from my present BOG. But it would bedifficult to get the feedline to 
either end of the wire. This system lookslike I can put the feed point near the 
center and get selection of eitherdirection. I can run RG6 stapled to the grass 
both for the feedline and forthe BOG.By the way my present BOG is sometimes 
better than my Pennants and sometimesthe Pennants are better. Wish I had the 
room for a beverage.N2TK, Tony -Original Message-From: Topband 
 On Behalf Of Paul MclSent: Friday, November 
22, 2019 9:47 AMTo: William Hill Cc: 
topband@contesting.comSubject: Re: Topband: Rx Antenna 
SystemHere:https://static.dxengineering.com/global/images/technicalarticles/ums-bevflex-4x.pdfRegardsPaul
 MM0ZBHOn Fri, 22 Nov 2019 at 14:26, William Hill  wrote:> 
Does anyone recall the vendor that sells the system that can be > configured in 
several different ways such as a beverage or BOG or flag orpennant?>> Sent from 
my iPhone> _> Searchable Archives: 
http://www.contesting.com/_topband - Topband > 
Reflector>_Searchable Archives: 
http://www.contesting.com/_topband - Topband 
Reflector_Searchable Archives: 
http://www.contesting.com/_topband - Topband Reflector
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Re: Topband: Rx Antenna System

[tony.kaz--- via Topband]

Tnx for all the feedback. Yes, I agree pretty easy to make the boxes and 
transformers. Probably have most if not all the material. But time is not on my 
side. Here is upstate NY I am now fighting the weather cause I waited too long 
to do this project. So, feedback says the kit works fine so I will buy a kit.
Sounds like I need to water proof the boxes. That's what plastic outside 
storage boxes are for. Hopefully the ground won't freeze for a while so I can 
pound in the ground rods and staple the BOG RG6 to the grass.
73
N2TK, Tony

-Original Message-
From: Jamie WW3S  
Sent: Friday, November 22, 2019 12:31 PM
To: Charlie Young ; tony@verizon.net; 'Paul Mcl' 
; 'William Hill' 
Cc: topband@contesting.com
Subject: Re[2]: Topband: Rx Antenna System

NOTE: there is a slight difference between the current version at DXE, and the 
original.,the orginal has different connections points on the external box 
that installs to the antenna, the DXE version has one connection, and uses 
internal jumpers to select which type of antenna you are using.

-- Original Message --
From: "Charlie Young" 
To: "tony@verizon.net" ; "'Paul Mcl'" 
; "'William Hill'" 
Cc: "topband@contesting.com" 
Sent: 11/22/2019 11:56:13 AM
Subject: Re: Topband: Rx Antenna System

>I have one of the Bevflex systems deployed as a short beverage.  I have also 
>used it configured as a BOG.   Mine is the version that was marketed by JK 
>Antennas.
>
>It works as advertised.  Good f/b ratio.  There does not seem to be a 
>reduction in output on the reverse direction.
>
>The main advantage of it is placement of the feedpoint anywhere on the 
>antenna, making it convenient to feed.  You can also change the transformer 
>taps and configure it multiple ways, such as BOG, beverage, EWE etc.   I have 
>not tried it configured as anything but a BOG and beverage.
>
>I also have 7 other BOG antennas, using the KD9SV transformer, plus a HiZ 
>triangle array.  The Bevflex holds its own with these antennas.   The triangle 
>has the highest output, but at times is more susceptible to noise (power 
>line).  Sometimes the triangle is best, at other times the BOG/Bevflex are the 
>best, depending on condx.
>
>I can’t keep beverages up in my woods and have given up.  The next time the 
>Bevflex comes down, it will be reconfigured as a BOG again.
>
>I have my rx antennas configured so that most of them can be combined (phased) 
>through a DX Engineering NCC-1 box.  This works very well, and many times the 
>performance is enhanced when BOG pairs are phased.
>
>73 Charlie N8RR
>
>
>
>Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for 
>Windows 10
>
>From: tony.kaz--- via Topband<mailto:topband@contesting.com>
>Sent: Friday, November 22, 2019 10:12 AM
>To: 'Paul Mcl'<mailto:paul@gmail.com>; 'William 
>Hill'<mailto:w...@comcast.net>
>Cc: topband@contesting.com<mailto:topband@contesting.com>
>Subject: Re: Topband: Rx Antenna System
>
>Has anyone had experience with this system and have done a comparison 
>to other receive antennas? I have room to put up a BOG about 200' long 
>at a right angle and about 100' away from my present BOG. But it would 
>be difficult to get the feedline to either end of the wire. This system 
>looks like I can put the feed point near the center and get selection 
>of either direction. I can run RG6 stapled to the grass both for the 
>feedline and for the BOG.
>
>By the way my present BOG is sometimes better than my Pennants and 
>sometimes the Pennants are better. Wish I had the room for a beverage.
>N2TK, Tony
>
>-Original Message-
>From: Topband  On Behalf Of Paul Mcl
>Sent: Friday, November 22, 2019 9:47 AM
>To: William Hill 
>Cc: topband@contesting.com
>Subject: Re: Topband: Rx Antenna System
>
>Here:
>
>https://static.dxengineering.com/global/images/technicalarticles/ums-be
>vflex
>-4x.pdf
>
>Regards
>
>Paul MM0ZBH
>
>
>
>On Fri, 22 Nov 2019 at 14:26, William Hill  wrote:
>
>>  Does anyone recall the vendor that sells the system that can be  
>> configured in several different ways such as a beverage or BOG or 
>> flag or
>pennant?
>>
>>  Sent from my iPhone
>>  _
>>  Searchable Archives: http://www.contesting.com/_topband - Topband  
>> Reflector
>>
>_
>Searchable Archives: http://www.contesting.com/_topband - Topband 
>Reflector
>
>_
>Searchable Archives: http://www.contesting.com/_topband - Topband 
>Reflector
>
>_
>Searchable Archives: http://www.contesting.com/_topband - Topband 
>Reflector


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Re: Topband: Rx Antenna System

[Artek Manuals]

Tony

I have used one of these they do work . I had an opportunity to compare 
it with a more typical end fed bog of the same length in the same 
direction. They are identical in performance . In my situation both 
BOG's were installed over very poor ( essentially well drained dry sand).


Pro's
1) easy to install
2) Works as good any "standard BOG" would at your location , when 
installed in a similar manor as you would any other BOG ( no better, no 
worse, no magic)

3) Easy bidirectional switching
4) Built in receiver protection against high RF levels ( back to back 
diodes)

5) Built in� lightening protection
6) Fused protection to keep you from frying the unit if you transmit into it
7) Allows you to experiment with other receiving antennas� such as 
Flags, Pennants and standard beverages as well as bogs all from the same 
box ( depending on the configuration you must open the end reflection 
boxes and move jumpers) As shipped comes default for BOGS and Beverages
8) The feed point can indeed be inserted at ANY point along the antenna 
without affecting the performance


Cons
1) Very expensive for what it is, sells for at least 2X what the bill of 
material suggests it should ($75-$150 is more realistic price,� IMO)
2) While it comes with stainless hardware, some of it is cheap Chinese 
cr#$, Some pieces on mine began showing rust after less than 60 days in 
Florida's monsoon climate, Plan of having to replace that at some point
3) IMO the boxes will not remain water tight with repeated closing and 
opening to move jumpers etc, based on similar experience with this style 
box that I have purchased for other DIY projects. Once you are through 
playing, plan on taking more diligent sealing steps once a permanent 
installation is decided on
4) The fuse noted in #6 above is an odd package� ( to me anyway) low 
current 50ma job in a solder in package. I think I would choose a more 
typical cylindrical clip in holder, there is certainly room in the box.
5) The 2way box in the shack is too light ( needs a couple of pounds to 
hold it down)



Interesting Info, Hints & Kinks

1) No BOG will work as well� when placed too close to a wire ( chain 
link) fence. allow at least 5' set back
2) The basic center fed RG-6 design is right out of Misek, W1WCR's 
Beverage Antenna Handbook , 2nd Edition, Page 68
3) Mostly easy to reverse engineer once you have a set in your hands, 
not surprisingly they will not supply schematics.
4) The "magic" is in the end "Reflection " Boxes which have selectable 
(via the jumper settings)� impedance ratios depending on the antenna 
type (BOG, Beverage, Flag, etc) to be used with.
5) Yes I have reverse engineered the the thing ( I pad $$$ for the 
ability to do so) and NO I will not share the results directly with you 
. I will point out that If you don't need the flexibility of using the 
same set of boxes for many different types of receiving antennas then 
build a set with reflection boxes for that specific geometry and you 
don't need the more complex� jumper selectable box. Again I refer you to 
Misek's book for starters.
6) My set is currently on loan to a friend who is trying it out at his 
location . IF he decides not to buy it from me it will be available at a 
discount from the new price. Dont email me I will let you know if I sell 
other than to my friend.


Cu you all in the pile up

Dave
NR1DX

On 11/22/2019 10:12 AM, tony.kaz--- via Topband wrote:

https://static.dxengineering.com/global/images/technicalarticles/ums-bevflex
-4x.pdf


--
Dave
manu...@artekmanuals.com
www.ArtekManuals.com

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

Re: Topband: Rx Antenna System

[Jamie WW3S]

NOTE: there is a slight difference between the current version at DXE, 
and the original.,the orginal has different connections points on 
the external box that installs to the antenna, the DXE version has one 
connection, and uses internal jumpers to select which type of antenna 
you are using.


-- Original Message --
From: "Charlie Young" 
To: "tony@verizon.net" ; "'Paul Mcl'" 
; "'William Hill'" 

Cc: "topband@contesting.com" 
Sent: 11/22/2019 11:56:13 AM
Subject: Re: Topband: Rx Antenna System


I have one of the Bevflex systems deployed as a short beverage.  I have also 
used it configured as a BOG.   Mine is the version that was marketed by JK 
Antennas.

It works as advertised.  Good f/b ratio.  There does not seem to be a reduction 
in output on the reverse direction.

The main advantage of it is placement of the feedpoint anywhere on the antenna, 
making it convenient to feed.  You can also change the transformer taps and 
configure it multiple ways, such as BOG, beverage, EWE etc.   I have not tried 
it configured as anything but a BOG and beverage.

I also have 7 other BOG antennas, using the KD9SV transformer, plus a HiZ 
triangle array.  The Bevflex holds its own with these antennas.   The triangle 
has the highest output, but at times is more susceptible to noise (power line). 
 Sometimes the triangle is best, at other times the BOG/Bevflex are the best, 
depending on condx.

I can’t keep beverages up in my woods and have given up.  The next time the 
Bevflex comes down, it will be reconfigured as a BOG again.

I have my rx antennas configured so that most of them can be combined (phased) 
through a DX Engineering NCC-1 box.  This works very well, and many times the 
performance is enhanced when BOG pairs are phased.

73 Charlie N8RR



Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

From: tony.kaz--- via Topband<mailto:topband@contesting.com>
Sent: Friday, November 22, 2019 10:12 AM
To: 'Paul Mcl'<mailto:paul@gmail.com>; 'William 
Hill'<mailto:w...@comcast.net>
Cc: topband@contesting.com<mailto:topband@contesting.com>
Subject: Re: Topband: Rx Antenna System

Has anyone had experience with this system and have done a comparison to
other receive antennas? I have room to put up a BOG about 200' long at a
right angle and about 100' away from my present BOG. But it would be
difficult to get the feedline to either end of the wire. This system looks
like I can put the feed point near the center and get selection of either
direction. I can run RG6 stapled to the grass both for the feedline and for
the BOG.

By the way my present BOG is sometimes better than my Pennants and sometimes
the Pennants are better. Wish I had the room for a beverage.
N2TK, Tony

-Original Message-
From: Topband  On Behalf Of Paul Mcl
Sent: Friday, November 22, 2019 9:47 AM
To: William Hill 
Cc: topband@contesting.com
Subject: Re: Topband: Rx Antenna System

Here:

https://static.dxengineering.com/global/images/technicalarticles/ums-bevflex
-4x.pdf

Regards

Paul MM0ZBH



On Fri, 22 Nov 2019 at 14:26, William Hill  wrote:


 Does anyone recall the vendor that sells the system that can be
 configured in several different ways such as a beverage or BOG or flag or

pennant?


