Re: Long wire to SO-239 50 ohm?
bpnjensen
> Anything special needed to make this thing besides the wire and SO-239?
>
> I might want to transmit through this some day using a random wire tuner
> but for now it will be used for SWL.
> --
> Pierre Salinger Memorial Hook, Line & Sinker, June 2004
>
> COOSN-266-06-25794
If you want it to work at its best, you'll get/make a matching
transformer, 10:1 ratio, and insert it between them, and most of the
time providing a good ground to the appropriate lug of the transformer.
Run an appropriate length of coax cable between the transformer and
your radio. A Google search will bring up about a million posts on
this topic, and several websites that show you how. They are sold on
EBay and elsewhere. Don't fear - it is quite simple and quite
inexpensive.
For transmit, you may want to use low power - I would not run 1,000
watts through this set up.
Bruce Jensen
Bob Miller
wrote:
>
>Anything special needed to make this thing besides the wire and SO-239?
>
>I might want to transmit through this some day using a random wire tuner
>but for now it will be used for SWL.
Go ahead and hook it directly to a random wire tuner, and simply tune
for maximum loudness on a given frequency. MFJ makes an inexpensive
tuner for random wires.
bob
k5qwg
David
wrote:
>On Wed, 24 Jan 2007 12:32:51 -0600, Bob Miller Has Frothed:
>Thanks, would rather get a 10:1 balun for now. Haven't had the time to
>google it but there should be some instructions on how to make one myself.
If you use a cable TV Balun you'll get a quick and dirty 4:1
transformer and a marked improvement.
Telamon
David <ric...@knac.com> wrote:
Those don't work well below 10 MHz. 15 MHz and higher they are OK.
--
Telamon
Ventura, California
David
<telamon_s...@pacbell.net.is.invalid> wrote:
>
>> If you use a cable TV Balun you'll get a quick and dirty 4:1
>> transformer and a marked improvement.
>>
>> <http://www.radioshack.com/product/index.jsp?productId=2103912&cp=&sr=1&origkw=matching+transformer&kw=matching+transformer&parentPage=search>
>
>Those don't work well below 10 MHz. 15 MHz and higher they are OK.
How do you know?
What is the low frequency limiting component?
The Late Arky Bob
> Anything special needed to make this thing besides the wire and SO-239?
>
Engineers) and RF Systems (sold by Univeral Radio) are very good ones.
There are less expensive ones, too, but after a point, you get what you
pay for. Or you can roll your own if you feel so inclined. Plans for
them are not hard to find.
Depending on the length / height of the wire and the front end
characteristics of the radio, a passive preselector might be a good
accessory, also.
Telamon
David <ric...@knac.com> wrote:
I tested them.
> What is the low frequency limiting component?
I didn't go as far as that. This unit is made of a ferrite core and a
couple of very small value capacitors. I would guess the core was the
problem.
--
Telamon
Ventura, California
RHF
.
.
. .
On Jan 24, 6:37 pm, David <rick...@knac.com> wrote:
> On Wed, 24 Jan 2007 14:52:51 -0500, Meat Plow <m...@meatplow.local>
> wrote:
>
>
>
>
>
> >On Wed, 24 Jan 2007 12:32:51 -0600, Bob Miller Has Frothed:
>
> >> On Wed, 24 Jan 2007 09:12:43 -0500, Meat Plow <m...@meatplow.local>
> >> wrote:
>
> >>>Anything special needed to make this thing besides the wire and SO-239?
>
> >>>I might want to transmit through this some day using a random wire tuner
> >>>but for now it will be used for SWL.
>
> >> Go ahead and hook it directly to a random wire tuner, and simply tune
> >> for maximum loudness on a given frequency. MFJ makes an inexpensive
> >> tuner for random wires.
>
> >> bob
> >> k5qwg
>
> >Thanks, would rather get a 10:1 balun for now. Haven't had the time to
> >google it but there should be some instructions on how to make one myself.
-
- If you use a cable TV Balun you'll get a quick and
- dirty 4:1 transformer and a marked improvement.
-
- http://www.radioshack.com/product/index.jsp?productId=2103912
-
RHF
On Jan 25, 6:03 pm, Telamon
<telamon_spamshi...@pacbell.net.is.invalid> wrote:
> In article <kd93u21bdu57opb3t8j4vs8s9jnarr2...@4ax.com>,
>
> David <rick...@knac.com> wrote:
> > On Thu, 25 Jan 2007 03:06:28 GMT, Telamon
> > <telamon_spamshi...@pacbell.net.is.invalid> wrote:
>
> > >> If you use a cable TV Balun you'll get a quick and dirty 4:1
> > >> transformer and a marked improvement.
>
> > >> <http://www.radioshack.com/product/index.jsp?productId=2103912&cp=&sr=...
