Re: Topband: W0CM Coaxial Quarter Wave 160M RX Antenna

2016-09-22 Thread Mark K3MSB
Hi Bob

Thank you for your post.In addition to the link you provided, the only
other info I have for this antenna is from

http://lists.contesting.com/_topband/1996-10/msg00146.html

and

http://www.kcdxclub.com/LOW%20BAND%20RECEIVING%20ANTENNAS-1.pdf  (pages
21-22).

I've been in email contact with Mike AB0X and he has used the antenna in
the past with success, as has my friend Glenn K3SWZ.

I'm intrigued with this antenna as I can avoid my radial field with it.

73 Mark K3MSB

On Thu, Sep 22, 2016 at 7:42 PM, Bob K6UJ  wrote:

> Mark,
>
> I think you are talking about this RX antenna.   I would like to know
> more about it.
>
> http://lists.contesting.com/_topband/1996-10/msg00137.html
>
> Bob
> K6UJ
>
>
>
>
>
> On 9/21/16 6:01 PM, Mark K3MSB wrote:
>
>> Hello All --
>>
>> Do any of you have any experience with this antenna ?
>>
>> 73 Mark K3MSB
>> _
>> Topband Reflector Archives - http://www.contesting.com/_topband
>>
>>
> _
> Topband Reflector Archives - http://www.contesting.com/_topband
>
_
Topband Reflector Archives - http://www.contesting.com/_topband


Re: Topband: W0CM Coaxial Quarter Wave 160M RX Antenna

2016-09-22 Thread Bob K6UJ

Mark,

I think you are talking about this RX antenna.   I would like to know
more about it.

http://lists.contesting.com/_topband/1996-10/msg00137.html

Bob
K6UJ




On 9/21/16 6:01 PM, Mark K3MSB wrote:

Hello All --

Do any of you have any experience with this antenna ?

73 Mark K3MSB
_
Topband Reflector Archives - http://www.contesting.com/_topband



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


Re: Topband: RX / TX antenna switching

2016-09-22 Thread Herbert Schoenbohm
The RF Sense MFJ type of switch box are cheap but do have limitations.  
The DX-Engineering  RTR-1 is a bit more money but is considerably more 
user friendly with some added features like being able to check the RX 
antenna vs the TX antenna either with a momentary toggle switch or with 
the same switch in the up position which immediately reverts back to the 
TX antenna for RX.  I have two RTR-1's in the shack and they are well 
Engineered for the discerning low band DX-er with status lights and 
front panel control in a box in front of you. It also has the PTT safety 
lock out feature.




Herb Schoenbohm, KV4FZ


On 9/22/2016 4:33 PM, Charles Moizeau wrote:
Boxbe  This message is eligible for 
Automatic Cleanup! (w...@msn.com) Add cleanup rule 
 
| More info 
 





ea6vq...@dxmaps.com

Gabriel,

View two products from MFJ enterprises, MFJ-1707 and MFJ-1708.

73,

Charles, W2SH
***

From: Topband  on behalf of Gabriel - EA6VQ 

Sent: Thursday, September 22, 2016 1:27 PM
To: 'Topband'
Subject: Topband: RX / TX antenna switching

I will appreciate your advice in the best (but simple) way to switch between RX 
and TX antennas for a transceiver that does not have a separate RX antenna 
input.

The system should be able to switch from RX antenna to TX antenna when PTT is 
applied (and vice versa) but also allow to switch between the two antennas 
during reception in order to compare.

I have thought about using a coax relay as I do switch the VHF preamps, but I 
think it's switching will possibly too slow and some RF could flow to the RX 
antenna, causing damage.

Any ideas will be welcome!

73. Gabriel - EA6VQ



_
Topband Reflector Archives - http://www.contesting.com/_topband
Topband Archives - Contesting
www.contesting.com
Topband Mailing List Archives. Search String: [How to search] Display: ...

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


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


Re: Topband: 160 meter starter antennas

2016-09-22 Thread Wes Stewart
If people were working and logging V63KS, they weren't really copying him.  He's 
signing V633KS.  He came up out of the noise (and the noise from the east died 
with the rising sun) and I worked him about 15 minutes after SR in Tucson.  579 
on my starter antenna, inverted-vee, apex at 45 feet, ends about 6 feet:-)


N7WS

 On 9/22/2016 2:00 PM, Kenneth Grimm wrote:

160 is a great band.  My first contact was in Texas with 40 watts of AM on
a Viking Ranger in 1957 with a station in Kansas.  I thought that was great
DX.  Many years later, with over 200 countries worked, I am happy that I am
here on the East Coast in Virginia when the DX comes rolling in from Europe
and I am among the first to hear them.  But then, of course, I wished I
were back in Texas this morning when I couldn't even  hear a peep out of
V63KS and folks in the Lone Star State were bragging about how strong he
was.  Like I said 160 is a great band.  There's great DX on it for
everyone...if you dig deep enough into the noise...and hold your mouth just
right.