 Sent from my iPhone
 _
 Searchable Archives: http://www.contesting.com/_topband - Topband
 Reflector


_
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_
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Re: Topband: Rx Antenna System

[Charlie Young]

I have one of the Bevflex systems deployed as a short beverage.  I have also 
used it configured as a BOG.   Mine is the version that was marketed by JK 
Antennas.

It works as advertised.  Good f/b ratio.  There does not seem to be a reduction 
in output on the reverse direction.

The main advantage of it is placement of the feedpoint anywhere on the antenna, 
making it convenient to feed.  You can also change the transformer taps and 
configure it multiple ways, such as BOG, beverage, EWE etc.   I have not tried 
it configured as anything but a BOG and beverage.

I also have 7 other BOG antennas, using the KD9SV transformer, plus a HiZ 
triangle array.  The Bevflex holds its own with these antennas.   The triangle 
has the highest output, but at times is more susceptible to noise (power line). 
 Sometimes the triangle is best, at other times the BOG/Bevflex are the best, 
depending on condx.

I can’t keep beverages up in my woods and have given up.  The next time the 
Bevflex comes down, it will be reconfigured as a BOG again.

I have my rx antennas configured so that most of them can be combined (phased) 
through a DX Engineering NCC-1 box.  This works very well, and many times the 
performance is enhanced when BOG pairs are phased.

73 Charlie N8RR



Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

From: tony.kaz--- via Topband<mailto:topband@contesting.com>
Sent: Friday, November 22, 2019 10:12 AM
To: 'Paul Mcl'<mailto:paul@gmail.com>; 'William 
Hill'<mailto:w...@comcast.net>
Cc: topband@contesting.com<mailto:topband@contesting.com>
Subject: Re: Topband: Rx Antenna System

Has anyone had experience with this system and have done a comparison to
other receive antennas? I have room to put up a BOG about 200' long at a
right angle and about 100' away from my present BOG. But it would be
difficult to get the feedline to either end of the wire. This system looks
like I can put the feed point near the center and get selection of either
direction. I can run RG6 stapled to the grass both for the feedline and for
the BOG.

By the way my present BOG is sometimes better than my Pennants and sometimes
the Pennants are better. Wish I had the room for a beverage.
N2TK, Tony

-Original Message-
From: Topband  On Behalf Of Paul Mcl
Sent: Friday, November 22, 2019 9:47 AM
To: William Hill 
Cc: topband@contesting.com
Subject: Re: Topband: Rx Antenna System

Here:

https://static.dxengineering.com/global/images/technicalarticles/ums-bevflex
-4x.pdf

Regards

Paul MM0ZBH



On Fri, 22 Nov 2019 at 14:26, William Hill  wrote:

> Does anyone recall the vendor that sells the system that can be
> configured in several different ways such as a beverage or BOG or flag or
pennant?
>
> Sent from my iPhone
> _
> Searchable Archives: http://www.contesting.com/_topband - Topband
> Reflector
>
_
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_
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Re: Topband: Rx Antenna System

[tony.kaz--- via Topband]

Has anyone had experience with this system and have done a comparison to
other receive antennas? I have room to put up a BOG about 200' long at a
right angle and about 100' away from my present BOG. But it would be
difficult to get the feedline to either end of the wire. This system looks
like I can put the feed point near the center and get selection of either
direction. I can run RG6 stapled to the grass both for the feedline and for
the BOG.

By the way my present BOG is sometimes better than my Pennants and sometimes
the Pennants are better. Wish I had the room for a beverage.
N2TK, Tony 

-Original Message-
From: Topband  On Behalf Of Paul Mcl
Sent: Friday, November 22, 2019 9:47 AM
To: William Hill 
Cc: topband@contesting.com
Subject: Re: Topband: Rx Antenna System

Here:

https://static.dxengineering.com/global/images/technicalarticles/ums-bevflex
-4x.pdf

Regards

Paul MM0ZBH



On Fri, 22 Nov 2019 at 14:26, William Hill  wrote:

> Does anyone recall the vendor that sells the system that can be 
> configured in several different ways such as a beverage or BOG or flag or
pennant?
>
> Sent from my iPhone
> _
> Searchable Archives: http://www.contesting.com/_topband - Topband 
> Reflector
>
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

_
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Re: Topband: Rx Antenna System

[Paul Mcl]

Here:

https://static.dxengineering.com/global/images/technicalarticles/ums-bevflex-4x.pdf

Regards

Paul MM0ZBH



On Fri, 22 Nov 2019 at 14:26, William Hill  wrote:

> Does anyone recall the vendor that sells the system that can be configured
> in several different ways such as a beverage or BOG or flag or pennant?
>
> Sent from my iPhone
> _
> Searchable Archives: http://www.contesting.com/_topband - Topband
> Reflector
>
_
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Re: Topband: RX antenna switching - unused ports

[Herbert Schoenbohm]

Brad, I have a 12x1 commercial Panasonic video switcher which is passive 
and terminates in 75 ohms all unused ports.  I used 1/2 wave feed lines 
which conceivable repeats the 75 ohm termination at the Beverage 
matching transformer.  I also use several 1:1 (DXE) isolation boxes 
about 30 feet from several Beverages to reduces feedline pickup coupling 
back into the Beverage matching transformer.



On 6/8/2017 8:06 AM, Maciej Wieczorek wrote:

Hi Brad,

what I can say from my perspective - in the last 10 years I have tried 
both grounding and terminating through 75ohm resistor. With the 
terminating I see absolutely no pattern distortion on my Beverage's, 
which was not so obvious when direct grounding was used.


My Bev's often are crossed 45 deg, height is 1,8-2,0m.  I use only 
isolated transformers / separate windings.


73's
Mac SP2XF / SN2M

- Original Message - From: "Brad Denison" 


To: 
Sent: Thursday, June 08, 2017 1:54 PM
Subject: Topband: RX antenna switching - unused ports



All,

 I am working a homebrew RX antenna switch box for my beverages, 
flags and

shared apex loop array and am looking for design advice.  Can someone
educate me on the proper way to handle unused ports:

1)  Leave all unused ports open
2)  Ground all unused ports
3)  Terminate unused ports to 75 ohm


I have seen various commercially available switch boxes with all of 
these

configurations but it is not clear to me if any of these variations are
best, i.e does it matter?

Thanks,

Brad, W1NT
_
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Re: Topband: RX antenna switching - unused ports

[Maciej Wieczorek]

Hi Brad,

what I can say from my perspective - in the last 10 years I have tried both 
grounding and terminating through 75ohm resistor. With the terminating I see 
absolutely no pattern distortion on my Beverage's, which was not so obvious 
when direct grounding was used.


My Bev's often are crossed 45 deg, height is 1,8-2,0m.  I use only isolated 
transformers / separate windings.


73's
Mac SP2XF / SN2M

- Original Message - 
From: "Brad Denison" 

To: 
Sent: Thursday, June 08, 2017 1:54 PM
Subject: Topband: RX antenna switching - unused ports



All,

 I am working a homebrew RX antenna switch box for my beverages, flags and
shared apex loop array and am looking for design advice.  Can someone
educate me on the proper way to handle unused ports:

1)  Leave all unused ports open
2)  Ground all unused ports
3)  Terminate unused ports to 75 ohm


I have seen various commercially available switch boxes with all of these
configurations but it is not clear to me if any of these variations are
best, i.e does it matter?

Thanks,

Brad, W1NT
_
Topband Reflector Archives - http://www.contesting.com/_topband



_
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Re: Topband: RX antenna ???

[Douglas Ruz (CO8DM)]

I totally agree with you Steve...i will try the flag first without preamp 
and see how it play.


Actually, i will have a short coax run...about 30 or 40 ft...

73Douglas, CO8DM

"No creo que haya alguna emoción más intensa para un inventor que ver alguna 
de sus creaciones funcionando. Esa emoción hace que uno se olvide de comer, 
de dormir, de todo." - Nikola Tesla
- Original Message - 
From: 

To: "Top Band List List" 
Sent: Friday, August 28, 2015 8:03 PM
Subject: Re: Topband: RX antenna ???


Getting back to CO8DM's original question about a preamp to use with a flag. 
If the receiver noise level pops up and then drops when a receive antenna is 
connected and then disconnected, then it’s likely that a preamp may not be 
needed at all.


When I first played with a coaxial loop, a preamp was necessary. Since going 
to a full size flag, I find that I seldom even bother turning on a external 
preamp. I do have a relatively short coax run of about 75 ft from the flag 
to the receiver.


I’d try the flag first without building/buying a preamp and see how it 
plays.


Steve WB6RSE
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Re: Topband: RX antenna ???

[wb6rse1]

Getting back to CO8DM's original question about a preamp to use with a flag. If 
the receiver noise level pops up and then drops when a receive antenna is 
connected and then disconnected, then it’s likely that a preamp may not be 
needed at all.

When I first played with a coaxial loop, a preamp was necessary. Since going to 
a full size flag, I find that I seldom even bother turning on a external 
preamp. I do have a relatively short coax run of about 75 ft from the flag to 
the receiver.

I’d try the flag first without building/buying a preamp and see how it plays.

Steve WB6RSE
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Re: Topband: RX antenna ???

[K2RS]

For everyone who's looking for the W7IUV circuit and info . . .

Go to the following website for a company sells a W7IUV pre-amp kit 
(which I have no experience with) and click on the highlighted 
"Published Plans" link in the text to download the full .pdf file that 
used to be on W7IUV's website.


http://www.mtmscientific.com/preamp.html

HTH.

Jack  K2RS


On 8/28/2015 1:12 PM, Jeff Kincaid wrote:

Now that we've all retested the broken link, does anyone have a copy of the pdf?
'JK


  


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Re: Topband: RX antenna ???

[charlie-cunningham]

Google  W7IUV preamp and W7IUV Aplifier and you will get to it

 Jim Brown  wrote: 
> On Fri,8/28/2015 9:53 AM, Mike Waters wrote:
> > Go tohttp://w7iuv.com/  and click on "W7IUV preamp" in the left column.
> > That is a link to a PDF file, presently
> > http://w7iuv.com/preamp60/preamp_r60.pdf  
> 
> Both the pdf link and the "W7IUV preamp" link on his main page get me to 
> an Error 404 Page Not Found from qth.com
> 
> 73, Jim K9YC
> _
> Topband Reflector Archives - http://www.contesting.com/_topband

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Re: Topband: RX antenna ???

[Jim Brown]

On Fri,8/28/2015 9:53 AM, Mike Waters wrote:

Go tohttp://w7iuv.com/  and click on "W7IUV preamp" in the left column.
That is a link to a PDF file, presently
http://w7iuv.com/preamp60/preamp_r60.pdf  


Both the pdf link and the "W7IUV preamp" link on his main page get me to 
an Error 404 Page Not Found from qth.com


73, Jim K9YC
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Re: Topband: RX antenna ???

[wb6rse1]

Don’t know if this Rev 5 is the latest as Larry made some value changes over 
time.

‎www.mtmscientific.com/preamp.pdf

Steve WB6RSE


On Aug 28, 2015, at 10:12 AM, Jeff Kincaid  wrote:

Now that we've all retested the broken link, does anyone have a copy of the pdf?
'JK 

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Re: Topband: RX antenna ???

[Jeff Kincaid]

Now that we've all retested the broken link, does anyone have a copy of the pdf?
'JK 


 On Friday, August 28, 2015 4:53 PM, Mike Waters  wrote:
   

 Doug,

Go to http://w7iuv.com/ and click on "W7IUV preamp" in the left column.
That is a link to a PDF file, presently
http://w7iuv.com/preamp60/preamp_r60.pdf .