> > >> gkw=matching+transformer&kw=matching+transformer&parentPage=search>
>
> > >Those don't work well below 10 MHz. 15 MHz and higher they are OK.
>
> > How do you know?I tested them.
>
> > What is the low frequency limiting component?I didn't go as far as that. This unit is made of a ferrite core and a
> couple of very small value capacitors. I would guess the core was the
> problem.
>
> --
> Telamon
> Ventura, California
David and Telamon,
Some of the better 300 Ohm to 75 Ohm TV type Matching
Transformers are labeled as being good down to 5 MHz.
Usually these are the {Gold Plated} ones designed for
Cable and Satellite TV used.
? Honestly ? What good does the Gold Plating do on the
"F" Connector and the Spade Connectors : When it is the
internal components that will determine the real quality of
the signal entering one end and exiting the other.
They work 'ok' for a basic Shortwave Listener (SWL)
Random Wire Antenna "Matcher" with moderate size
{Lenght} Antennas in the range of 20-60 Feet.
Plus they have the extra advantage of attenuating those
High Power AM/MW Radio Stations below 1.8 MHz.
at least this has been my experience - speaking
of "quick and dirty" - hey that's me - iane ~ RHF
.
.
. .
RHF
Making The Simple Single Wire Antenna Element To Radio Connection
- - - That Was Easy !
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/12075
With a simple single Wire Antenna Element
Why use a PL-259 Plug to SO-239 Jack ?
You can simply use a Banana Plug 'plugged' into the
Center Connector of the SO-239 {50 Ohm} LO-Z Jack
at the back of the Radio.
-Or- Should your Radio have a set of Twin Termnals
{500 Ohm} HI-Z Connectors : Then simply attach the
end of the single Wire Antenna Element to the Antenna
Terminal and a Ground Wire to the Ground Terminal.
-Or- Should your Radio have a Whip Antenna : Then simply
attach the end of the single Wire Antenna Element to the
Tip of the Whip Antenna.
Which ever one of the above Antenna Wire 'Connections' that
gives you the best results for now -is- The Right Connection [.]
[ To be able to simply Listen to your Radio. ]
yes it is that simple : one wire at a time - iane ~ RHF {pomkia}
.
Shortwave Listener (SWL) Antennas Group => http://tinyurl.com/ogvcf
GoTo => http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
The SWL Antenna Discussion Group => http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna HELP => http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna NEWS => http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna INFO => http://tinyurl.com/ogvcf
* * * All Are Welcome : Including ELMERS and 'Want-to-be-Elmers'
plus plain old "Mister-Know-It-Alls"; and even those Newbees with
"I Know This Is A Really Dumb Question - But _ _ _ _ _ _ _ _ "
.
The Shortwave Listener's Blessing :
SWL BLESSING => http://tinyurl.com/s2bjm
May You Never Tire of Listening to the Radio and Always
have Strong Signals and Noise Free Reception ~ RHF {ibid}
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/9233
.
Tous Sont Bienvenus ! - - - Groupe par Radio
d'auditeur d'onde courte pour des Antennes de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Alle Sind Willkommen ! - - - Shortwave Radiozuhörer
Gruppe für SWL Antennen
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Tutti Sono Benvenuti ! - - - Gruppo Radiofonico
dell'ascoltatore di onda corta per le Antenne di SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Todos São Bem-vindos ! - - - Grupo de Rádio
do ouvinte do Shortwave para Antenas de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Все Радушны ! - - - Группа оператора
на приеме коротковолнового диапазона
Radio для Aнтенн SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
¡Todos Son Agradables! - - - Grupo de Radio del oyente
de la onda corta para las Antenas de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
= = = = Plain Old American-English Translation = = = =
All are Welcome - - - To Join the Shortwave Listeners
(SWL) Antenna Group on YAHOO !
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
|
|
|
/ \
.......!.......
= = = On Jan 24, 6:12 am, Meat Plow <m...@meatplow.local> wrote:
> Anything special needed to make this thing besides the wire and SO-239?
>
> I might want to transmit through this some day using a random wire tuner
> but for now it will be used for SWL.
dxAce
Telamon wrote:
Yep, for proper operation the core material and the number of windings are
important.
dxAce
Michigan
USA
David
I've reverse engineered a bunch of them. The ones with caps are very
rare.
RHF
On Jan 26, 6:11 am, David <rick...@knac.com> wrote:
> On Fri, 26 Jan 2007 02:03:04 GMT, Telamon
>
>
>
>
>
> <telamon_spamshi...@pacbell.net.is.invalid> wrote:
> >In article <kd93u21bdu57opb3t8j4vs8s9jnarr2...@4ax.com>,
> > David <rick...@knac.com> wrote:
>
> >> On Thu, 25 Jan 2007 03:06:28 GMT, Telamon
> >> <telamon_spamshi...@pacbell.net.is.invalid> wrote:
>
> >> >> If you use a cable TV Balun you'll get a quick and dirty 4:1
> >> >> transformer and a marked improvement.