73,

Ken - K4XL


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


Topband: 160 meter starter antennas

2016-09-22 Thread K1FZ-Bruce


To: Aravind Balasubramanian 

Hello Aravind,
 
If phased on 160 the close spacing creates many problems for the phasing and 
very low impedances. 
 
Coax cables  need to be different length than 80 meter cables. 
 
Years ago I had phased on 80 meters, and switched  to to a non phased on 160. 
Used  the non fed tower as a tuned reflector against ground. 
Required a lot of  switching relays. 
 
It worked better than a single vertical, but not great. 
 
 Got some front to back that was useful on receive. 
 
It was a lot of years ago, unable to  remember all the details. 
 
73
 
Bruce-k1fz
 

On Fri, 23 Sep 2016 02:17:21 +0530, Aravind Balasubramanian  wrote:

  i just planted my first topband antenna. a homebrew extended length
butternut 2 v with homebrew tbr160 coil on a 30 feet pushup mast to help me
squeeze a slooping radial in my 40 feet x 45 feet tiny terrace. i was able
start my 160m dxcc ac with a ua4 on lotw. Want to add one more hf9v and
convert it into a 2 el phased array for 80m with a compromise spacing of 50
ft (max diagonal spacing available). rx is a challenge. max allowed power
of 400 w dc input to final in vu land is another challenge. i plan to build
a dual waller flag http://nx4d10.wixsite.com/waller-flag/page3 and place it
as far away from the diagonal line of the phased array as possible. what
kind if interaction/detuning/directivity hit should i expect. for 160m/cqww
cw contest weekends i can try installing the flag in my neighbours terrace
temporarily. 

assuming i add another tbr160 to the 2nd hf9v can i expect any directivty
gained by the 80m phasing on 160m. i will keep the linear happy by using a
tuner. has anyone modelled something similar?

any tips/suggestions welcome. 

73 de Aravind vu2abs

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

Re: Topband: 160 meter starter antennas

2016-09-22 Thread Kenneth Grimm
160 is a great band.  My first contact was in Texas with 40 watts of AM on
a Viking Ranger in 1957 with a station in Kansas.  I thought that was great
DX.  Many years later, with over 200 countries worked, I am happy that I am
here on the East Coast in Virginia when the DX comes rolling in from Europe
and I am among the first to hear them.  But then, of course, I wished I
were back in Texas this morning when I couldn't even  hear a peep out of
V63KS and folks in the Lone Star State were bragging about how strong he
was.  Like I said 160 is a great band.  There's great DX on it for
everyone...if you dig deep enough into the noise...and hold your mouth just
right.

73,

Ken - K4XL

On Thu, Sep 22, 2016 at 4:48 PM, Steve Jones  wrote:

> I wish I could hear that good in texas.
> Steve WS5W
>
> On Thu, Sep 22, 2016 at 3:35 PM, K1FZ-Bruce  wrote:
>
> >
> >
> > Good Info Dave, Thanks.
> >  In Maine, one contest Weekend, about year 1999-2000  worked 103
> > countries.  Lots of countries in Europe not that far away in the
> Northeast
> > direction. 73
> > Bruce-k1fz
> >
> >
> > On Thu, 22 Sep 2016 14:49:04 -0500, daraym...@iowatelecom.net wrote:
> >
> >   Success also depends a lot on your location. Working 119 DXCC from
> a
> > 70'
> > inv vee from NY is a whole lot easier than doing it, for instance, out
> here
> > in the Midwest (Iowa). YMMV. . .73. . .Dave, W0FLS
> >
> > -Original Message-
> > From: Joe K2UF
> > Sent: Thursday, September 22, 2016 11:45 AM
> > To: 'Topband'
> > Subject: Re: Topband: 160 meter starter antennas
> >
> > I Have an inv V hanging off of my 70 foot tower. Because I live on a
> > suburb lot the legs of the antenna are bent to fit the lot (really
> ugly). I
> > have worked DXCC (119) with that minimal antenna. It can be done but you
> > have to be patient.
> > 73 Joe K2UF
> >
> > _
> > Topband Reflector Archives - http://www.contesting.com/_topband
> >
> >
> > _
> > Topband Reflector Archives - http://www.contesting.com/_topband
> >
>
>
>
> --
> Steve Jones
> _
> Topband Reflector Archives - http://www.contesting.com/_topband
>



-- 
Ken - K4XL
BoatAnchor Manual Archive
BAMA - http://bama.edebris.com

"Show me a politician who is poor, and I'll show you a poor
politician." - Carlos
Hank González
"Our major obligation is not to mistake slogans for solutions." - Edward R.
Murrow
_
Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: RX / TX antenna switching

2016-09-22 Thread kolson
A second for the RTR-1. Well built and reliable.