73, Mike
www.w0btu.com

On Fri, Aug 28, 2015 at 10:05 AM, Douglas M. Ruz Sobrado  wrote:

> ...i read about W7IUV preamp but i visited Larry´s website and i can not
> access to the preamp...any idea???
>
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Re: Topband: RX antenna ???

[Mike Waters]

Doug,

Go to http://w7iuv.com/ and click on "W7IUV preamp" in the left column.
That is a link to a PDF file, presently
http://w7iuv.com/preamp60/preamp_r60.pdf .

73, Mike
www.w0btu.com

On Fri, Aug 28, 2015 at 10:05 AM, Douglas M. Ruz Sobrado  wrote:

> ...i read about W7IUV preamp but i visited Larry´s website and i can not
> access to the preamp...any idea???
>
_
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Re: Topband: RX antenna ???

[Larry]

kitsandparts.com sells a kit of an amp of similar design as the W7IUV 
design. I have not used it personally. There are probably others around.


73, Larry  W6NWS

-Original Message- 
From: Douglas M. Ruz Sobrado

Sent: Friday, August 28, 2015 11:05 AM
To: Mike Waters
Cc: topband
Subject: Re: Topband: RX antenna ???

Hi everybody !!!,

Thank you very much for all the information and special THANKS to one friend 
that will help with Transformer and Terminator Resistor.


I need some information about Preamplifiers for flag anntenna now...i read 
about W7IUV preamp but i visited Larry´s website and i can not access to the 
preamp...any idea???


Thanks !!!,

73,

Doug, CO8DM
- Mensaje original -
De: Mike Waters 
Para: Douglas Ruz (CO8DM) 
CC: topband 
Enviado: Thu, 27 Aug 2015 19:42:02 -0400 (CDT)
Asunto: Re: Topband: RX antenna ???

www.w0btu.com/Beverage_antennas.html#Terminating_Resistors

73, Mike
www.w0btu.com

On Thu, Aug 27, 2015 at 11:37 AM, Douglas Ruz (CO8DM) 
wrote:



About the resistor: what kind of material???...carbon, right? and what
power will disipate the resistor ?



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Re: Topband: RX antenna ???

[Douglas M. Ruz Sobrado]

Hi everybody !!!,

Thank you very much for all the information and special THANKS to one friend 
that will help with Transformer and Terminator Resistor.

I need some information about Preamplifiers for flag anntenna now...i read 
about W7IUV preamp but i visited Larry´s website and i can not access to the 
preamp...any idea???

Thanks !!!,

73,

Doug, CO8DM
- Mensaje original -
De: Mike Waters 
Para: Douglas Ruz (CO8DM) 
CC: topband 
Enviado: Thu, 27 Aug 2015 19:42:02 -0400 (CDT)
Asunto: Re: Topband: RX antenna ???

www.w0btu.com/Beverage_antennas.html#Terminating_Resistors

73, Mike
www.w0btu.com

On Thu, Aug 27, 2015 at 11:37 AM, Douglas Ruz (CO8DM) 
wrote:

>
> About the resistor: what kind of material???...carbon, right? and what
> power will disipate the resistor ?
>

_
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Re: Topband: RX antenna ???

[Mike Waters]

www.w0btu.com/Beverage_antennas.html#Terminating_Resistors

73, Mike
www.w0btu.com

On Thu, Aug 27, 2015 at 11:37 AM, Douglas Ruz (CO8DM) 
wrote:

>
> About the resistor: what kind of material???...carbon, right? and what
> power will disipate the resistor ?
>
_
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Re: Topband: RX antenna ???

[Douglas Ruz (CO8DM)]

I have 2 more questions:

About the resistor: what kind of material???...carbon, right? and what power 
will disipate the resistor ?

The 2nd questions is about the transformer: i have some binocular and toroids 
but small ones, BN-43-202 and FT50-43...maybe adding few FT50-43 can "BUILD" 
some kind of larger binocular...any idea?

Thanks,

73Douglas, CO8DM

"No creo que haya alguna emoción más intensa para un inventor que ver alguna de 
sus creaciones funcionando. Esa emoción hace que uno se olvide de comer, de 
dormir, de todo." - Nikola Tesla
  - Original Message - 
  From: Tim Shoppa 
  To: Douglas Ruz (CO8DM) 
  Sent: Thursday, August 27, 2015 10:46 AM
  Subject: Re: Topband: RX antenna ???


  Any sort of loop you can put in, will be a superior receiving antenna to 
using your transmitting antenna.


  Most of the simple loops have a terminating resistor that is 400 to 1200 ohms 
depending on details.


  I use a K9AY loop. Different loops have different mounting and termination 
needs.



  Difference between 1000 ohms and 950 ohms for terminating resistor, is pretty 
inconsequential.


  Tim N3QE


  On Thu, Aug 27, 2015 at 10:13 AM, Douglas Ruz (CO8DM)  
wrote:

Hi,

I will install a vertical antenna for TX on 160, 80 and 40m.

I want build a Receiving antenna for those Low Bands.

I live in a city lot, so, i can not install beverages...i have been reading 
in the Low Band Dxing about Receiving Loops and i like the Rectangular loop 
developed by EA3VY and K6SE.

Anyway, i would like hear your ideas.

The Termination Resistor is 950 ohms in the design but i have 1000 carbon 
resistor...any idea??

Thanks,

73Douglas, CO8DM

"No creo que haya alguna emoción más intensa para un inventor que ver 
alguna de sus creaciones funcionando. Esa emoción hace que uno se olvide de 
comer, de dormir, de todo." - Nikola Tesla 
_
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Re: Topband: RX antenna ???

[N2TK, Tony]

You are correct.
Tony

-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Douglas
Ruz (CO8DM)
Sent: Thursday, August 27, 2015 10:32 AM
To: N2TK, Tony 
Cc: topband@contesting.com
Subject: Re: Topband: RX antenna ???

Thanks Tony,

I am using an old Yaesu, FT747...it is only one antenna connector on that
radio, so, i have to do a circuit for switching RX and TX antennas and also
a preamplifier for the flag antenna...right???

73Douglas, CO8DM

"No creo que haya alguna emoción más intensa para un inventor que ver alguna
de sus creaciones funcionando. Esa emoción hace que uno se olvide de comer,
de dormir, de todo." - Nikola Tesla
- Original Message -
From: "N2TK, Tony" 
To: "'Douglas Ruz (CO8DM)'" 
Sent: Thursday, August 27, 2015 10:27 AM
Subject: RE: Topband: RX antenna ???


Hi Douglas,
I use Flag and Pennant antennas. The most room OI have for a beverage is
300'. The Flag and Pennants were always better. Tried Ewe's, but they are
ground dependent.
1000 ohm should be close enough.

If the receive antenna is close to the transmit antenna you may need to have
a signal limiter on the receive input. Or maybe a fast acting relay to
ground the receive antenna when transmitting.

GL
N2TK, Tony

-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Douglas
Ruz (CO8DM)
Sent: Thursday, August 27, 2015 10:14 AM
To: topband@contesting.com
Subject: Topband: RX antenna ???

Hi,

I will install a vertical antenna for TX on 160, 80 and 40m.

I want build a Receiving antenna for those Low Bands.

I live in a city lot, so, i can not install beverages...i have been reading
in the Low Band Dxing about Receiving Loops and i like the Rectangular loop
developed by EA3VY and K6SE.

Anyway, i would like hear your ideas.

The Termination Resistor is 950 ohms in the design but i have 1000 carbon
resistor...any idea??

Thanks,

73Douglas, CO8DM

"No creo que haya alguna emoción más intensa para un inventor que ver alguna
de sus creaciones funcionando. Esa emoción hace que uno se olvide de comer,
de dormir, de todo." - Nikola Tesla

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Re: Topband: RX antenna ???

[Douglas Ruz (CO8DM)]

Thanks Tony,

I am using an old Yaesu, FT747...it is only one antenna connector on that 
radio, so, i have to do a circuit for switching RX and TX antennas and also 
a preamplifier for the flag antenna...right???


73Douglas, CO8DM

"No creo que haya alguna emoción más intensa para un inventor que ver alguna 
de sus creaciones funcionando. Esa emoción hace que uno se olvide de comer, 
de dormir, de todo." - Nikola Tesla
- Original Message - 
From: "N2TK, Tony" 

To: "'Douglas Ruz (CO8DM)'" 
Sent: Thursday, August 27, 2015 10:27 AM
Subject: RE: Topband: RX antenna ???


Hi Douglas,
I use Flag and Pennant antennas. The most room OI have for a beverage is
300'. The Flag and Pennants were always better. Tried Ewe's, but they are
ground dependent.
1000 ohm should be close enough.

If the receive antenna is close to the transmit antenna you may need to have
a signal limiter on the receive input. Or maybe a fast acting relay to
ground the receive antenna when transmitting.

GL
N2TK, Tony

-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Douglas
Ruz (CO8DM)
Sent: Thursday, August 27, 2015 10:14 AM
To: topband@contesting.com
Subject: Topband: RX antenna ???

Hi,

I will install a vertical antenna for TX on 160, 80 and 40m.

I want build a Receiving antenna for those Low Bands.

I live in a city lot, so, i can not install beverages...i have been reading
in the Low Band Dxing about Receiving Loops and i like the Rectangular loop
developed by EA3VY and K6SE.

Anyway, i would like hear your ideas.

The Termination Resistor is 950 ohms in the design but i have 1000 carbon
resistor...any idea??

Thanks,

73Douglas, CO8DM

"No creo que haya alguna emoción más intensa para un inventor que ver alguna
de sus creaciones funcionando. Esa emoción hace que uno se olvide de comer,
de dormir, de todo." - Nikola Tesla

_
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_
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Re: Topband: RX antenna pattern

[Tom W8JI]

Near field patterns have almost nothing to do with far field patterns, so 
that would be a great deal of walking and require a pretty sensitive 
instrument. To be in the area where the pattern is reasonably formed, a 
person would have to be at least a wavelength and at least 5-10 times the 
physical area of the antenna away from the antenna, whichever is greatest.


For example, my transmitting four square on 160 has not reasonably formed a 
consistent pattern until I am out about 2500 feet.  A small loop stabilizes 
at about a wavelength.


I'd expect the BOG  to approach the distance of the four square.

There are two reasons for this. One is the induction fields have not been 
fully dominated by the radiation field until near a wavelength for a very 
small antenna. The other reason is to form the pattern, the sense antenna 
and measured antenna have to be so far apart that all radiating areas of 
each antenna appear to originate from a single point in space.


If it doesn't look almost like a single point for both the sense and main 
antennas, the pattern won't be the actual pattern.


The way you get around this is to add a dielectric sheath in the model, like 
wire insulation, that slows the wave like ground would. Then, if you match 
the current levels and phase, you will pretty much get the correct pattern.


When I was working with slow wave antennas, I measured phase shift and 
currents and adjusted the model to match the antenna. If you do that, it 
doesn't matter if the wire is above earth in the model. It comes out a close 
match.


Otherwise, be prepared to drive a few miles while confirming pattern.  :)






- Original Message - 
From: "K1FZ-Bruce" 

To: "Topband" 
Sent: Wednesday, June 17, 2015 10:15 AM
Subject: Topband: RX antenna pattern





BOG antennas are difficult to model. Programs do not like wires on/under 
ground.. It is possible to find actual BOG, and Beverage patterns at 
ground level.


Feed a few watts of RF signal into the BOG/Beverage antenna. Use a 
portable SW receiver with S meter to walk around the antenna to take 
measurements and plot.



Hope you have friendly neighbors !

73
Bruce-K1FZ

www.qsl.net/k1fz/bogantennanotes/index.html

www.qsl.net/k1fz/beverage_antenna.html

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Re: Topband: RX antenna switching - multi-rig, multi antenna

[Tom W8JI]

For my system here, I have a multicoupler board already laid out that can be 
used for any number of antenna systems into four receivers. Because these 
are proto boards, they are a little pricey. They are a low quantity board.