>
> >> >> <http://www.radioshack.com/product/index.jsp?productId=2103912&cp=&sr=...
> >> >> gkw=matching+transformer&kw=matching+transformer&parentPage=search>
>
> >> >Those don't work well below 10 MHz. 15 MHz and higher they are OK.
>
> >> How do you know?
>
> >I tested them.
>
> >> What is the low frequency limiting component?
>
- - I didn't go as far as that.
- - This unit is made of a ferrite core and
- - a couple of very small value capacitors.
- - I would guess the core was the problem.
-
- I've reverse engineered a bunch of them.
- The ones with caps are very rare.
Offhand - I can only come up with two reasons to
put Capacitors in-side a Matching Transformer :
1 - To make it [Narrow] Band Specific {Tuned}
2 - To make it [Wide] Band Rejection {High -or- Low}
I would suspect that any TV type Matching Transformer
that had Capacitors in-side it would be designed to have
them act as part of a Low Band Rejection Filter for the
AM/MW {Shortwave} Band and 'pass' only the Higher
VHF and UHF TV Bands.
somebody educate me please ~ RHF
.
.
. .
Jim Douglas
> On Wed, 24 Jan 2007 12:32:51 -0600, Bob Miller Has Frothed:
>
> google it but there should be some instructions on how to make one myself.
>
nice stuff and little $$ delivered, about $12.00 I believe, their design
seemed to work better than the one's I made from various diagrams on the
web...........
Telamon
David <ric...@knac.com> wrote:
> On Fri, 26 Jan 2007 02:03:04 GMT, Telamon
> <telamon_s...@pacbell.net.is.invalid> wrote:
>
> >In article <kd93u21bdu57opb3t...@4ax.com>,
> > David <ric...@knac.com> wrote:
> >
> >> On Thu, 25 Jan 2007 03:06:28 GMT, Telamon
> >> <telamon_s...@pacbell.net.is.invalid> wrote:
> >>
> >> >
> >> >> If you use a cable TV Balun you'll get a quick and dirty 4:1
> >> >> transformer and a marked improvement.
> >> >>
> >> >> <http://www.radioshack.com/product/index.jsp?productId=2103912&cp=&sr=1&
> >> >> ori
> >> >> gkw=matching+transformer&kw=matching+transformer&parentPage=search>
> >> >
> >> >Those don't work well below 10 MHz. 15 MHz and higher they are OK.
> >>
> >> How do you know?
> >
> >I tested them.
> >
> >> What is the low frequency limiting component?
> >
> >I didn't go as far as that. This unit is made of a ferrite core and a
> >couple of very small value capacitors. I would guess the core was the
> >problem.
>
> I've reverse engineered a bunch of them. The ones with caps are very
> rare.
The one you referenced has the capacitors. I would go with another model.
--
Telamon
Ventura, California
Telamon
"RHF" <rhf-new...@pacbell.net> wrote:
> On Jan 25, 6:03 pm, Telamon
> <telamon_spamshi...@pacbell.net.is.invalid> wrote:
> > In article <kd93u21bdu57opb3t8j4vs8s9jnarr2...@4ax.com>,
> >
> > David <rick...@knac.com> wrote:
> > > On Thu, 25 Jan 2007 03:06:28 GMT, Telamon
> > > <telamon_spamshi...@pacbell.net.is.invalid> wrote:
> >
> > > >> If you use a cable TV Balun you'll get a quick and dirty 4:1
> > > >> transformer and a marked improvement.
> >
> > > >> <http://www.radioshack.com/product/index.jsp?productId=2103912&cp=&sr=. .. gkw=matching+transformer&kw=matching+transformer&parentPage=search>
> >
> > > >Those don't work well below 10 MHz. 15 MHz and higher they are
> > > >OK.
> >
> > > How do you know?
> > >
> > I tested them.
> >
> > What is the low frequency limiting component?I didn't go as far as
> > that. This unit is made of a ferrite core and a couple of very
> > small value capacitors. I would guess the core was the problem.
> >
>
> Some of the better 300 Ohm to 75 Ohm TV type Matching Transformers
> are labeled as being good down to 5 MHz. Usually these are the {Gold
> Plated} ones designed for Cable and Satellite TV used.
>
> ? Honestly ? What good does the Gold Plating do on the "F" Connector
> and the Spade Connectors : When it is the internal components that
> will determine the real quality of the signal entering one end and
> exiting the other.
The gold plating on the contacts is so there is no corrosion or
oxidation on the connector mating surface. If you don't have a good DC
connection you don't have a good circuit for RF either. Gold is a nobel
metal that does not oxidize.
> They work 'ok' for a basic Shortwave Listener (SWL)
> Random Wire Antenna "Matcher" with moderate size
> {Lenght} Antennas in the range of 20-60 Feet.