73 Kevin K3OX

- Original Message -
From: Herbert Schoenbohm 
To: topband@contesting.com
Sent: Thu, 22 Sep 2016 13:35:12 -0400 (EDT)
Subject: Re: Topband: RX / TX antenna switching

I use the DX-Engineering RTR-1 which is the easiest and best solution 
IHMO.  It even provides protection by locking the RX portion out on 
Transmit by loop the PTT amp cable.  I have two of these units now and 
use them on all the Icom radios. They even have a special momentary 
toggle for check the TX antenna for A/B RX tests.  Must have been 
designed by a thoughtful amateur.



Herb Schoenbohm, KV4FZ


On 9/22/2016 1:27 PM, Gabriel - EA6VQ wrote:
> Boxbe ; This message is eligible for 
> Automatic Cleanup! (ea6vq...@dxmaps.com) Add cleanup rule 
> 
;
 
> | More info 
> 
;
 
>
>
>
> I will appreciate your advice in the best (but simple) way to switch 
between RX and TX antennas for a transceiver that does not have a separate RX 
antenna input.
>
> The system should be able to switch from RX antenna to TX antenna when PTT 
is applied (and vice versa) but also allow to switch between the two antennas 
during reception in order to compare.
>
> I have thought about using a coax relay as I do switch the VHF preamps, 
but I think it's switching will possibly too slow and some RF could flow to the 
RX antenna, causing damage.
>
> Any ideas will be welcome!
>
> 73. Gabriel – EA6VQ
>
>
>
> _
> Topband Reflector Archives - http://www.contesting.com/_topband

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

Re: Topband: 160 meter starter antennas

2016-09-22 Thread Steve Jones
I wish I could hear that good in texas.
Steve WS5W

On Thu, Sep 22, 2016 at 3:35 PM, K1FZ-Bruce  wrote:

>
>
> Good Info Dave, Thanks.
>  In Maine, one contest Weekend, about year 1999-2000  worked 103
> countries.  Lots of countries in Europe not that far away in the Northeast
> direction. 73
> Bruce-k1fz
>
>
> On Thu, 22 Sep 2016 14:49:04 -0500, daraym...@iowatelecom.net wrote:
>
>   Success also depends a lot on your location. Working 119 DXCC from a
> 70'
> inv vee from NY is a whole lot easier than doing it, for instance, out here
> in the Midwest (Iowa). YMMV. . .73. . .Dave, W0FLS
>
> -Original Message-
> From: Joe K2UF
> Sent: Thursday, September 22, 2016 11:45 AM
> To: 'Topband'
> Subject: Re: Topband: 160 meter starter antennas
>
> I Have an inv V hanging off of my 70 foot tower. Because I live on a
> suburb lot the legs of the antenna are bent to fit the lot (really ugly). I
> have worked DXCC (119) with that minimal antenna. It can be done but you
> have to be patient.
> 73 Joe K2UF
>
> _
> Topband Reflector Archives - http://www.contesting.com/_topband
>
>
> _
> Topband Reflector Archives - http://www.contesting.com/_topband
>



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


Re: Topband: 160 meter starter antennas

2016-09-22 Thread Aravind Balasubramanian
i just planted my first topband antenna. a homebrew extended length
butternut 2 v with homebrew tbr160 coil on a 30 feet pushup mast to help me
squeeze a slooping radial in my 40 feet x 45 feet tiny terrace. i was able
start my 160m dxcc ac with a ua4 on lotw.  Want to add one more hf9v and
convert it into a 2 el phased array for 80m with a compromise spacing of 50
ft (max diagonal spacing available). rx is a challenge. max allowed power
of 400 w dc input to final in vu land is another challenge. i plan to build
a dual waller flag http://nx4d10.wixsite.com/waller-flag/page3 and place it
as far away from the diagonal line of the phased array as possible. what
kind if interaction/detuning/directivity hit should i expect. for 160m/cqww
cw contest weekends i can try installing the flag in my neighbours terrace
temporarily.

assuming i add another tbr160 to the 2nd hf9v can i expect any directivty
gained by the 80m phasing on 160m. i will keep the linear happy by using a
tuner. has anyone modelled something similar?

any tips/suggestions welcome.