Each antenna channel has about 6 dB loss from in to out for any receiver, so 
you would have to consider that. The advantages are it is passive magic T's, 
so it generates no measureable IMD. You can bridge all four receivers to one 
antenna, or to any antenna, independently. You never notice another receiver 
coming on line with existing receivers.


It can also be built out to bridge more than 4 receivers to any number of 
antennas.


In my system I amplify and equalize levels on all antennas, so I have TX 
antenna attenuated plus any number of RX antennas available.  I have seven 
RX antenna ports in right now plus TX antenna.  The three large Europe RX 
antennas are on dedicated ports, and the other four systems switch 
directions with a small control box.


It picks any of these antennas:
http://www.w8ji.com/images/W8JI%20site/w8jiantennas1S.jpg

73 Tom




- Original Message - 
From: "Jeff AC0C" 

To: "Tom W8JI" ; "Art Snapper" 
Cc: "160" 
Sent: Monday, April 20, 2015 11:58 PM
Subject: Topband: RX antenna switching - multi-rig, multi antenna


Art,s question has got me thinking about how the big multi-multi handle a 
bunch of receiving antennas routed to a bunch of stations?


Here I'm looking at up to 8 rx antennas fed to 4 stations.  But the more 
you dig into this, the more complicated it can get.  A crossbar-sort of 
switching arrangement would do the signal routing - but it would not 
provide any rig to rig isolation and would not maintain a constant Z 
(important if the rx amp is a norton type).


73/jeff/ac0c
www.ac0c.com
alpha-charlie-zero-charlie


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Re: Topband: RX antenna switching - multi-rig, multi antenna

[Jeff AC0C]

Thank you Frank.  1000' - wow.

What is the topology of the fanout (single antenna to 6 op positions); do 
you hang a MC splitter or similar off the back of the K8ZOA preamps?


I have looked at the K9AY So2r switch (forget what it's called - it has 2 
keypads) but wonder what is inside the box.  That had 8x2.  Is that what you 
are using there (6 sets of the 8x2 switch?) - or did he cook you up 
something custom?


73/jeff/ac0c
www.ac0c.com
alpha-charlie-zero-charlie

-Original Message- 
From: donov...@starpower.net

Sent: Tuesday, April 21, 2015 12:13 AM
To: 160
Subject: Re: Topband: RX antenna switching - multi-rig, multi antenna

Hi Jeff,


Here's how we handle receive antenna switching at W3LPL:


Six monoband receiving arrays are located 1000 feet southeast of the
transmit antennas. Each monoband receive array feeds a W3LPL
bandpass filter and a Clifton Labs Norton Preamplifier in the shack
except for 10 meters which uses a Clifton Labs Norton preamp at the
center of the 10 meter 4-square array.


160M 8-circle using W8JI 25 foot umbrella verticals
80M 8-circle using W8JI 25 foot umbrella verticals
40M 8-circle using W8JI 14 foot umbrella verticals
20M 4-square using 16 foot verticals
15M 4-square using 11 foot verticals
10M 4-square using 8 foot verticals


Three 580 foot Beverages (NE, S, W) are located 1000 feet from the
transmit antennas. Each Beverage feeds 160, 80 and 40 meter W3LPL
bandpass filters which then feeds three ARR preamps in the shack.

Two transceivers are used on each band, mostly Elecraft K-3s and Yaesu
FTdx5000s. K9AY receive antenna switches are used with the 160, 80
and 40 meter transceivers to allow all six operators to select one or more
receive antennas completely independent of all other operators. The
transmit antennas also feed the inputs to the K9AY switches. The only
restriction is that the monoband vertical receiving arrays can point in only
a single direction on each band, but the Beverages provide the capability
for the two operators on each band to receive in different directions.


73
Frank
W3LPL


- Original Message -

From: "Jeff AC0C" 
To: "Tom W8JI" , "Art Snapper" 
Cc: "160" 
Sent: Tuesday, April 21, 2015 3:58:45 AM
Subject: Topband: RX antenna switching - multi-rig, multi antenna

Art,s question has got me thinking about how the big multi-multi handle a
bunch of receiving antennas routed to a bunch of stations?

Here I'm looking at up to 8 rx antennas fed to 4 stations. But the more you
dig into this, the more complicated it can get. A crossbar-sort of
switching arrangement would do the signal routing - but it would not provide
any rig to rig isolation and would not maintain a constant Z (important if
the rx amp is a norton type).

73/jeff/ac0c
www.ac0c.com
alpha-charlie-zero-charlie


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Re: Topband: RX antenna switching - multi-rig, multi antenna

[donovanf]

Hi Jeff, 


Here's how we handle receive antenna switching at W3LPL: 


Six monoband receiving arrays are located 1000 feet southeast of the 
transmit antennas. Each monoband receive array feeds a W3LPL 
bandpass filter and a Clifton Labs Norton Preamplifier in the shack 
except for 10 meters which uses a Clifton Labs Norton preamp at the 
center of the 10 meter 4-square array. 


160M 8-circle using W8JI 25 foot umbrella verticals 
80M 8-circle using W8JI 25 foot umbrella verticals 
40M 8-circle using W8JI 14 foot umbrella verticals 
20M 4-square using 16 foot verticals 
15M 4-square using 11 foot verticals 
10M 4-square using 8 foot verticals 


Three 580 foot Beverages (NE, S, W) are located 1000 feet from the 
transmit antennas. Each Beverage feeds 160, 80 and 40 meter W3LPL 
bandpass filters which then feeds three ARR preamps in the shack. 

Two transceivers are used on each band, mostly Elecraft K-3s and Yaesu 
FTdx5000s. K9AY receive antenna switches are used with the 160, 80 
and 40 meter transceivers to allow all six operators to select one or more 
receive antennas completely independent of all other operators. The 
transmit antennas also feed the inputs to the K9AY switches. The only 
restriction is that the monoband vertical receiving arrays can point in only 
a single direction on each band, but the Beverages provide the capability 
for the two operators on each band to receive in different directions. 


73 
Frank 
W3LPL 


- Original Message -

From: "Jeff AC0C"  
To: "Tom W8JI" , "Art Snapper"  
Cc: "160"  
Sent: Tuesday, April 21, 2015 3:58:45 AM 
Subject: Topband: RX antenna switching - multi-rig, multi antenna 

Art,s question has got me thinking about how the big multi-multi handle a 
bunch of receiving antennas routed to a bunch of stations? 

Here I'm looking at up to 8 rx antennas fed to 4 stations. But the more you 
dig into this, the more complicated it can get. A crossbar-sort of 
switching arrangement would do the signal routing - but it would not provide 
any rig to rig isolation and would not maintain a constant Z (important if 
the rx amp is a norton type). 

73/jeff/ac0c 
www.ac0c.com 
alpha-charlie-zero-charlie 


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Re: Topband: RX Antenna Switch

[Ron Feutz]

Fantastic product.  I have one of Gary's first prototypes.  Survived a 
mangling by whomever shipped it home from a DXped and worked FB, still does. 
Much better than a rotary switch for your RX antennas.


Ron KK9K


-Original Message- 
From: j...@kk9a.com

Sent: Friday, November 21, 2014 8:54 PM
To: topband@contesting.com
Subject: Re: Topband: RX Antenna Switch

Gary,

It will be great to see some of your other products again. I have owned a
RAS-8x2 for a number of years. It makes switching Beverage antennas so easy
plus it has a preamp. I put mine to good use in last weekend's Sweepstakes
contest.

GL,
John KK9A


From: "K9AY" 
Reply-to: K9AY 
Date: Fri, 21 Nov 2014 09:04:51 -0600

I recently delivered several RAS-8x2 Receive Antenna Switch units to
customers
and made some extras -- I have three units boxed and ready to ship. Two with

UHF connectors, the other with F connectors. E-mail me at:
gary(at)aytechnologies(dot)com

And I am getting ready to make more of my past products and a few new ones.
I've been making a few all along by request, but not advertising. Not ready
with everything right now, but keep an eye on my web site
www.aytechnologies.com

I know this is a commercial message, but my 'manufacturing' isn't much of a
business -- it's tiny, specialized, and I do it mostly for fun!

73, Gary
K9AY

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Re: Topband: RX Antenna Switch

[john]

Gary,

It will be great to see some of your other products again. I have owned a
RAS-8x2 for a number of years. It makes switching Beverage antennas so easy
plus it has a preamp. I put mine to good use in last weekend's Sweepstakes
contest.

GL,
John KK9A


From:   "K9AY" 
Reply-to:   K9AY 
Date:   Fri, 21 Nov 2014 09:04:51 -0600

I recently delivered several RAS-8x2 Receive Antenna Switch units to
customers 
and made some extras -- I have three units boxed and ready to ship. Two with

UHF connectors, the other with F connectors. E-mail me at: 
gary(at)aytechnologies(dot)com 

And I am getting ready to make more of my past products and a few new ones. 
I've been making a few all along by request, but not advertising. Not ready 
with everything right now, but keep an eye on my web site
www.aytechnologies.com

I know this is a commercial message, but my 'manufacturing' isn't much of a 
business -- it's tiny, specialized, and I do it mostly for fun! 

73, Gary
K9AY

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

Re: Topband: RX Antenna Switch

[Doug Renwick]

I would not care if it was a business advertising.  No need to apologize.
If I didn't want to read it, I would use my Delete key.

Doug

I wasn't born in Saskatchewan, but I got here as soon as I could.

-Original Message-

I recently delivered several RAS-8x2 Receive Antenna Switch units to
customers and made some extras -- I have three units boxed and ready to
ship. Two with UHF connectors, the other with F connectors. E-mail me at:
gary(at)aytechnologies(dot)com 

And I am getting ready to make more of my past products and a few new ones.
I've been making a few all along by request, but not advertising. Not ready
with everything right now, but keep an eye on my web site
www.aytechnologies.com

I know this is a commercial message, but my 'manufacturing' isn't much of a
business -- it's tiny, specialized, and I do it mostly for fun! 

73, Gary
K9AY


---
This email is free from viruses and malware because avast! Antivirus protection 
is active.
http://www.avast.com

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

Re: Topband: RX antenna transformer winding

[Charlie Cunningham]

I've also had very good results using wire-wrap wire for winding small RF
transformers. Pretty easy to work with - and it's rugged.

Charlie, K4OTV

-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of
mstang...@comcast.net
Sent: Wednesday, August 21, 2013 2:01 PM
To: topband@contesting.com
Subject: Re: Topband: RX antenna transformer winding

I use wire wrap wire when winding small cores. The Kynar insulation is tough
and resists nicking.

<http://www.jameco.com/webapp/wcs/stores/servlet/StoreCatalogDrillDownView?l
angId=-1&storeId=10001&catalogId=10001&search_type=jamecoall&freeText=wire+w
rap+wire>

OT: Wire wrapping was very popular in the 60's and the 70's before the
advent of multilayer printed circuit boards.

It was very reliable. The backplane of the Apollo Guidance Compluter was
connected via wire wrap. You can see an example at the Infor Age Museum in
Wall, NJ.

<http://w2dtc.com/2011-0522-infoage/2011-0522-0061.jpg>

Mike N2MS
_
Topband Reflector

_
Topband Reflector

Re: Topband: RX antenna transformer winding

[mstangelo]

I use wire wrap wire when winding small cores. The Kynar insulation is tough 
and resists nicking.



OT: Wire wrapping was very popular in the 60's and the 70's before the advent 
of multilayer printed circuit boards.

It was very reliable. The backplane of the Apollo Guidance Compluter was 
connected via wire wrap. You can see an example at the Infor Age Museum in 
Wall, NJ.



Mike N2MS
_
Topband Reflector

Re: Topband: RX antenna transformer winding

[Don Kirk]

I've been using Radio Shack 30 AWG insulated wire (wire wrap wire) to wind
my binocular cores for RX antennas.  It comes in 50 foot spools, and you
can buy it in Blue, Red, or White.  This insulated wire has made winding of
my binocular cores a real pleasure.  No more worries about scratching the
enamel coating on the magnet wire that used to drive me nuts, and no more
messing around removing the enamel coating on the ends (I just use normal
cheap wire strippers to remove the insulation on the ends of the wires for
connection purposes).  Have never had problems using this wire without the
use of plastic/teflon sleeves (but I was also not attempting to keep the
primary and secondary turns separate (using sleeves) for purposes of
reduced capacitance between the windings in my applications)

Here are the Radio Shack part numbers for the wire I use :
Red : 278-501
White : 278-502
Blue : 278-503

Cost is $5.49 per spool.