>
> Plus they have the extra advantage of attenuating those
> High Power AM/MW Radio Stations below 1.8 MHz.
>
>
> at least this has been my experience - speaking
> of "quick and dirty" - hey that's me - iane ~ RHF
Yeah they will do that. Problem is they will not work so well on 41, 49,
60, 75, 90, and 120 either.
--
Telamon
Ventura, California
RHF
On Jan 26, 9:21 am, "RHF" <rhf-newsgro...@pacbell.net> wrote:
> On Jan 26, 6:11 am, David <rick...@knac.com> wrote:
>
>
>
> > On Fri, 26 Jan 2007 02:03:04 GMT, Telamon
>
> > <telamon_spamshi...@pacbell.net.is.invalid> wrote:
> > >In article <kd93u21bdu57opb3t8j4vs8s9jnarr2...@4ax.com>,
> > > David <rick...@knac.com> wrote:
>
> > >> On Thu, 25 Jan 2007 03:06:28 GMT, Telamon
> > >> <telamon_spamshi...@pacbell.net.is.invalid> wrote:
>
> > >> >> If you use a cable TV Balun you'll get a quick and dirty 4:1
> > >> >> transformer and a marked improvement.
>
> > >> >> <http://www.radioshack.com/product/index.jsp?productId=2103912&cp=&sr=...
> > >> >> gkw=matching+transformer&kw=matching+transformer&parentPage=search>
>
> > >> >Those don't work well below 10 MHz. 15 MHz and higher they are OK.
>
> > >> How do you know?
>
> > >I tested them.
>
> > >> What is the low frequency limiting component?- - I didn't go as far as that.
> - - This unit is made of a ferrite core and
> - - a couple of very small value capacitors.
> - - I would guess the core was the problem.
> -
> - I've reverse engineered a bunch of them.
> - The ones with caps are very rare.
>
- Offhand - I can only come up with two reasons to
- put Capacitors in-side a Matching Transformer :
- 1 - To make it [Narrow] Band Specific {Tuned}
- 2 - To make it [Wide] Band Rejection {High -or- Low}
Example - Shortwave Baluns and Accessories
http://www.kintronic.com/site/subassemblies/baluns.asp
Kintronic Laboratories offers two types of Shortwave Baluns.
First is a discrete Discrete Component Shortwave Balun
with Tunable Capacitors to permit a 1:1 Match at any
Frequency in a Single Shortwave (HF) Band of operation.
New Longwire Balun 9:1 Transformer High Performer
-by- LowBander on eBay
http://cgi.ebay.com/_W0QQitemZ180078653482
About Baluns - What is the Best Balun ?
http://dxantennas.com/wst_page4.php
bail-um-out ~ RHF
.
.
. .
>
> I would suspect that any TV type Matching Transformer
> that had Capacitors in-side it would be designed to have
> them act as part of a Low Band Rejection Filter for the
> AM/MW {Shortwave} Band and 'pass' only the Higher
> VHF and UHF TV Bands.
>
> somebody educate me please ~ RHF
> .
> .
> . .- Hide quoted text -- Show quoted text -
Telamon
"RHF" <rhf-new...@pacbell.net> wrote:
> On Jan 26, 9:21 am, "RHF" <rhf-newsgro...@pacbell.net> wrote:
> > On Jan 26, 6:11 am, David <rick...@knac.com> wrote:
> >
> > > On Fri, 26 Jan 2007 02:03:04 GMT, Telamon
> >
> > > <telamon_spamshi...@pacbell.net.is.invalid> wrote:
> > > >In article <kd93u21bdu57opb3t8j4vs8s9jnarr2...@4ax.com>,
> > > > David <rick...@knac.com> wrote:
> >
> > > >> On Thu, 25 Jan 2007 03:06:28 GMT, Telamon
> > > >> <telamon_spamshi...@pacbell.net.is.invalid> wrote:
> >
> > > >> >> If you use a cable TV Balun you'll get a quick and dirty 4:1
> > > >> >> transformer and a marked improvement.
> >
> > > >> >> <http://www.radioshack.com/product/index.jsp?productId=2103912&cp=&s r=... gkw=matching+transformer&kw=matching+transformer&parentPage=search>
< Snip >
That would depend on the application like anything engineered. In
general the current type would be best for Hertzian antennas and I would
only use the voltage type on random/long wire Marconi type antennas.
--
Telamon
Ventura, California
David
<telamon_s...@pacbell.net.is.invalid> wrote:
>The one you referenced has the capacitors. I would go with another model.
I was just showing the picture. If the thing has caps, replace them
with shiny jumpers.
David
<telamon_s...@pacbell.net.is.invalid> wrote:
>
>< Snip >
>
>That would depend on the application like anything engineered. In
>general the current type would be best for Hertzian antennas and I would
>only use the voltage type on random/long wire Marconi type antennas.
dxAce
RHF wrote:
The best ones are the ones I build myself!