73 de Aravind vu2abs

On 23 Sep 2016 01:19,  wrote:

> Success also depends a lot on your location.  Working 119 DXCC from a 70'
> inv vee from NY is a whole lot easier than doing it, for instance, out here
> in the Midwest (Iowa).YMMV. . .73. . .Dave, W0FLS
>
> -Original Message- From: Joe K2UF
> Sent: Thursday, September 22, 2016 11:45 AM
> To: 'Topband'
> Subject: Re: Topband: 160 meter starter antennas
>
> I Have an inv V hanging off of my 70 foot tower.  Because I live on a
> suburb lot the legs of the antenna are bent to fit the lot (really ugly).
> I
> have worked DXCC (119) with that minimal antenna.  It can be done but you
> have to be patient.
>
> 73  Joe K2UF
> _
> Topband Reflector Archives - http://www.contesting.com/_topband
>
_
Topband Reflector Archives - http://www.contesting.com/_topband


Re: Topband: 160 meter starter antennas

2016-09-22 Thread K1FZ-Bruce

 
 
Good Info Dave, Thanks. 
 In Maine, one contest Weekend, about year 1999-2000  worked 103 countries. 
 Lots of countries in Europe not that far away in the Northeast direction. 
73

Bruce-k1fz

On Thu, 22 Sep 2016 14:49:04 -0500, daraym...@iowatelecom.net wrote:

  Success also depends a lot on your location. Working 119 DXCC from a 70'
inv vee from NY is a whole lot easier than doing it, for instance, out here
in the Midwest (Iowa). YMMV. . .73. . .Dave, W0FLS

-Original Message-
From: Joe K2UF
Sent: Thursday, September 22, 2016 11:45 AM
To: 'Topband'
Subject: Re: Topband: 160 meter starter antennas

I Have an inv V hanging off of my 70 foot tower. Because I live on a
suburb lot the legs of the antenna are bent to fit the lot (really ugly). I
have worked DXCC (119) with that minimal antenna. It can be done but you
have to be patient. 


73 Joe K2UF

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


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

Re: Topband: RX / TX antenna switching

2016-09-22 Thread Charles Moizeau


ea6vq...@dxmaps.com

Gabriel,

View two products from MFJ enterprises, MFJ-1707 and MFJ-1708.

73,

Charles, W2SH
***

From: Topband  on behalf of Gabriel - EA6VQ 

Sent: Thursday, September 22, 2016 1:27 PM
To: 'Topband'
Subject: Topband: RX / TX antenna switching

I will appreciate your advice in the best (but simple) way to switch between RX 
and TX antennas for a transceiver that does not have a separate RX antenna 
input.

The system should be able to switch from RX antenna to TX antenna when PTT is 
applied (and vice versa) but also allow to switch between the two antennas 
during reception in order to compare.

I have thought about using a coax relay as I do switch the VHF preamps, but I 
think it's switching will possibly too slow and some RF could flow to the RX 
antenna, causing damage.

Any ideas will be welcome!

73. Gabriel - EA6VQ



_
Topband Reflector Archives - http://www.contesting.com/_topband
Topband Archives - Contesting
www.contesting.com
Topband Mailing List Archives. Search String: [How to search] Display: ...

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


Re: Topband: 160 meter starter antennas

2016-09-22 Thread daraymond
Success also depends a lot on your location.  Working 119 DXCC from a 70' 
inv vee from NY is a whole lot easier than doing it, for instance, out here 
in the Midwest (Iowa).YMMV. . .73. . .Dave, W0FLS


-Original Message- 
From: Joe K2UF

Sent: Thursday, September 22, 2016 11:45 AM
To: 'Topband'
Subject: Re: Topband: 160 meter starter antennas

I Have an inv V hanging off of my 70 foot tower.  Because I live on a
suburb lot the legs of the antenna are bent to fit the lot (really ugly).  I
have worked DXCC (119) with that minimal antenna.  It can be done but you
have to be patient.

73  Joe K2UF 


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


Re: Topband: RX / TX antenna switching

2016-09-22 Thread Jorge Diez - CX6VM
Hola Gabriel

great product and great support from DXE or KD9SV

https://www.dxengineering.com/search/product-line/kd9sv-products-sv-dxiiss-dxpedition-ii-receive-antenna-switches

73,
Jorge
CX6VM/CW5W

2016-09-22 14:27 GMT-03:00 Gabriel - EA6VQ :

> I will appreciate your advice in the best (but simple) way to switch
> between RX and TX antennas for a transceiver that does not have a separate
> RX antenna input.
>
> The system should be able to switch from RX antenna to TX antenna when PTT
> is applied (and vice versa) but also allow to switch between the two
> antennas during reception in order to compare.
>
> I have thought about using a coax relay as I do switch the VHF preamps,
> but I think it's switching will possibly too slow and some RF could flow to
> the RX antenna, causing damage.
>
> Any ideas will be welcome!
>
> 73. Gabriel – EA6VQ
>
>
>
> _
> Topband Reflector Archives - http://www.contesting.com/_topband




-- 
73,
Jorge
CX6VM/CW5W
_
Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: Flag close to tower?