73,
Don





On Wed, Aug 21, 2013 at 12:46 PM, George Dubovsky  wrote:

> I have used plastic coffee stirrers from the fast food joints; they start
> out smaller and they cost the same... ;-)
>
> 73,
>
> geo - n4ua
>
>
> On Wed, Aug 21, 2013 at 11:48 AM,  wrote:
>
> > From recent postings:
> >
> > > I started using Teflon sleeves in windings because I ran out of small
> > Teflon
> > wire wrap wire I was using. Without Teflon on the wires, and with normal
> > mag
> > wire, the enamel was easily scratched. Not only that, lightning would
> > punch
> > through from enamel to core, or from wire to wire.
> >
> > ** Telon is easily nicked, the type of wire used in modern vehicles is
> > very
> > robust but with the sleeves plain ole magnet wire works well and allows
> > even
> > smaller winding bundles.
> >
> >
> > RE: binocular cores and sleeving
> > I didn't have the right size of Teflon sleeves in my junque drawer, so I
> > cut
> > appropriate lengths of used soda straws from McD's, slit them lengthwise,
> > then cut off the excess (lengthwise).  Then I curled the cut straw
> > sections
> > and pushed them through the cores.  The result is a near perfect fit
> > with a slight overlap at the lengthwise cuts.  The overlaps can
> > be oriented toward the "outside" of the core so the wire won't
> > have a tendancy to open up the overlap.
> >
> > 73,
> > Charlie, N0TT
> > _
> > Topband Reflector
> >
> _
> Topband Reflector
>
_
Topband Reflector

Re: Topband: RX antenna transformer winding

[George Dubovsky]

I have used plastic coffee stirrers from the fast food joints; they start
out smaller and they cost the same... ;-)

73,

geo - n4ua


On Wed, Aug 21, 2013 at 11:48 AM,  wrote:

> From recent postings:
>
> > I started using Teflon sleeves in windings because I ran out of small
> Teflon
> wire wrap wire I was using. Without Teflon on the wires, and with normal
> mag
> wire, the enamel was easily scratched. Not only that, lightning would
> punch
> through from enamel to core, or from wire to wire.
>
> ** Telon is easily nicked, the type of wire used in modern vehicles is
> very
> robust but with the sleeves plain ole magnet wire works well and allows
> even
> smaller winding bundles.
>
>
> RE: binocular cores and sleeving
> I didn't have the right size of Teflon sleeves in my junque drawer, so I
> cut
> appropriate lengths of used soda straws from McD's, slit them lengthwise,
> then cut off the excess (lengthwise).  Then I curled the cut straw
> sections
> and pushed them through the cores.  The result is a near perfect fit
> with a slight overlap at the lengthwise cuts.  The overlaps can
> be oriented toward the "outside" of the core so the wire won't
> have a tendancy to open up the overlap.
>
> 73,
> Charlie, N0TT
> _
> Topband Reflector
>
_
Topband Reflector

Re: Topband: RX antenna transformer winding

[n0tt1]

>From recent postings:

> I started using Teflon sleeves in windings because I ran out of small
Teflon 
wire wrap wire I was using. Without Teflon on the wires, and with normal
mag 
wire, the enamel was easily scratched. Not only that, lightning would
punch 
through from enamel to core, or from wire to wire.

** Telon is easily nicked, the type of wire used in modern vehicles is
very 
robust but with the sleeves plain ole magnet wire works well and allows
even 
smaller winding bundles.


RE: binocular cores and sleeving
I didn't have the right size of Teflon sleeves in my junque drawer, so I
cut
appropriate lengths of used soda straws from McD's, slit them lengthwise,
then cut off the excess (lengthwise).  Then I curled the cut straw
sections
and pushed them through the cores.  The result is a near perfect fit
with a slight overlap at the lengthwise cuts.  The overlaps can
be oriented toward the "outside" of the core so the wire won't 
have a tendancy to open up the overlap.

73,
Charlie, N0TT 
_
Topband Reflector

Re: Topband: RX antenna transformer winding (pure resistancetransformation issues)

[Jim Brown]

On 8/20/2013 2:49 PM, ZR wrote:
Many Topband operators use their Beverages above 2 MHz. 


Yep. I use them extensively on 30, 40, and 80, and occasionally on 20. 
I've also used them on the AM broadcast band.


73, Jim K9YC
_
Topband Reflector

Re: Topband: RX antenna transformer winding (pure resistancetransformation issues)

[ZR]

- Original Message - 
From: "Tom W8JI" 

To: "topband" 
Sent: Tuesday, August 20, 2013 4:00 PM
Subject: Re: Topband: RX antenna transformer winding (pure 
resistancetransformation issues)





Unless you have a system with pretty high common mode impedances, winding
spacing means nothing.

** Contrary to what you have stated elsewhere


The primary reason I (and DXE) isolate windings with
Teflon tubes is to reduce lighting damage, and to greatly reduce assembly
damage. If the system has pretty high common mode impedances there might be
some small advantage in pushing windings apart, but the primary-secondary
capacitance is never going to be important in Beverages or other low or
modest common mode impedance antennas. Balancing a small loop might be an
issue.

** Common mode is an overworked response for perceived ailments.
I took your low capacitance suggestions a step further after carefully 
measuring C and frequency response for maintaining high directivity and F/B. 
Many Topband operators use their Beverages above 2 MHz.



I started using Teflon sleeves in windings because I ran out of small Teflon
wire wrap wire I was using. Without Teflon on the wires, and with normal mag
wire, the enamel was easily scratched. Not only that, lightning would punch
through from enamel to core, or from wire to wire.

** Telon is easily nicked, the type of wire used in modern vehicles is very 
robust but with the sleeves plain ole magnet wire works well and allows even 
smaller winding bundles.
Since I was more interested in performance rather than production problems I 
took the time to evaluate a large number of variations.


Carl
KM1H


_
Topband Reflector

Re: Topband: RX antenna transformer winding (pure resistance transformation issues)

[Jim Brown]

On 8/20/2013 1:00 PM, Tom W8JI wrote:
By squeezing or spreading turns to change mutual coupling between 
turns, a T157-2 core can have almost 2:1 impedance shift! That tells 
us it has considerable flux leakage. 


So-called "self-shielding" and it's inverse,  leakage flux, also depend 
on permeability, which in turn depends on the material and the frequency 
of interest. Fair-Rite data sheets for their materials clearly show the 
variation of permeability with frequency.


And when we squeeze or spread turns we are also changing stray C of the 
winding.


73, Jim K9YC
_
Topband Reflector

Re: Topband: RX antenna transformer winding (pure resistancetransformation issues)

[Tom W8JI]

Unless you have a system with pretty high common mode impedances, winding
spacing means nothing.

** Contrary to what you have stated elsewhere


Where? Please quote it in enough context to see the meaning. I'll certainly 
clairfy it or correct it if possible, because I don't want to mislead 
anyone.


_
Topband Reflector

Re: Topband: RX antenna transformer winding (pure resistance transformation issues)

[Mike Waters]

On Tue, Aug 20, 2013 at 3:00 PM, Tom W8JI  wrote:

>  The ARRL in some publications, for example, teaches us toroids are
> "self-shielding". In fact, many toroidal cores have significant flux
> leakage.
>

That is for sure. I was following a thread in an SWL or AM BCB group a few
months ago, where someone (right or wrong) was recommending a toroid as an
antenna in lieu of a ferrite rod with wire wrapped on it. The point is that
the toroid was evidently doing a fair job of picking up signals! If it were
self-shielding, that wouldn't happen.


There is a great deal of stuff going on in a transformer.
>

You said a mouthful. I sure wish I understood more about that subject. I
wrote Fair-Rite for some info over a year ago and they never replied. (for
whatever reason). I need to learn some more basics that I don't presently
understand.

73, Mike
www.w0btu.com
_
Topband Reflector

Re: Topband: RX antenna transformer winding (pure resistance transformation issues)

[Tom W8JI]

I had additional offline conversations with Rick (N6RK), and Carl (KM1H),
and below is my official response to my original post about RX antenna
transformer windings and complex impedance measured on the primary side of
the transformer depending on how they are wound.


There are several things that cause the issue you noticed, and one of them 
is core magnetic path length and leakage. The ARRL in some publications, for 
example, teaches us toroids are "self-shielding". In fact, many toroidal 
cores have significant flux leakage. By squeezing or spreading turns to 
change mutual coupling between turns, a T157-2 core can have almost 2:1 
impedance shift! That tells us it has considerable flux leakage.


The primary issues, however, are the generally "impure" magnetic properties 
of very high permeability cores. If we tightly wound a single winding on the 
core and measured the impedance, we would find it is not a pure lossless 
reactance. These impure impedances modify the impedances seen through the 
transformer.


There is a great deal of stuff going on in a transformer.

Unless you have a system with pretty high common mode impedances, winding 
spacing means nothing. The primary reason I (and DXE) isolate windings with 
Teflon tubes is to reduce lighting damage, and to greatly reduce assembly 
damage. If the system has pretty high common mode impedances there might be 
some small advantage in pushing windings apart, but the primary-secondary 
capacitance is never going to be important in Beverages or other low or 
modest common mode impedance antennas. Balancing a small loop might be an 
issue.


I started using Teflon sleeves in windings because I ran out of small Teflon 
wire wrap wire I was using. Without Teflon on the wires, and with normal mag 
wire, the enamel was easily scratched. Not only that, lightning would punch 
through from enamel to core, or from wire to wire.


I'm glad the isolated primary transformers took over from the 
auto-transformers that were so common, but I think the need for low 
capacitance is being a bit overplayed in the vast majority of cases.


73 Tom





_
Topband Reflector

Re: Topband: RX antenna transformer winding (pure resistance transformation issues)

[Jim Brown]

On 8/20/2013 11:31 AM, Don Kirk wrote:

But I saw the complex impedance phenomena even with smaller diameter cores
(using different grade of material), and here is my actual FT 50-43 data as
an example.


One missing piece in understanding what you're seeing is the fact that 
mu (permeability) is a complex number, u' +ju'', where u' represents the 
inductive component and u'' represents the loss component for series 
equivalent circuit elements.  Here's a link to the Fair-Rite data sheet 
for #43 material.


http://www.fair-rite.com/newfair/materials43.htm

Note that at 2 MHz, u' is about 800 and u'' is about 180.  The fact that 
mu is complex means that coupling between the windings will have phase 
shift! Not only that, but loss in the core is coupled into the winding 
as resistance, which, because it is magnetically coupled, is multiplied 
by the square of the turns.


Here's a link to the listing of all their materials, with links to 
corresponding data sheets for each.


http://www.fair-rite.com/newfair/materials.htm

73, Jim K9YC

_
Topband Reflector

Re: Topband: RX antenna transformer winding (pure resistance transformation issues)

[Mike Waters]

If I can add my $0.02 worth here...

I have never found a better ferrite core for RX antenna transformers than
the Amidon BN-73-202 (Fair-Rite 2873000202). I also used to use
side-by-side stacked ferrite beads (eight FB-73-202 in two tight stacks of
4) to make "binocular cores", but that never worked as well. I immediately
noticed an improvement in the performance of my Beverages when I switched
to those little multi-aperture 2873000202 cores. Newark/Element 14 has
those Fair-rite cores cheep.

73, Mike
www.w0btu.com

On Tue, Aug 20, 2013 at 1:31 PM, Don Kirk  wrote:

>
> When I used two FT50-43 cores configured to make a binocular core, ...
>
>
_
Topband Reflector

Re: Topband: RX antenna transformer winding (pure resistance transformation issues)

[Don Kirk]

I had additional offline conversations with Rick (N6RK), and Carl (KM1H),
and below is my official response to my original post about RX antenna
transformer windings and complex impedance measured on the primary side of
the transformer depending on how they are wound.