I have one that has been in use since 1988.
dxAce
Michigan
USA
Telamon
David <ric...@knac.com> wrote:
Don't let me stop you from doing this and let us know how it works out.
--
Telamon
Ventura, California
Telamon
David <ric...@knac.com> wrote:
What does this have to do with BALUNs?
--
Telamon
Ventura, California
David
<telamon_s...@pacbell.net.is.invalid> wrote:
>In article <laknr2hpuk0ou991g...@4ax.com>,
> David <ric...@knac.com> wrote:
>
>> On Fri, 26 Jan 2007 17:16:54 -0800, Telamon
>> <telamon_s...@pacbell.net.is.invalid> wrote:
>>
>> >The one you referenced has the capacitors. I would go with another model.
>>
>> I was just showing the picture. If the thing has caps, replace them
>> with shiny jumpers.
>
>Don't let me stop you from doing this and let us know how it works out.
It's a quick and dirty junk drawer compromise that's better than
nothing. I prefer the Palomar MLB because they're homies.
David
A random wire is not a Marconi antenna. A Marconi antenna is a 1/4
wave vertical with a formal ground screen/radial system providing a
second 1/4 wave image below the earth which allows the system to load
like (but radiate like) a half-wave antenna. A Marconi antenna is ca.
36 Ohms and needs no 9:1 or 10:1 transformer.
Telamon
David <ric...@knac.com> wrote:
> On Sat, 27 Jan 2007 17:55:17 -0800, Telamon
> <telamon_s...@pacbell.net.is.invalid> wrote:
>
> >In article <coknr2hi5cj4r49eo...@4ax.com>,
> > David <ric...@knac.com> wrote:
> >
> >> On Sat, 27 Jan 2007 12:05:57 -0800, Telamon
> >> <telamon_s...@pacbell.net.is.invalid> wrote:
> >>
> >> >
> >> >< Snip >
> >> >
> >> >That would depend on the application like anything engineered. In
> >> >general the current type would be best for Hertzian antennas and I would
> >> >only use the voltage type on random/long wire Marconi type antennas.
> >>
> >> http://www.moonraker.com.au/techni/quarterwaveverticals.htm
> >
> >What does this have to do with BALUNs?
>
> A random wire is not a Marconi antenna. A Marconi antenna is a 1/4
> wave vertical with a formal ground screen/radial system providing a
> second 1/4 wave image below the earth which allows the system to load
> like (but radiate like) a half-wave antenna. A Marconi antenna is ca.
> 36 Ohms and needs no 9:1 or 10:1 transformer.
A Marconi antenna is not necessarily a quarter wave vertical but is a
quarter wave or longer.
In the beginning of the development of radio technology there came about
two main styles of antennas. A Marconi style is a one element where the
other is a ground. Hertzian's are balanced antennas with two elements in
the air.
Irrespective of antenna style 1/4 wave is a basic element.
Single element antennas can pick up static electricity that can damage
radio front ends. Using a voltage type UNUN is best type to use due to
the separate windings. The voltage type also lends itself to fractional
impedance transformations.
Balanced antennas can be of a closed RF loop design where the higher
efficiency of the current type transformer is a plus and static
electricity is not an issue.
--
Telamon
Ventura, California
David
<telamon_s...@pacbell.net.is.invalid> wrote:
>
>Single element antennas can pick up static electricity that can damage
>radio front ends. Using a voltage type UNUN is best type to use due to
>the separate windings. The voltage type also lends itself to fractional
>impedance transformations.
Shunt Feed.
Delta Match.
Telamon
David <ric...@knac.com> wrote:
I though we were discussing BALUNs.
Shunt feed and delta match are tuned circuits with narrow bandwidth
whereas a BALUN or UNUNs are broadband. SWLs are not transmitting so the
need to tune the antennas output match at some frequency is not
desirable.
--
Telamon
Ventura, California
RHF
On Jan 28, 7:32 pm, Telamon
<telamon_spamshi...@pacbell.net.is.invalid> wrote:
> In article <obcqr2l85fbnhvlvuubbvoqnfioo2nq...@4ax.com>,
>
> David <rick...@knac.com> wrote:
> > On Sun, 28 Jan 2007 17:35:51 GMT, Telamon
> > <telamon_spamshi...@pacbell.net.is.invalid> wrote:
>
> > >Single element antennas can pick up static electricity that can damage
> > >radio front ends. Using a voltage type UNUN is best type to use due to
> > >the separate windings. The voltage type also lends itself to fractional
> > >impedance transformations.
>
> > Shunt Feed.
>
> > Delta Match.I though we were discussing BALUNs.
>
> Shunt feed and delta match are tuned circuits with narrow bandwidth
> whereas a BALUN or UNUNs are broadband. SWLs are not transmitting so the
> need to tune the antennas output match at some frequency is not
> desirable.