2016-09-22 Thread K1FZ-Bruce

 
 
WB6RSE has done exceedingly well with his Roof Mounted  rotatable Flag 
antenna that is very close to his transmit vertical. 
 
See March 2011 QST magazine. 
 

73
Bruce-k1fz

On Thu, 22 Sep 2016 10:52:25 -0700, Bob K6UJ  wrote:

  I am thinking of trying a rotatable flag for 160. 
I have a small lot and the farthest distance I can install the flag from

my tower is 35 feet. Since it will be rotatable I assume I can aim the
null
at the tower to minimize any intereaction. Is it worth trying or not ?
I read somewhere that the K9AY loop antenna can perform fairly close to
a tower, but how about a flag ?

Bob
K6UJ

 Bruce-k1fz
  http://www.qsl.net/k1fz/flag_antennas.html
  _


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

Re: Topband: 160 meter starter antennas

2016-09-22 Thread K1FZ-Bruce

 
 
The rorary Flag antenna by WB6RSE was in March 2011, QST magazine. He 
has done exceeding well receiving with his Flag antenna on 160 meters.. 


 
73
Bruce-k1fz
 
 

On Thu, 22 Sep 2016 17:07:31 +, Arthur Delibert  wrote:

  I have good luck with a pennant antenna, using a DX Engineering 
pre-amp at the antenna.  I live in a densely populated suburb, where 
it seems like every neighbor has every RF noise-maker ever invented, 
and the antenna does a pretty good job except for neighbors that are 
right off the front end of the antenna.  The down-side is that it's 
fixed direction; but I have seen info about someone who built one on a 
rotating platform.  There's a ton of information about how to 
make them at  http://www.angelfire.com/md/k3ky/page37.html

 
Art Delibert, KB3FJO
North Bethesda, MD

-
From: Topband  on behalf of K1FZ-Bruce
Sent: Thursday, September 22, 2016 11:47 AM
To: Topband
Subject: Topband: 160 meter starter antennas 

This is the time of year that many of us in the Northern Hemisphere 
have been waiting for. 

 
 DX is coming up, long and stronger. Many 'old timers'  have their 
antennas  "ready to roll". 
 
New comers to the band may want an inexpensive starter receive antenna, 
If there is space
a beverage is a good forgiving antenna. 
 

 
For limited space:
Despite some criticizing,  a loop antenna can result in many DX 
contacts. Even SWL's in the AM radio  BCB like them. 
 
Yes there are always better antennas, but many of us started with 
in-expensive wire types. 
 

73
Bruce-k1fz
http://www.qsl.net/k1fz/flag_antennas.html

 
flag_loop_antennas - QSL.net
www.qsl.net
Recommend a 900 ohm low capacitance primary antenna connection. 
Isolation: Less than 6pf (3-4pf typical) inter-winding capacitance for 
minimum common mode transfer ... 


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


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

Topband: Flag close to tower?

2016-09-22 Thread Bob K6UJ

I am thinking of trying a rotatable flag for 160.
I have a small lot and the farthest distance I can install the flag from
my tower is 35 feet.  Since it will be rotatable I assume I can aim the 
null

at the tower to minimize any intereaction.  Is it worth trying or not ?
I read somewhere that the K9AY loop antenna can perform fairly close to
a tower, but how about a flag ?

Bob
K6UJ

On 9/22/16 10:11 AM, Paul Mclaren wrote:

Bruce,

Yes, yes and yes. 9:1 transformers, beverage friendly resistors (cant
remember the exact spec) with about 1" connection to the ground rods.
Ground rods not that long but shallow clay bed here anyway and a mossy lawn
due to the lack of drainage so fair conductivity. Coax is just pushed about
1" into a slit in the lawn so not ideal and needs a more permanent
solution. To be honest it was a quick and dirty experiment so will get
improved when I do some landscaping the xyl has requested which naturally
will include new buried coax conduits and more radials.

Regards

Paul MM0ZBH





On Thu, 22 Sep 2016 at 17:57, K1FZ-Bruce  wrote:


Hi Paul,



Glad you are ready to work DX



Are the Beverage antenna transformer and termination resistor  close to
the ground rods, with short interconnect wires.?



Are your coax cables buried to help with noise pick up.?



Some of the small metal loops are not as good as the larger wire home
built ones.