Rick N6RK said

> The way out of this dilemma is to use a smaller toroid core than the 1.14
inch diameter core you currently have.

But I saw the complex impedance phenomena even with smaller diameter cores
(using different grade of material), and here is my actual FT 50-43 data as
an example.

FT50-43 measured data as follows (windings on opposite side of the core
from each other) :
Pri = 5 T, Sec = 20 T, 1K load resistor
R= 42, X = 25, 1.8 Mhz, Capacitance = 5 pf
R= 51, X = 24, 3.5 Mhz
R= 57, X = 32, 7 Mhz

When I used two FT50-43 cores configured to make a binocular core, I
obtained the following results :
Pri = 3 T, Sec = 12 T, 1K load resistor
R= 38, X = 21, 1.8 Mhz
R= 50, X = 1, 3.5 Mhz
R= 52, X = 0, 7 Mhz

Rick also said :
> the small amount of leakage inductance you are seeing even with the large
core with separated windings is nothing to worry about.

I agree with this unless you are trying to phase RX antennas, and then the
complex impedance becomes a critical factor to deal with, and that's why I
feel it's important to understand (know) that this phenomena exists.

Rick also said :
> I would rather tolerate that and get the benefit of the reduced
capacitance from winding to winding.

Appears everyone agrees that a very low capacitance between windings
(between primary and secondary winding) is near (if not at the very the
top) of the list of desired properties of the RX antenna transformer.  This
is also supported by statements in the ON4UN Low-Band DXing book.

Carl (KM1H) goes to great lengths to reduce the capacitance between
windings on the binocular cores that he uses on his RX antennas per his
following statement : "Teflon tubes for each winding and that brought the C
way down by compressing each winding in the smallest tube that I could get
the wires thru and then forcing a toothpick thru to force the most
separation."

Thanks to Rick and Carl for the technical discussions we had.

73,
Don Kirk (wd8dsb)
_
Topband Reflector

Re: Topband: RX antenna transformer winding (pure resistance transformation issues)

[Richard (Rick) Karlquist]

On 8/16/2013 8:06 AM, Don Kirk wrote:


discussions included material type, and style (toroid vs. binocular), but I
found no mention about problems regarding the use of conventional toroid
cores in which a pure resistive load on the secondary appears to be a
complex impedance (resistance and inductance) on the primary side of the


The way out of this dilemma is to use a smaller toroid core than
the 1.14 inch diameter core you currently have.  This is a
RECEIVING antenna after all.  What you are seeing is leakage inductance.
The leakage inductance should scale linearly with core diameter.
The capacitance should also scale.

Having said that, the small amount of leakage inductance you are
seeing even with the large core with separated windings is
nothing to worry about.  I would rather tolerate that and get
the benefit of the reduced capacitance from winding to winding.

Rick N6RK
_
Topband Reflector

Re: Topband: RX Antenna advice

[ct1ilt]

Hi everyone,

Well it looks like Jesus EC1KR was right, the conditions were very  
strange and I couldnt hear the pile up calling me but I could hear USA  
just fine.

Anyhow, good thing that the antennas are still working good.

73's and cu everyone in ARRL DX SSB as CR6K
CT1ILT Filipe Lopes



Citando Jesus EC1KR :

> Hi all.
>
> Filipe we had the same problem during last CQ 160M SSB in our Team ED1R
> located in central Spain, when many EU stations calling us and we not listen
> clear his signals. A friend out of the Contest in EA4 informed us that he
> listen on Internet from a SDR in HB9 who many stations calling us and from
> each 3 or 4 stations that calling us we only copy 1, and with many problems,
> and always saying few times Again, Again, Again :-(
>
> We used a Vertical T Inv. with 100 radials and RX Beverages Antenas EU, NA,
> OC and SA from 180m aprox. Each one.
>
> Is very strange because we copy very clear many NA stations and they not
> copy us, we calling big times to many stations in NA and we worked only 30
> or 35 stations aprox. They was working NA-NA only and not listen EU
> callings. For other part in EU beverages the noisy was very strong, constant
> and a big problem to listen LP/QRP stations in EU.
>
> We have very near a electric tower in EU beverage direction probably was the
> problem, but in other contest we haven’t this problem, and we think also
> that our problem is that our beverages are very short (only 180m aprox.) and
> we need to have 300m aprox. Or the 3º option is that we had very poor
> conditions in EA1-EA4/CT during last CQ 160M SSB.
>
> 73 to all and see you During next contest.
>
> 73 de Jesus EC1KR (ED1R)
> Blog. www.ec1kr.com
>
>
>
> -Mensaje original-
> De: topband-boun...@contesting.com [mailto:topband-boun...@contesting.com]
> En nombre de ct1...@sapo.pt
> Enviado el: lunes, 27 de febrero de 2012 15:41
> Para: topband@contesting.com
> Asunto: Topband: RX Antenna advice
>
> Hi everyone,
>
> This past weekend I made a few CQs on 160m in the CQ 160 Contest and
> while talking to my friend Braco E77DX he told me that I was not
> hearing well, I had huge pile up coming from Europe but I could not
> hear a single soul calling. I tried all the antennas available (110m
> beverage to 10º, 130m beverage to 45º/225º not terminated) and even
> with the TX antennas (T Vertical and Dipole) I could not hear anyone,
> the maximum signal I got was with the W6 Beverage (170m).
>
> I conclude that somehow my RX antennas are not working properly
> towards Europe, could it be that the beverages to europe doesnt work
> well running up the mountain? West Beverage work very well but the
> terrain is either sloping to USA or flat.
>
>
> My question is weather should I give a try on another type of RX
> antenna just for Europe / ASIA? G3XGC Coaxial Loop ? pennant?
>
> Any advice would be welcome.
>
> Thanks
> Filipe Lopes CT1ILT aka CR6K
>
>
> ___
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>
> ___
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>

___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX Antenna advice

[Gregg Marco W6IZT]

I use a 450 ft terminated beverage that follows the terrain and slopes
downhill by about 50 ft. Seems to work well, but I have nothing to compare
it too.

73
Gregg
W6IZT

-Original Message-
From: topband-boun...@contesting.com [mailto:topband-boun...@contesting.com]
On Behalf Of Guy Olinger K2AV
Sent: Monday, February 27, 2012 11:35 AM
To: ct1...@sapo.pt
Cc: topband@contesting.com
Subject: Re: Topband: RX Antenna advice

Beverage antenna running up the mountain to intended direction does not
inspire confidence for some number of reasons.  What kind of soil is
underneath it?

Pennant, K9AY, or an array of same, something that rejects back and side,
and hears high angle well would seem better suited. Maybe Waller Flag?

73, Guy.

On Mon, Feb 27, 2012 at 9:41 AM,  wrote:

> Hi everyone,
>
> This past weekend I made a few CQs on 160m in the CQ 160 Contest and
> while talking to my friend Braco E77DX he told me that I was not
> hearing well, I had huge pile up coming from Europe but I could not
> hear a single soul calling. I tried all the antennas available (110m
> beverage to 10º, 130m beverage to 45º/225º not terminated) and even
> with the TX antennas (T Vertical and Dipole) I could not hear anyone,
> the maximum signal I got was with the W6 Beverage (170m).
>
> I conclude that somehow my RX antennas are not working properly
> towards Europe, could it be that the beverages to europe doesnt work
> well running up the mountain? West Beverage work very well but the
> terrain is either sloping to USA or flat.
>
>
> My question is weather should I give a try on another type of RX
> antenna just for Europe / ASIA? G3XGC Coaxial Loop ? pennant?
>
> Any advice would be welcome.
>
> Thanks
> Filipe Lopes CT1ILT aka CR6K
>
>
> ___
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>
___
UR RST IS ... ... ..9 QSB QSB - hw? BK

___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX Antenna advice

[Jesus EC1KR]

Hi all.

Filipe we had the same problem during last CQ 160M SSB in our Team ED1R
located in central Spain, when many EU stations calling us and we not listen
clear his signals. A friend out of the Contest in EA4 informed us that he
listen on Internet from a SDR in HB9 who many stations calling us and from
each 3 or 4 stations that calling us we only copy 1, and with many problems,
and always saying few times Again, Again, Again :-(

We used a Vertical T Inv. with 100 radials and RX Beverages Antenas EU, NA,
OC and SA from 180m aprox. Each one.

Is very strange because we copy very clear many NA stations and they not
copy us, we calling big times to many stations in NA and we worked only 30
or 35 stations aprox. They was working NA-NA only and not listen EU
callings. For other part in EU beverages the noisy was very strong, constant
and a big problem to listen LP/QRP stations in EU.

We have very near a electric tower in EU beverage direction probably was the
problem, but in other contest we haven’t this problem, and we think also
that our problem is that our beverages are very short (only 180m aprox.) and
we need to have 300m aprox. Or the 3º option is that we had very poor
conditions in EA1-EA4/CT during last CQ 160M SSB.

73 to all and see you During next contest. 
 
73 de Jesus EC1KR (ED1R)
Blog. www.ec1kr.com
 
 

-Mensaje original-
De: topband-boun...@contesting.com [mailto:topband-boun...@contesting.com]
En nombre de ct1...@sapo.pt
Enviado el: lunes, 27 de febrero de 2012 15:41
Para: topband@contesting.com
Asunto: Topband: RX Antenna advice

Hi everyone,

This past weekend I made a few CQs on 160m in the CQ 160 Contest and  
while talking to my friend Braco E77DX he told me that I was not  
hearing well, I had huge pile up coming from Europe but I could not  
hear a single soul calling. I tried all the antennas available (110m  
beverage to 10º, 130m beverage to 45º/225º not terminated) and even  
with the TX antennas (T Vertical and Dipole) I could not hear anyone,  
the maximum signal I got was with the W6 Beverage (170m).

I conclude that somehow my RX antennas are not working properly  
towards Europe, could it be that the beverages to europe doesnt work  
well running up the mountain? West Beverage work very well but the  
terrain is either sloping to USA or flat.


My question is weather should I give a try on another type of RX  
antenna just for Europe / ASIA? G3XGC Coaxial Loop ? pennant?

Any advice would be welcome.

Thanks
Filipe Lopes CT1ILT aka CR6K


___
UR RST IS ... ... ..9 QSB QSB - hw? BK

___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX Antenna advice

[Mike Waters]

Is this a new Beverage antenna, and can you tell us more about it? How are
you feeding and grounding it?

How steep is the mountain? I've heard of some Beverages running up and/or
down some pretty steep slopes that still work fine.

73, Mike
www.w0btu.com/Beverage_antennas.html

On Mon, Feb 27, 2012 at 8:41 AM,  wrote:

> I conclude that somehow my RX antennas are not working properly towards
> Europe, could it be that the beverages to europe doesnt work well running
> up the mountain?
>
___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX Antenna advice

[ct1ilt]

Hi Guy,

thanks for answer, the soil is pretty bad. Very dry, rocky soil.

Filipe


Citando Guy Olinger K2AV :

> Beverage antenna running up the mountain to intended direction does not
> inspire confidence for some number of reasons.  What kind of soil is
> underneath it?
>
> Pennant, K9AY, or an array of same, something that rejects back and side,
> and hears high angle well would seem better suited. Maybe Waller Flag?
>
> 73, Guy.
>
> On Mon, Feb 27, 2012 at 9:41 AM,  wrote:
>
>> Hi everyone,
>>
>> This past weekend I made a few CQs on 160m in the CQ 160 Contest and
>> while talking to my friend Braco E77DX he told me that I was not
>> hearing well, I had huge pile up coming from Europe but I could not
>> hear a single soul calling. I tried all the antennas available (110m
>> beverage to 10º, 130m beverage to 45º/225º not terminated) and even
>> with the TX antennas (T Vertical and Dipole) I could not hear anyone,
>> the maximum signal I got was with the W6 Beverage (170m).
>>
>> I conclude that somehow my RX antennas are not working properly
>> towards Europe, could it be that the beverages to europe doesnt work
>> well running up the mountain? West Beverage work very well but the
>> terrain is either sloping to USA or flat.
>>
>>
>> My question is weather should I give a try on another type of RX
>> antenna just for Europe / ASIA? G3XGC Coaxial Loop ? pennant?
>>
>> Any advice would be welcome.
>>
>> Thanks
>> Filipe Lopes CT1ILT aka CR6K
>>
>>
>> ___
>> UR RST IS ... ... ..9 QSB QSB - hw? BK
>>
> ___
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>

___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX Antenna advice

[Guy Olinger K2AV]

Beverage antenna running up the mountain to intended direction does not
inspire confidence for some number of reasons.  What kind of soil is
underneath it?