>
> --
> Telamon
> Ventura, California
Telamon - Thank you for pointing that out.
The Topic is : About Baluns - What is the Best Balun ?
So . . . Whats between your Shortwave Listening (SWL) Antenna
and the Coax Cable feed-in-line ? ? ? - iane ~ RHF
.
.
. .
David
wrote:
>So . . . Whats between your Shortwave Listening (SWL) Antenna
>and the Coax Cable feed-in-line ? ? ? - iane ~ RHF
> .
> .
>. .
Palomar MLB. I thought we already settled this?
Besides, Paranoid Boy changed the subject to Marconi antennas, which
are not broadband, and then said a transformer was desirable for
grounding and I pointed out 2 feed mechanisms that pass DC ground.
Try to keep up.
Telamon
David <ric...@knac.com> wrote:
You are one funny guy. You tell the OP that the that subject is
something other than what he meant. Sure thing buddy.
The subject and question "About Baluns - What is the Best Balun ?" I
addressed what the best type would be based on antenna type. I did not
change the topic thank you very much.
--
Telamon
Ventura, California
David
Telamon
David <ric...@knac.com> wrote:
> http://www.minicircuits.com/pdfs/T8-1-X65.pdf
>
> http://www.minicircuits.com/pdfs/T14-1-X65.pdf
You do not have the option of isolating the grounds on either model,
which would ordinarily be an advantage of the voltage type of
transformer.
--
Telamon
Ventura, California
RHF
<telamon_spamshi...@pacbell.net.is.invalid> wrote:
> In article <svjur2p80cvjt3aas6kop27u1udtm1d...@4ax.com>,
>
> David <rick...@knac.com> wrote:
> >http://www.minicircuits.com/pdfs/T8-1-X65.pdf
>
> >http://www.minicircuits.com/pdfs/T14-1-X65.pdf
>
> You do not have the option of isolating the grounds on either model,
> which would ordinarily be an advantage of the voltage type of
> transformer.
>
> --
> Telamon
> Ventura, California
Telamon - That is true. -but- Most so called "MLBs"
Magnetic Longwire Baluns are just such 'common
ground' Matching Transformers. iane ~ RHF
.
.
. .
r2000...@hotmail.com
and
secondary are completly isolated. MC transformers are >NOT< a good
choice for 'high" RF field locations. I don't know eaxctly at what
point it happens,
but I ran into big problems with 2nd harmonic distortion when I added
a ground
ring around my home to my ~70' wire antenna. I also expereinced a
number
of mix porducts. 1240+770, 1240-770 1240+2(770) etc. MiniCircuit
transformers
are nice and compact,but the very small size of the ferrite core
limits the
voltage because the micro cores saturate. There are many reports of MC
transfomres getting zapped by static. I never had that problem but the
IMD was a serious issue.
Wind you own on a suitable core.
Terry
Telamon
r2000...@hotmail.com wrote:
According to the schematic of both parts the low side of the primary and
secondary are tied together.
> Wind you own on a suitable core.
Good idea.
--
Telamon
Ventura, California
Telamon
"RHF" <rhf-new...@pacbell.net> wrote:
That's OK for a horizontal wire > 10 foot off the ground but if it is a
Beverage or inverted L for instance then you would start near ground and
you could take advantage of separate grounds.
--
Telamon
Ventura, California
David
Telamon
David <ric...@knac.com> wrote:
I'm well familiar with the Mini-circuits site. I have used their
components in the past.
--
Telamon
Ventura, California
David
<telamon_s...@pacbell.net.is.invalid> wrote:
>In article <6ap2s255mkc6dmo8d...@4ax.com>,
> David <ric...@knac.com> wrote:
>
>> On Tue, 30 Jan 2007 18:38:38 -0800, Telamon
>> <telamon_s...@pacbell.net.is.invalid> wrote:
>>
>> >In article <svjur2p80cvjt3aas...@4ax.com>,
>> > David <ric...@knac.com> wrote:
>> >
>> >> http://www.minicircuits.com/pdfs/T8-1-X65.pdf
>> >>
>> >> http://www.minicircuits.com/pdfs/T14-1-X65.pdf
>> >
>> >You do not have the option of isolating the grounds on either model,
>> >which would ordinarily be an advantage of the voltage type of
>> >transformer.
>>
>> Here ya go, Sparky!
>>
>> http://www.minicircuits.com/products/transformers_pic.html
>
>I'm well familiar with the Mini-circuits site. I have used their
>components in the past.
What about the rest of the viewers?
RHF
> >In article <6ap2s255mkc6dmo8dno58ci3r3rb0cd...@4ax.com>,
>
> >> >In article <svjur2p80cvjt3aas6kop27u1udtm1d...@4ax.com>,
>
> >> >>http://www.minicircuits.com/pdfs/T8-1-X65.pdf
>
> >> >>http://www.minicircuits.com/pdfs/T14-1-X65.pdf
>
> >> >You do not have the option of isolating the grounds on either model,
> >> >which would ordinarily be an advantage of the voltage type of
> >> >transformer.