DX is getting much better  most notice-able at sunrise & sunset.



73

Bruce



On Thu, 22 Sep 2016 17:25:25 +0100, Paul Mclaren 
wrote:

I am in that category only having put up inverted L for 160m as an
extension on my 40m quarterwave vertical recently.   Receive antennas are
Wellbrook loop and a couple of 40m beverages point NE/SW on top of a 7 foot
high boundary wall.  This was only put in place in the summer so yet to try
my first winter and can't really believe I will hear anything Stateside or
beyond - my best DX so far with limited effort is A65.   The beverages are
not very directional on 160m but hear into the local suburban noise better
than the loop plus they work well on 80m and 40m RX as a bonus.

I'll take any criticism going but for a normal UK house my garden is
pretty average so I have to make do.

Regards

Paul MM0ZBH

Bruce-k1fz

http://www.qsl.net/k1fz/flag_antennas.html
_
Topband Reflector Archives - http://www.contesting.com/_topband



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



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


Re: Topband: RX / TX antenna switching

2016-09-22 Thread Herbert Schoenbohm
I use the DX-Engineering RTR-1 which is the easiest and best solution 
IHMO.  It even provides protection by locking the RX portion out on 
Transmit by loop the PTT amp cable.  I have two of these units now and 
use them on all the Icom radios. They even have a special momentary 
toggle for check the TX antenna for A/B RX tests.  Must have been 
designed by a thoughtful amateur.




Herb Schoenbohm, KV4FZ


On 9/22/2016 1:27 PM, Gabriel - EA6VQ wrote:
Boxbe  This message is eligible for 
Automatic Cleanup! (ea6vq...@dxmaps.com) Add cleanup rule 
 
| More info 
 




I will appreciate your advice in the best (but simple) way to switch between RX 
and TX antennas for a transceiver that does not have a separate RX antenna 
input.

The system should be able to switch from RX antenna to TX antenna when PTT is 
applied (and vice versa) but also allow to switch between the two antennas 
during reception in order to compare.

I have thought about using a coax relay as I do switch the VHF preamps, but I 
think it's switching will possibly too slow and some RF could flow to the RX 
antenna, causing damage.

Any ideas will be welcome!

73. Gabriel – EA6VQ



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


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

Topband: RX / TX antenna switching

2016-09-22 Thread Gabriel - EA6VQ
I will appreciate your advice in the best (but simple) way to switch between RX 
and TX antennas for a transceiver that does not have a separate RX antenna 
input.

The system should be able to switch from RX antenna to TX antenna when PTT is 
applied (and vice versa) but also allow to switch between the two antennas 
during reception in order to compare.

I have thought about using a coax relay as I do switch the VHF preamps, but I 
think it's switching will possibly too slow and some RF could flow to the RX 
antenna, causing damage. 

Any ideas will be welcome!

73. Gabriel – EA6VQ



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

Re: Topband: 160 meter starter antennas

2016-09-22 Thread Paul Mclaren
Bruce,

Yes, yes and yes. 9:1 transformers, beverage friendly resistors (cant
remember the exact spec) with about 1" connection to the ground rods.
Ground rods not that long but shallow clay bed here anyway and a mossy lawn
due to the lack of drainage so fair conductivity. Coax is just pushed about
1" into a slit in the lawn so not ideal and needs a more permanent
solution. To be honest it was a quick and dirty experiment so will get
improved when I do some landscaping the xyl has requested which naturally
will include new buried coax conduits and more radials.

Regards

Paul MM0ZBH





On Thu, 22 Sep 2016 at 17:57, K1FZ-Bruce  wrote:

> Hi Paul,
>
>
>
> Glad you are ready to work DX
>
>
>
> Are the Beverage antenna transformer and termination resistor  close to
> the ground rods, with short interconnect wires.?
>
>
>
> Are your coax cables buried to help with noise pick up.?
>
>
>
> Some of the small metal loops are not as good as the larger wire home
> built ones.
>
> DX is getting much better  most notice-able at sunrise & sunset.
>
>
>
> 73
>
> Bruce
>
>
>
> On Thu, 22 Sep 2016 17:25:25 +0100, Paul Mclaren 
> wrote:
>
> I am in that category only having put up inverted L for 160m as an
> extension on my 40m quarterwave vertical recently.   Receive antennas are
> Wellbrook loop and a couple of 40m beverages point NE/SW on top of a 7 foot
> high boundary wall.  This was only put in place in the summer so yet to try
> my first winter and can't really believe I will hear anything Stateside or
> beyond - my best DX so far with limited effort is A65.   The beverages are
> not very directional on 160m but hear into the local suburban noise better
> than the loop plus they work well on 80m and 40m RX as a bonus.
>
> I'll take any criticism going but for a normal UK house my garden is
> pretty average so I have to make do.
>
> Regards
>
> Paul MM0ZBH
>
> Bruce-k1fz
>> http://www.qsl.net/k1fz/flag_antennas.html
>> _
>> Topband Reflector Archives - http://www.contesting.com/_topband
>
>
_
Topband Reflector Archives - http://www.contesting.com/_topband


