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Why Antenna Tuners Aren't Necessarily Useful for Shortwave Listening - Question Shortwave Listening (SWL) Antenna Tuners - Do You Have An Opinion ?
On 7 Mar 2006 23:50:11 -0800, "RHF"
wrote: For One and All, QUESTION - Shortwave Listening (SWL) Antenna Tuners - - - Do You Have An Opinion ? - - - Why Antenna Tuners Aren't Necessarily Useful for Shortwave Listening http://www.nyx.net/~dgrunber/tuner.ssi - - - by - - - Daniel A. Grunberg The same argument could be used to say, "Why 9-to-1 Baluns Aren't Necessarily Useful for Shortwave Listening." Bob k5qwg |
Why Antenna Tuners Aren't Necessarily Useful for Shortwave Listening - Question Shortwave Listening (SWL) Antenna Tuners - Do You Have An Opinion ?
On Wed, 08 Mar 2006 14:58:45 GMT, Bob Miller
wrote: On 7 Mar 2006 23:50:11 -0800, "RHF" wrote: For One and All, QUESTION - Shortwave Listening (SWL) Antenna Tuners - - - Do You Have An Opinion ? - - - Why Antenna Tuners Aren't Necessarily Useful for Shortwave Listening http://www.nyx.net/~dgrunber/tuner.ssi - - - by - - - Daniel A. Grunberg The same argument could be used to say, "Why 9-to-1 Baluns Aren't Necessarily Useful for Shortwave Listening." Bob k5qwg If one is a true RF professional the idea of putting a Hi Z generator into a Low Z load is too much. The 9:1 autotransormer also puts every part of the antenna at DC ground, thus protecting the radio's input. Plus, it's a very elegant way to connect the wire to the shielded cable. |
Why Antenna Tuners Aren't Necessarily Useful for Shortwave Listening - Question Shortwave Listening (SWL) Antenna Tuners - Do You Have An Opinion ?
On Wed, 08 Mar 2006 15:17:18 GMT, David wrote:
On Wed, 08 Mar 2006 14:58:45 GMT, Bob Miller wrote: On 7 Mar 2006 23:50:11 -0800, "RHF" wrote: For One and All, QUESTION - Shortwave Listening (SWL) Antenna Tuners - - - Do You Have An Opinion ? - - - Why Antenna Tuners Aren't Necessarily Useful for Shortwave Listening http://www.nyx.net/~dgrunber/tuner.ssi - - - by - - - Daniel A. Grunberg The same argument could be used to say, "Why 9-to-1 Baluns Aren't Necessarily Useful for Shortwave Listening." Bob k5qwg If one is a true RF professional the idea of putting a Hi Z generator into a Low Z load is too much. The 9:1 autotransormer also puts every part of the antenna at DC ground, thus protecting the radio's input. Plus, it's a very elegant way to connect the wire to the shielded cable. Still, you have that wonderfully sensitive receiver, and your balun hasn't changed the signal to noise ratio; it's only made everthing louder. Same argument he's using against antenna tuners :-) bob k5qwg |
Why Antenna Tuners Aren't Necessarily Useful for Shortwave Listening - Question Shortwave Listening (SWL) Antenna Tuners - Do You Have An Opinion ?
On Wed, 08 Mar 2006 17:05:33 GMT, Bob Miller
wrote: Still, you have that wonderfully sensitive receiver, and your balun hasn't changed the signal to noise ratio; it's only made everthing louder. Same argument he's using against antenna tuners :-) bob k5qwg It does help signal:noise. It keeps the antenna away from the house. |
Why Antenna Tuners Aren't Necessarily Useful for Shortwave Listening - Question Shortwave Listening (SWL) Antenna Tuners - Do You Have An Opinion ?
On Wed, 08 Mar 2006 18:40:32 GMT, David wrote:
On Wed, 08 Mar 2006 17:05:33 GMT, Bob Miller wrote: Still, you have that wonderfully sensitive receiver, and your balun hasn't changed the signal to noise ratio; it's only made everthing louder. Same argument he's using against antenna tuners :-) bob k5qwg It does help signal:noise. It keeps the antenna away from the house. And the rest of the noise? Powerlines, atmospheric noise, heterodynes, etcetera? And do you really think coax keeps manmade noise out? bob k5qwg |
Why Antenna Tuners Aren't Necessarily Useful for Shortwave Listening - Question Shortwave Listening (SWL) Antenna Tuners - Do You Have An Opinion ?
On Wed, 08 Mar 2006 20:27:57 GMT, Bob Miller
wrote: On Wed, 08 Mar 2006 18:40:32 GMT, David wrote: On Wed, 08 Mar 2006 17:05:33 GMT, Bob Miller wrote: Still, you have that wonderfully sensitive receiver, and your balun hasn't changed the signal to noise ratio; it's only made everthing louder. Same argument he's using against antenna tuners :-) bob k5qwg It does help signal:noise. It keeps the antenna away from the house. And the rest of the noise? Powerlines, atmospheric noise, heterodynes, etcetera? And do you really think coax keeps manmade noise out? bob k5qwg It keeps the noise I make out of my radio. |
Why Antenna Tuners Aren't Necessarily Useful for Shortwave Listening - Question Shortwave Listening (SWL) Antenna Tuners - Do You Have An Opinion ?
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Why Antenna Tuners Aren't Necessarily Useful for Shortwave Listening - Question Shortwave Listening (SWL) Antenna Tuners - Do You Have An Opinion ?
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Why Antenna Tuners Aren't Necessarily Useful for Shortwave Listening - Question Shortwave Listening (SWL) Antenna Tuners - Do You Have An Opinion ?
Telamon wrote in
: In article . com, wrote: If one is a true RF professional the idea of putting a Hi Z generator into a Low Z load is too much. LOL...A true RF pro probably wouldn't use a random wire in the first place.. :/ They work well in a low local noise location. A random or long wire could be a good reference antenna against a new design. And a wire is also quick & Cheap, when you need something in a hurry. |
Why Antenna Tuners Aren't Necessarily Useful for Shortwave Listening - Question Shortwave Listening (SWL) Antenna Tuners - Do You Have An Opinion ?
They work well in a low local noise location.
As will nearly anything. A random or long wire could be a good reference antenna against a new design. To me, a random wire would be a poor reference antenna. To me, there are basically two reference antennas. The horizontal dipole, which would be the reference for horizontal antennas, and the 1/4 monopole, which would be a reference to compare against vertical antennas. For elevated verticals, I use the 1/4 wave ground plane as the reference antenna. A random wire is much too random. The antennas I use as benchmarks all have well known and repeatable performance. All my horizontal wire antennas are compared to the 1/2 wave dipole. BTW, not many win either, unless they are gain antennas. As far as efficiency on a certain band, it's hard to beat a coax fed dipole. And thusly, it's my usual "benchmark" antenna. MK |
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