>
> >> Here ya go, Sparky!
>
> >>http://www.minicircuits.com/products/transformers_pic.html
>
> >I'm well familiar with the Mini-circuits site. I have used their
> >components in the past.
>
>
> - Show quoted text -
David & Telamon,
Now now children be nice to each other.
jftfoi ~ RHF
.
.
. .
tack
>
> - Show quoted text -
Looks like you have to order 25 min
HFguy
>
> Ok does anyone have a link that walks you through selecting the parts,
> winding the balun etc... I'd like to make one but just can't find a decent
> reference.
Go to the following webpage and order item #1542 for $3.00. You'll
receive three T-43 ferrite toroidal cores measuring 1/2-inch in
diameter. You'll need one core to make the balun.
http://www.universal-radio.com/catalog/misc/amidon.html
You can get the wire for winding the balun at your local Radio Shack. It
comes in an assortment of three sizes for $4.99, catalog #278-1345.
Here's the online catalog page for the wire:
When you have the toroids and wire, get back to the group here and we'll
tell you how to wind the balun and/or refer you to a webpage on how to
do it.
Telamon
David <ric...@knac.com> wrote:
> On Fri, 02 Feb 2007 01:58:47 GMT, Telamon
> <telamon_s...@pacbell.net.is.invalid> wrote:
>
> >In article <6ap2s255mkc6dmo8d...@4ax.com>,
> > David <ric...@knac.com> wrote:
> >
> >> On Tue, 30 Jan 2007 18:38:38 -0800, Telamon
> >> <telamon_s...@pacbell.net.is.invalid> wrote:
> >>
> >> >In article <svjur2p80cvjt3aas...@4ax.com>,
> >> > David <ric...@knac.com> wrote:
> >> >
> >> >> http://www.minicircuits.com/pdfs/T8-1-X65.pdf
> >> >>
> >> >> http://www.minicircuits.com/pdfs/T14-1-X65.pdf
> >> >
> >> >You do not have the option of isolating the grounds on either model,
> >> >which would ordinarily be an advantage of the voltage type of
> >> >transformer.
> >>
> >> Here ya go, Sparky!
> >>
> >> http://www.minicircuits.com/products/transformers_pic.html
> >
> >I'm well familiar with the Mini-circuits site. I have used their
> >components in the past.
>
> What about the rest of the viewers?
Well, you did specifically refer to my nickname.
--
Telamon
Ventura, California
RHF
> Filuk The Hogfish-Beater wrote:
>
> > Ok does anyone have a link that walks you through selecting the parts,
> > winding the balun etc... I'd like to make one but just can't find a decent
> > reference.
>
> Go to the following webpage and order item #1542 for $3.00. You'll
> receive three T-43 ferrite toroidal cores measuring 1/2-inch in
> diameter. You'll need one core to make the balun.
>
> http://www.universal-radio.com/catalog/misc/amidon.html
>
> You can get the wire for winding the balun at your local Radio Shack. It
> comes in an assortment of three sizes for $4.99,
- Here's the online catalog page for the wire:
-
- http://tinyurl.com/2fws6t
RadioShack Catalog # 278-1345
315-Feet of Magnet Wire - Set of Three Spools
http://www.radioshack.com/product/index.jsp?productId=2036277
1 - 40-Foot Spool of 22-Gauge Magnet Wire
1 - 75-Foot Spool of 26-Gauge Magnet Wire
1 - 200-Foot Spool of 30-Gauge Magnet Wire
RHF
Do . . .
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/12163
Balun Kit {Toroidal} for Shortwave (HF) 3 MHz to 30 MHz [eBay]
http://cgi.ebay.com/Balun-Kit-Toroidal-Type-3-
30Mhz_W0QQitemZ200032993780
Balun Kits [Universal-Radio - et al]
http://www.universal-radio.com/catalog/misc/amidon.html
http://www.bytemark.com/products/kit_bal1.htm
http://www.amidoncorp.com/aai_cost_experimenter.htm
http://www.surplussales.com/Antennas/Antennas-2.html
Order # Model Description Core Wire Ratios Price Order
#1525 - AB-200-10 - Balun Kit T200-2 @ 14 gauge 10 feet 4:1 or 1:1
#1526 - AB-240-125 - Balun Kit FT-240-61 @ 14 gauge 10 feet 4:1 or
1:1
* Wind 10-Turns for the Coax Cable Winding
* Wind 30-Turns for the Antenna-Ground Winding
* * Check-Out the AU-150A-250 UNUN Kit which includes
a FT 150A-K plus 12FT #14 Thermaleze Wire
The WireMan - Balun Kits #830 & #831
http://thewireman.com/baluns.html
http://www.k1cra.com/catalog/product.aspx?productID=735
Low Power Balun Kit -by- W1CG
http://www.njqrp.org/balun/
http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=12668
TECH REF => Amidon Technical Reference and Product Guide
http://www.universal-radio.com/catalog/misc/1899.html
Although most of these are designed for Amateur Radio {Ham}
use for Transmitting : They can also be used for "Receive Only"
Shortwave Listening (SWL) too.