Re: Topband: 160 meter starter antennas

2016-09-22 Thread Arthur Delibert
I have good luck with a pennant antenna, using a DX Engineering pre-amp at the 
antenna.  I live in a densely populated suburb, where it seems like every 
neighbor has every RF noise-maker ever invented, and the antenna does a pretty 
good job except for neighbors that are right off the front end of the antenna.  
The down-side is that it's fixed direction; but I have seen info about someone 
who built one on a rotating platform.  There's a ton of information about how 
to make them at http://www.angelfire.com/md/k3ky/page37.html




Art Delibert, KB3FJO

North Bethesda, MD


From: Topband  on behalf of K1FZ-Bruce 

Sent: Thursday, September 22, 2016 11:47 AM
To: Topband
Subject: Topband: 160 meter starter antennas


This is the time of year that many of us in the Northern Hemisphere have been 
waiting for.

 DX is coming up, long and stronger. Many 'old timers'  have their antennas  
"ready to roll".

New comers to the band may want an inexpensive starter receive antenna, If 
there is space
a beverage is a good forgiving antenna.


For limited space:
Despite some criticizing,  a loop antenna can result in many DX contacts. Even 
SWL's in the AM radio  BCB like them.

Yes there are always better antennas, but many of us started with in-expensive 
wire types.

73
Bruce-k1fz
http://www.qsl.net/k1fz/flag_antennas.html
flag_loop_antennas - QSL.net
www.qsl.net
Recommend a 900 ohm low capacitance primary antenna connection. Isolation: Less 
than 6pf (3-4pf typical) inter-winding capacitance for minimum common mode 
transfer ...


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


Topband: 160 meter starter antennas

2016-09-22 Thread K1FZ-Bruce

Hi Paul,

 
Glad you are ready to work DX
 
Are the Beverage antenna transformer and termination resistor  close 
to the ground rods, with short interconnect wires.?

 
Are your coax cables buried to help with noise pick up.?
 
Some of the small metal loops are not as good as the larger wire home 
built ones. 
DX is getting much better  most notice-able at sunrise & sunset. 
 

73
Bruce

On Thu, 22 Sep 2016 17:25:25 +0100, Paul Mclaren
 wrote:

  I am in that category only having put up inverted L for 160m as 
an extension on my 40m quarterwave vertical recently.   Receive 
antennas are Wellbrook loop and a couple of 40m beverages point 
NE/SW on top of a 7 foot high boundary wall.  This was only put in 
place in the summer so yet to try my first winter and can't really 
believe I will hear anything Stateside or beyond - my best DX so far 
with limited effort is A65.   The beverages are not very directional 
on 160m but hear into the local suburban noise better than the loop 
plus they work well on 80m and 40m RX as a bonus. 
 
I'll take any criticism going but for a normal UK house my garden is 
pretty average so I have to make do. 
 

Regards

Paul MM0ZBH

   
 

Bruce-k1fz
http://www.qsl.net/k1fz/flag_antennas.html
_
Topband Reflector Archives - http://www.contesting.com/_topband


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

Re: Topband: 160 meter starter antennas

2016-09-22 Thread Dick via Topband
My starter antenna for topband is still the only transmit antenna I have  
for 160. About 100' sloper off the top of a 40' tower with the distant end 
about  8' off the ground supported from a tree.
 
Of course a tuner is used and don't know what the effective radiaited power 
 is, but I have managed to work 185 so far on 160. The listening side was  
enhanced several years ago with a K9AY loop which doesn't take too much room 
and  brings the weak signals out of the noise better than the sloper most 
of the  time.
 
Good luck in the pileups as the new season is opening
 
Dick K9RT
 
 
In a message dated 9/22/2016 11:48:13 A.M. Eastern Daylight Time,  
k...@myfairpoint.net writes:


This  is the time of year that many of us in the Northern Hemisphere have 
been  waiting for. 

DX is coming up, long and stronger. Many  'old timers'  have their antennas 
 "ready to roll".  

New comers to the band may want an inexpensive starter receive  antenna, If 
there is space
a beverage is a good forgiving antenna.  


For limited space:
Despite  some criticizing,  a loop antenna can result in many DX contacts.  
Even SWL's in the AM radio  BCB like them. 