Pennant, K9AY, or an array of same, something that rejects back and side,
and hears high angle well would seem better suited. Maybe Waller Flag?

73, Guy.

On Mon, Feb 27, 2012 at 9:41 AM,  wrote:

> Hi everyone,
>
> This past weekend I made a few CQs on 160m in the CQ 160 Contest and
> while talking to my friend Braco E77DX he told me that I was not
> hearing well, I had huge pile up coming from Europe but I could not
> hear a single soul calling. I tried all the antennas available (110m
> beverage to 10º, 130m beverage to 45º/225º not terminated) and even
> with the TX antennas (T Vertical and Dipole) I could not hear anyone,
> the maximum signal I got was with the W6 Beverage (170m).
>
> I conclude that somehow my RX antennas are not working properly
> towards Europe, could it be that the beverages to europe doesnt work
> well running up the mountain? West Beverage work very well but the
> terrain is either sloping to USA or flat.
>
>
> My question is weather should I give a try on another type of RX
> antenna just for Europe / ASIA? G3XGC Coaxial Loop ? pennant?
>
> Any advice would be welcome.
>
> Thanks
> Filipe Lopes CT1ILT aka CR6K
>
>
> ___
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>
___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX antenna switch

[ZR]

Ive found that it is sometimes beneficial to be able select more than one 
Beverage at a time especially in a contest or during fluctuating skewed path 
conditions.

Carl
KM1H


- Original Message - 
From: "Joe Subich, W4TV" 
To: "Dave G4GED" ; "[Topband]" 

Sent: Friday, December 30, 2011 4:00 PM
Subject: Re: Topband: RX antenna switch


>
> Interlocked switches should not be necessary for receive applications.
> If by interlocked you're looking for a way to deselect one antenna
> when selecting the next, check K1TTT's web site.  Dave had a push
> button controller that would release previously selected antennas
> when making a new selection.  I haven't looked for it recently so you
> may need to do some digging.
>
> 73,
>
>... Joe, W4TV
>
>
> On 12/30/2011 3:27 PM, Dave G4GED wrote:
>> - Original Message -
>> From: "Brian Moran"
>> Here's one that works for TX&  Rx.
>> http://www.qsl.net/k5lxp/projects/CoaxSwitch/CoaxSwitch.html With 
>> lockout,
>> etc. A homebrew version of the '6 pack' kind of box from array solutions. 
>> I
>> have the Array Solutions one, and it works great.
>> - Brian N9ADG
>> 
>>
>> Thanks Brian for the submission which I'm sure admirably suits selection 
>> of
>> TX/RX  antennas perhaps for selection of different bands etc.
>> If I've read it correctly, the antennas are selected by rotary switches.
>> The primary need for selection of RX antennas on TopBand is to be able to
>> switch from any one to any other instantly without the tedium and 
>> confusion
>> of having to spin a rotary switch back and forth whilst trying to find 
>> best
>> copy out of an extreemly weak signal down in the noise.
>> A matrix of "quiet" interlocked push button switches would be ideal, 
>> which
>> require just one push to instantly change from any one antenna to any 
>> other.
>> Unfortunately, they're not easy to come by these days which is why I'm
>> thinking of a relay based solution. There's undoubtably software 
>> solutions
>> available to do this but I'm afraid that's out of my league, unless 
>> someone
>> here can pull a design out ready made for DIY!
>> Cheers Dave
>>
>> ___
>> UR RST IS ... ... ..9 QSB QSB - hw? BK
>>
> ___
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>
>
> -
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1416 / Virus Database: 2109/4113 - Release Date: 12/30/11
> 

___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX antenna switch

[Eric Tichansky NO3M]

System similar to what you mentioned regarding the gain 
compensation/distribution, HPF/BPFs, RX overload, PTT, and 
additional signal path sources and output routing (incl. looping 
back): http://no3m.net/index.php?page=signal-processor

Has an on-board embedded MPU, but a header can be used w/ 
switches for manual control.

73/HNY - Eric NO3M

> If it were the 'ideal' thing, there'd be a box with a matrix of switches (A x 
> B), gain blocks that could be put in/out of the circuit, BPFs that could be 
> put in and out, 'muting' of any RX output that is connected to a transmitter 
> that is transmitting, RX overload protection, and some general purpose inputs 
> to select the 'configuration'. Probably a PIC to run it, with a nice GUI app 
> to configure it.  
>
>
> - Brian N9ADG
>

___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX antenna switch

[Joe Subich, W4TV]

Interlocked switches should not be necessary for receive applications.
If by interlocked you're looking for a way to deselect one antenna
when selecting the next, check K1TTT's web site.  Dave had a push
button controller that would release previously selected antennas
when making a new selection.  I haven't looked for it recently so you
may need to do some digging.

73,

... Joe, W4TV


On 12/30/2011 3:27 PM, Dave G4GED wrote:
> - Original Message -
> From: "Brian Moran"
> Here's one that works for TX&  Rx.
> http://www.qsl.net/k5lxp/projects/CoaxSwitch/CoaxSwitch.html With lockout,
> etc. A homebrew version of the '6 pack' kind of box from array solutions. I
> have the Array Solutions one, and it works great.
> - Brian N9ADG
> 
>
> Thanks Brian for the submission which I'm sure admirably suits selection of
> TX/RX  antennas perhaps for selection of different bands etc.
> If I've read it correctly, the antennas are selected by rotary switches.
> The primary need for selection of RX antennas on TopBand is to be able to
> switch from any one to any other instantly without the tedium and confusion
> of having to spin a rotary switch back and forth whilst trying to find best
> copy out of an extreemly weak signal down in the noise.
> A matrix of "quiet" interlocked push button switches would be ideal, which
> require just one push to instantly change from any one antenna to any other.
> Unfortunately, they're not easy to come by these days which is why I'm
> thinking of a relay based solution. There's undoubtably software solutions
> available to do this but I'm afraid that's out of my league, unless someone
> here can pull a design out ready made for DIY!
> Cheers Dave
>
> ___
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>
___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX antenna switch

[Dave G4GED]

- Original Message - 
From: "Brian Moran" 
Here's one that works for TX & Rx. 
http://www.qsl.net/k5lxp/projects/CoaxSwitch/CoaxSwitch.html With lockout, 
etc. A homebrew version of the '6 pack' kind of box from array solutions. I 
have the Array Solutions one, and it works great.
- Brian N9ADG


Thanks Brian for the submission which I'm sure admirably suits selection of 
TX/RX  antennas perhaps for selection of different bands etc.
If I've read it correctly, the antennas are selected by rotary switches.
The primary need for selection of RX antennas on TopBand is to be able to 
switch from any one to any other instantly without the tedium and confusion 
of having to spin a rotary switch back and forth whilst trying to find best 
copy out of an extreemly weak signal down in the noise.
A matrix of "quiet" interlocked push button switches would be ideal, which 
require just one push to instantly change from any one antenna to any other. 
Unfortunately, they're not easy to come by these days which is why I'm 
thinking of a relay based solution. There's undoubtably software solutions 
available to do this but I'm afraid that's out of my league, unless someone 
here can pull a design out ready made for DIY!
Cheers Dave

___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX antenna switch

[Brian Moran]

Here's one that works for TX & Rx. 
http://www.qsl.net/k5lxp/projects/CoaxSwitch/CoaxSwitch.html With lockout, etc. 
A homebrew version of the '6 pack' kind of box from array solutions. I have the 
Array Solutions one, and it works great.


I have built a small one for RX only that uses SMD relays, however it does NOT 
prevent the same antenna from used simultaneously. I wanted a small footprint, 
so used RJ45's to handle the switching signals to the switching boxes. It's 
great with a K3 to put different antennas in different ears with diversity 
mode, and makes it easier to pick out geographically distinct stations in the 
sound field. If you want the PCB layout, I can email it to you; the RX 
switchbox is in daily use.


If you're really going to build one of these, you should also see what VP6DI 
did (Eric Scace K3NA has an article you can google for) as far as equalizing 
signals when multiple radios listened to the same antenna, minimizing leakage 
of signals BACK INTO the antennas from a transmitting radio (it happens, even 
with the best of radios); he also went as far as breaking out 160m listening 
from 80m listening, and segregating 80m phone from 80m cw portions of the band.

If it were the 'ideal' thing, there'd be a box with a matrix of switches (A x 
B), gain blocks that could be put in/out of the circuit, BPFs that could be put 
in and out, 'muting' of any RX output that is connected to a transmitter that 
is transmitting, RX overload protection, and some general purpose inputs to 
select the 'configuration'. Probably a PIC to run it, with a nice GUI app to 
configure it.   


- Brian N9ADG






 From: Dave G4GED 
To: "Dave Anderson, K4SV" ; TopBand Reflector 
 
Sent: Friday, December 30, 2011 7:15 AM
Subject: Re: Topband: RX antenna switch
 
- Original Message - 
Got a note from Gary K9AY, he says no time to make the RAS8x2 switches, real
work is too busy. So I suspect until Gary can make more they are not
available.
Dave Anderson, K4SV
--

That's a pity, I was just about to order one!

I haven't a clue of the methods of interlock switching the RAS8x2 uses but
as it looks like we're going to have to make our own and my need to keep to
simple click-clunk technology. I believe that using relays with a spare 
contact in such a cicuit that disables any other relay once operated, would 
do the job?

Before I set about reinventing the wheel, does anyone have the knowledge or
a basic circuit diagram for this sort of relay interlocking please?
Tnx Dave

___
UR RST IS ... ... ..9 QSB QSB - hw? BK
___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX antenna switch

[K9AY]

Topbanders,

Re: the recent discussion of antenna switches and the AY Technologies 
RAS-8x2 -- yes, production has been suspended while I work on my "real job" 
which now involves starting a new company (www.rfti.com for those who might 
be interested).

I have only today started a conversation with a ham supplier who might 
continue the RAS-8x2 and perhaps other products I haven't made for a while. 
Even if that works out, there will be startup time -- hopefully, I can set 
aside time in February to work on a final batch of RAS units. No promises, 
but I'll try...

Final note -- I have been providing repair services for the AYL-4 K9AY Loop 
systems made prior to Array Solutions taking over its manufacture. I will do 
the same for RAS-8x2 units already in the field.

73 and Happy New Year to all!

Gary
K9AY

___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX antenna switch

[Bill Cromwell]

On Fri, 2011-12-30 at 15:15 +, Dave G4GED wrote:
> - Original Message - 
> Got a note from Gary K9AY, he says no time to make the RAS8x2 switches, real
> work is too busy. So I suspect until Gary can make more they are not
> available.
> Dave Anderson, K4SV
> --
> 
> That's a pity, I was just about to order one!
> 
> I haven't a clue of the methods of interlock switching the RAS8x2 uses but
> as it looks like we're going to have to make our own and my need to keep to
> simple click-clunk technology. I believe that using relays with a spare 
> contact in such a cicuit that disables any other relay once operated, would 
> do the job?
> 
> Before I set about reinventing the wheel, does anyone have the knowledge or
> a basic circuit diagram for this sort of relay interlocking please?
> Tnx Dave
> 
> ___
> UR RST IS ... ... ..9 QSB QSB - hw? BK

Please reply with directions to Dave's query on the list or.. include me
if the reply is off-list. I am facing some of the same issues. Maybe I
could sort it out for myself but why reinvent the wheel?