What's Between Your Shortwave Antenna and Your Coax Cable ?
Can You Spell "B A L U N" -or- 'UnUn' -aka- Matching Transformer !
hope this helps to... balun you out - iane ~ RHF {pomkia}
.
Shortwave Listener (SWL) Antennas Group => http://tinyurl.com/ogvcf
GoTo => http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
The SWL Antenna Discussion Group => http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna HELP => http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna NEWS => http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna INFO => http://tinyurl.com/ogvcf
* * * All Are Welcome : Including ELMERS and 'Want-to-be-Elmers'
plus plain old "Mister-Know-It-Alls"; and even those Newbees with
"I Know This Is A Really Dumb Question - But _ _ _ _ _ _ _ _ "
.
The Shortwave Listener's Blessing :
SWL BLESSING => http://tinyurl.com/s2bjm
May You Never Tire of Listening to the Radio and Always
have Strong Signals and Noise Free Reception ~ RHF {ibid}
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/9233
.
Tous Sont Bienvenus ! - - - Groupe par Radio
d'auditeur d'onde courte pour des Antennes de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Alle Sind Willkommen ! - - - Shortwave Radiozuhörer
Gruppe für SWL Antennen
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Tutti Sono Benvenuti ! - - - Gruppo Radiofonico
dell'ascoltatore di onda corta per le Antenne di SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Todos São Bem-vindos ! - - - Grupo de Rádio
do ouvinte do Shortwave para Antenas de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Все Радушны ! - - - Группа оператора
на приеме коротковолнового диапазона
Radio для Aнтенн SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
¡Todos Son Agradables! - - - Grupo de Radio del oyente
de la onda corta para las Antenas de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
= = = = Plain Old American-English Translation = = = =
All are Welcome - - - To Join the Shortwave Listeners
(SWL) Antenna Group on YAHOO !
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
|
|
|
/ \
.......!.......
dxAce
Filuk The Hogfish-Beater wrote:
> On Fri, 02 Feb 2007 22:50:25 -0800, RHF Has Frothed:
> Thank you all, will visit a local electronics shop (true electronics shop
> that has lots of goodies, not Radio Slack) and pick these or their equivs
> up.
http://members.aol.com/DXerCapeCod/z_transformers.pdf
http://www.dxing.info/equipment/impedance_matching_bryant.pdf
dxAce
Michigan
USA
David
>
>
>Looks like you have to order 25 min
You are WRONG! Ellanawor Klift!
RHF
> On 1 Feb 2007 20:49:21 -0800, "tack" <t...@flash.net> wrote:
>
>
>
> >Looks like you have to order 25 min
>
> You are WRONG! Ellanawor Klift!
David - That would be "Eleanor Clift".
http://en.wikipedia.org/wiki/Eleanor_Clift
http://www.foxnews.com/story/0,2933,2635,00.html
Married William Brooks Clift the brother of the Actor
"Montgomery Clift" {From Here To Eternity}
http://www.nndb.com/people/227/000117873/
http://en.wikipedia.org/wiki/Montgomery_Clift
"Capitol Letter" a weekly Newsweek.com and MSNBC feature
-by- Newsweek contributing editor Eleanor Clift
http://www.msnbc.msn.com/id/6890358/site/newsweek/
http://feeds.newsweek.com/newsweek/columnists/EleanorClift
The McLaughlin Group (TMG)
http://www.mclaughlin.com/about/bio.asp?pid=13
http://en.wikipedia.org/wiki/The_McLaughlin_Group
- - - The Usual Suspects at TMG
http://www.mclaughlin.com/about/group.asp
John McLaughlin - TV Host of "The McLaughlin Group" http://
en.wikipedia.org/wiki/John_McLaughlin_%28host%29
Who is a former Jesuit Priest and graduate of Boston College
http://www.nndb.com/people/629/000061446/
http://en.wikipedia.org/wiki/Boston_College
About the "Society of Jesus" -aka- The Jesuits
http://en.wikipedia.org/wiki/Society_of_Jesus
http://www.nndb.com/org/840/000114498/
- - - Saint Ignatius of Loyola
http://www.nndb.com/people/626/000094344/
as always - more than you wanted to know ~ RHF
.
.
. .
Larry Dighera
Workman HF Dipole Antenna
Frequency Range 40M, 20M, 17M, 15M, 12M, 11M, 10M, 2M, 220 MHz, 440
MHz.
$21.00. Ready to erect.