Yes there are  always better antennas, but many of us started with 
in-expensive wire types.  

73
Bruce-k1fz
http://www.qsl.net/k1fz/flag_antennas.html
_
Topband  Reflector Archives -  http://www.contesting.com/_topband
_
Topband Reflector Archives - http://www.contesting.com/_topband


Re: Topband: 160 meter starter antennas

2016-09-22 Thread Joe K2UF
 I Have an inv V hanging off of my 70 foot tower.  Because I live on a
suburb lot the legs of the antenna are bent to fit the lot (really ugly).  I
have worked DXCC (119) with that minimal antenna.  It can be done but you
have to be patient.

73  Joe K2UF 

-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of
K1FZ-Bruce
Sent: Thursday, September 22, 2016 11:47 AM
To: Topband
Subject: Topband: 160 meter starter antennas


This is the time of year that many of us in the Northern Hemisphere have
been waiting for. 
 
 DX is coming up, long and stronger. Many 'old timers'  have their antennas 
"ready to roll". 
 
New comers to the band may want an inexpensive starter receive antenna, If
there is space a beverage is a good forgiving antenna. 
 
 
For limited space:
Despite some criticizing,  a loop antenna can result in many DX contacts.
Even SWL's in the AM radio  BCB like them. 
 
Yes there are always better antennas, but many of us started with
in-expensive wire types. 
 
73
Bruce-k1fz
http://www.qsl.net/k1fz/flag_antennas.html
_
Topband Reflector Archives - http://www.contesting.com/_topband

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


Re: Topband: 160 meter starter antennas

2016-09-22 Thread Paul Mclaren
I am in that category only having put up inverted L for 160m as an
extension on my 40m quarterwave vertical recently.   Receive antennas are
Wellbrook loop and a couple of 40m beverages point NE/SW on top of a 7 foot
high boundary wall.  This was only put in place in the summer so yet to try
my first winter and can't really believe I will hear anything Stateside or
beyond - my best DX so far with limited effort is A65.   The beverages are
not very directional on 160m but hear into the local suburban noise better
than the loop plus they work well on 80m and 40m RX as a bonus.

I'll take any criticism going but for a normal UK house my garden is pretty
average so I have to make do.

Regards

Paul MM0ZBH

On 22 September 2016 at 16:47, K1FZ-Bruce  wrote:

>
> This is the time of year that many of us in the Northern Hemisphere have
> been waiting for.
>
>  DX is coming up, long and stronger. Many 'old timers'  have their
> antennas  "ready to roll".
>
> New comers to the band may want an inexpensive starter receive antenna, If
> there is space
> a beverage is a good forgiving antenna.
>
>
> For limited space:
> Despite some criticizing,  a loop antenna can result in many DX contacts.
> Even SWL's in the AM radio  BCB like them.
>
> Yes there are always better antennas, but many of us started with
> in-expensive wire types.
>
> 73
> Bruce-k1fz
> http://www.qsl.net/k1fz/flag_antennas.html
> _
> Topband Reflector Archives - http://www.contesting.com/_topband
_
Topband Reflector Archives - http://www.contesting.com/_topband


Topband: 160 meter starter antennas

2016-09-22 Thread K1FZ-Bruce

This is the time of year that many of us in the Northern Hemisphere have been 
waiting for. 
 
 DX is coming up, long and stronger. Many 'old timers'  have their antennas  
"ready to roll". 
 
New comers to the band may want an inexpensive starter receive antenna, If 
there is space
a beverage is a good forgiving antenna. 
 
 
For limited space:
Despite some criticizing,  a loop antenna can result in many DX contacts. Even 
SWL's in the AM radio  BCB like them. 
 
Yes there are always better antennas, but many of us started with in-expensive 
wire types. 
 
73
Bruce-k1fz
http://www.qsl.net/k1fz/flag_antennas.html
_
Topband Reflector Archives - http://www.contesting.com/_topband

Topband: 2W ceramic 470 ohm Resistors

2016-09-22 Thread Jay Terleski
Mouser   10 pack for $16.20

http://www.mouser.com/ProductDetail/Ohmite/OY471KE/?qs=sGAEpiMZZMvmQ%252bOLa8n%2fM0AL619UxluYs%252bchll6qvbU%3d

Put a 75V 10 kA GDT in parrallel with it.  10 pak at $1.41 and it will last
a long long time.


http://www.mouser.com/ProductDetail/EPCOS-TDK/EC75X/?qs=sGAEpiMZZMsdWQmBKEIh8ovqZm0VvzvZWNULxtUqFew%3d


Jay, WX0B

Jay Terleski
Array Solutions
214 954 7140
_
Topband Reflector Archives - http://www.contesting.com/_topband