73,

Bill  KU8H

___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX antenna switch

[Dave G4GED]

- Original Message - 
Got a note from Gary K9AY, he says no time to make the RAS8x2 switches, real
work is too busy. So I suspect until Gary can make more they are not
available.
Dave Anderson, K4SV
--

That's a pity, I was just about to order one!

I haven't a clue of the methods of interlock switching the RAS8x2 uses but
as it looks like we're going to have to make our own and my need to keep to
simple click-clunk technology. I believe that using relays with a spare 
contact in such a cicuit that disables any other relay once operated, would 
do the job?

Before I set about reinventing the wheel, does anyone have the knowledge or
a basic circuit diagram for this sort of relay interlocking please?
Tnx Dave

___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX antenna switch

[Herb Schoenbohm]

The K9AY RAS 8x2 is very nicebut I wish it had an on screen GUI 
control.  There is an interesting multiple RX antenna switch marketed at 
4O3A.com that does allow for an on screen control and a multitude of RX 
antenna choices. This make it usable for remote operations which are 
growing in popularity for contests.


Herb Schoenbohm, KV4FZ




  Thorvaldur Stefansson wrote:
> The RAS 8x2 is the perfect solution.
>
> I have used mine for several years.  I have 8 Beverage antenna directions
> going to two receivers in my K3, any combination of single/combined
> Beverage + Diversity.
>
> Just a very happy user.
>
> http://www.aytechnologies.com/Products/RAS8x2data.htm
>
> 73 Thor, TF4M
>
>
___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX antenna switch

[Milt -- N5IA]

Here I use a basic 8 port antenna selector designed to my specifications by 
a ham friend of mine.  The circuit boards are professionally etched and are 
equipped with chassis mount "F" female connectors.  The single, 8 port 
boards can be daisy chained for 16, 24, etc. antennas selections.

At this QTH the Beverage antennas are remotely controlled via the Green 
Heron 2 GHz system at a distance of nearly 1/2 mile.

Currently the system is comprised of 19 separate antennas, each RF split 3 
ways, with each split antenna selection fed to one of three separate groups 
of three of the above described boards.

Results are at three operating positions each op has independent, totally 
separate control and visual readout of the direction and labeling of any of 
the 19 antennas.

The visual is provided by a programmable compass rose on the computer 
display screen.  Selection is by either clicking with the mouse which 
provides instant, opposite direction selection for an example, or via a USB 
rotary switch for normal step by step selection of the antennas.

I have no connection with Green Heron other than I am in love with the 
upgrade of control capability their system has provided for my remote 
Beverage farm.  It is so nice to have retired the old DTMF and basic CPU 
type controllers and control lines.

73, and good luck de Milt, N5IA


-Original Message- 
From: W0UCE
Sent: Wednesday, December 28, 2011 8:29 AM
To: topband@contesting.com
Subject: Topband: RX antenna switch

A new computer controlled RX or TX Antenna switch will be on the market in
about a month.  It will control up to 10 antennas or any other contact
closure selection device with the click of a mouse.  Users will be able to
assign GUI designators to each port.  Example for beverage selection the
user may want to designate:
NE, North East, EU, 45 or any other designator of choice...  I have a
prototype at my QTH and am doing field trial now.

Details will be announced on Top Band and other venues.

73,
Jack



___
UR RST IS ... ... ..9 QSB QSB - hw? BK


-
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.1901 / Virus Database: 2109/4707 - Release Date: 12/27/11 

___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX antenna switch

[Thorvaldur Stefansson]

The RAS 8x2 is the perfect solution.

I have used mine for several years.  I have 8 Beverage antenna directions
going to two receivers in my K3, any combination of single/combined
Beverage + Diversity.

Just a very happy user.

http://www.aytechnologies.com/Products/RAS8x2data.htm

73 Thor, TF4M

On 28 December 2011 14:35, Roger D Johnson  wrote:

> I'm sure that I'm like a lot of Top Banders in that I have a bunch of
> receiving antennas (5 at present) that I would like to switch to
> several different receiver type inputs. At present, I have a patch
> panel but am looking for something quicker and more convenient.
> It occurred to me that some sort of matrix switch would be ideal.
> A web search didn't turn up anything suitable. Any ideas out there?
>
> 73, Roger
>
> -- Remember the Liberty (AGTR-5)
> http://www.usslibertyveterans.org/
> http://www.gtr5.com/
> ___
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>
___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX antenna switch

[Joel Harrison]

Ditto what Frank said.

I have one and give it an 11 on a scale of 1 to 10.

ZN


On Wed, Dec 28, 2011 at 9:08 AM,  wrote:

> Roger,
>
> The K9AY Model RAS-8x2 Receive Antenna Switching System selects up to 8
> antennas to 2 receivers.  Each receiver can select one to eight antennas
> simultaneously.  I have three of these systems in my station and they work
> great!
>
> http://www.aytechnologies.com
>
> 73
> Frank
> W3LPL
>
>  Original message 
> >Date: Wed, 28 Dec 2011 09:35:04 -0500
> >From: Roger D Johnson 
> >Subject: Topband: RX antenna switch
> >To: topband@contesting.com
> >
> >I'm sure that I'm like a lot of Top Banders in that I have a bunch of
> >receiving antennas (5 at present) that I would like to switch to
> >several different receiver type inputs. At present, I have a patch
> >panel but am looking for something quicker and more convenient.
> >It occurred to me that some sort of matrix switch would be ideal.
> >A web search didn't turn up anything suitable. Any ideas out there?
> >
> >73, Roger
> >
> >-- Remember the Liberty (AGTR-5)
> >http://www.usslibertyveterans.org/
> >http://www.gtr5.com/
> >___
> >UR RST IS ... ... ..9 QSB QSB - hw? BK
> ___
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>



-- 
73 Joel W5ZN

www.w5zn.org
___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX antenna switch

[donovanf]

Roger,

The K9AY Model RAS-8x2 Receive Antenna Switching System selects up to 8 
antennas to 2 receivers.  Each receiver can select one to eight antennas 
simultaneously.  I have three of these systems in my station and they work 
great!

http://www.aytechnologies.com

73
Frank
W3LPL

 Original message 
>Date: Wed, 28 Dec 2011 09:35:04 -0500
>From: Roger D Johnson   
>Subject: Topband: RX antenna switch  
>To: topband@contesting.com
>
>I'm sure that I'm like a lot of Top Banders in that I have a bunch of
>receiving antennas (5 at present) that I would like to switch to
>several different receiver type inputs. At present, I have a patch
>panel but am looking for something quicker and more convenient.
>It occurred to me that some sort of matrix switch would be ideal.
>A web search didn't turn up anything suitable. Any ideas out there?
>
>73, Roger
>
>-- Remember the Liberty (AGTR-5)
>http://www.usslibertyveterans.org/
>http://www.gtr5.com/
>___
>UR RST IS ... ... ..9 QSB QSB - hw? BK
___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: Rx antenna suggestions

[n4is]

Hi Gary

>>I need to do something with my Rx antennae <<


First thing to do is detune or neutralize your TX antenna during RX, a
vacuum relay disconnecting the center of the coax maybe enough,. NX4D
figured out that it was not enough for his insulated tower, it was necessary
a second relay and a detuning wire coming from 18ft as W8JI suggest n his
site to detune a tower.

The TX antenna is resonant and it dominates any RX antenna reradiation
signal and noise. The iteration is severe and you see no improvement on
signal noise between the Inverted L and any RX antenna around.

Regards 
Jose Carlos
N4IS


___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX Antenna

[Gene Smar]

Jack:

 Before I had to remove them to make room for my tower in the backyard, 
I had three bi-directional EWE's and switching relays powered over the coax. 
They worked extremely well in separating sigs on Topband and even 80M.  I 
was amazed at how well they worked.

 If you decide to go with relays for switching, make sure you buy sealed 
units.  Mine were cheap ones from the Shack that worked the first year but 
corrosion set in and they were not that great the second year.  That's when 
I built my tower and had to remove them to make room.  However, they were 
very easy to install and get working.

73 de
Gene Smar Ad3F


- Original Message - 
From: "W0UCE" 
To: 
Sent: Monday, February 21, 2011 5:56 PM
Subject: Topband: RX Antenna


>I would appreciate hearing from folks using Pennants, Flags or EWEs for RX
> antennas on 160 and 80m with regard to your success with them and any
> recommendations you care to offer.  I have no room for beverages here but
> plenty of natural supports for simple wire RX antennas.
>
>
>
> Thanks,
>
> Jack W0UCE
>
> ___
> UR RST IS ... ... ..9 QSB QSB - hw? BK 

___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX Antenna

[DAVID CUTHBERT]

I'm right in the middle of the search for a receive antenna. I tried an
MFJ-1025 noise canceler and it works quite well to null out the one dominant
local noise source that comes on from time to time. But it does nothing for
the other noise sources. I then tried a short loaded dipole with a good 1:1
current balun to see if the noise was vertically polarized. No improvement.
I then (last week) built a 5 x 8 ft rotating terminated loop with a 9:1
balun. A Radio Shack rotator turns it. Not enough signal and so today I
ordered a DX Engineering preamp. So far I'm into this receive antenna
adventure to the tune of $800 and I'm determined to get something that does
the job.

   Dave WX7G
___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX Antenna

[Mike Fatchett W0MU]

You might look at the K9AY receiving loops from Array Solutions or the 4 
sq receive antennas from Dx Engineering.  I have used the DXE 4 sq rcv 
antennas and they work very well.

Mike W0MU

On 2/21/2011 3:56 PM, W0UCE wrote:
> I would appreciate hearing from folks using Pennants, Flags or EWEs for RX
> antennas on 160 and 80m with regard to your success with them and any
> recommendations you care to offer.  I have no room for beverages here but
> plenty of natural supports for simple wire RX antennas.
>
>
>
> Thanks,
>
> Jack W0UCE
>
> ___
> UR RST IS ... ... ..9 QSB QSB - hw? BK
___
UR RST IS ... ... ..9 QSB QSB - hw? BK

Re: Topband: RX Antenna

[Arthur Delibert]

I'm in the same situation:  A small suburban lot, with no room for a beverage, 
but some trees to support pennants, flags, etc.  At the moment, I'm using a 
pennant to separate Saudi Arabia on 1521 AM from WWKB in Buffalo on 1520.  No 
other antenna I've tried really comes close.  Noise in the house (which I can't 
entirely control) makes it impossible to use a small, amplified indoor loop 
antenna, although some MW DXers have used those successfully.
 
The pennant feeds a DX Engineering amp, followed by a line isolator to make 
sure the outer braid on the co-ax isn't part of the antenna.  I tried it 
without the line isolator, and I tried it with the DX Engineering amp in the 
house.  Either of those arrangements degraded performance.  The pennant is the 
"standard" dimensions described in the original articles.
 
This antenna often helps on higher frequencies as well, since there's a fair 
amount of noise in this area.
 
At a prior QTH, I tried the horizontal square described in QST for September 
1995 (Beezley, "A Receiving Antenna the Rejects Local Noise").  Results were 
great, but my current layout doesn't lend itself to that antenna, which needs 
four supports and should be perfectly horizontal.
 
--Art Delibert, KB3FJO
 
> From: w0...@nc.rr.com
> To: topband@contesting.com
> Date: Mon, 21 Feb 2011 17:56:26 -0500
> Subject: Topband: RX Antenna
> 
> I would appreciate hearing from folks using Pennants, Flags or EWEs for RX
> antennas on 160 and 80m with regard to your success with them and any
> recommendations you care to offer. I have no room for beverages here but
> plenty of natural supports for simple wire RX antennas. 
> 
> 
> 
> Thanks,
> 
> Jack W0UCE
> 
> ___
> UR RST IS ... ... ..9 QSB QSB - hw? BK
  
___
UR RST IS ... ... ..9 QSB QSB - hw? BK