|
60 Foot Random Wire Shortwave [SWL] Antenna ?
On Feb 5, 2:32*pm, bpnjensen wrote:
On Feb 5, 12:55*pm, RHF wrote: On Feb 4, 10:05*pm, bpnjensen wrote: 2-5-2011, GUATEMALA, R. Verdad (tent), 4052.5 AM, very weak SS, apparent *conversation, SINPO 15231. *Not sure what they are using for a TX now, but fair signal. - Bruce Jensen, CA, USA "CA" is a big place north to south "SF Bay Area, CA, USA" would be nicer :o) *. - R75 & 60 foot random wire BpnJ is this "60 foot random wire" your newly built Shortwave [SWL] Antenna ? -or- an older existing Shortwave Antenna ? ? I thought it was an Inverted "L" Antenna ! -not-just-a- Straight Horizontal 'Flat' Wire Antenna ? *IF* the newly built SWL Antenna is an Inverted "L" Antenna ? How many Feet in the Up-Vertical-Leg ? -and- How many Feet in the Out-Horizontal-Arm ? =Total= Combined Feet of the Antenna Wire +Plus+ The general 'Lay' {Direction} of the Horizontal Antenna Wire from the the Up-Vertical-Leg out to the Far-End of the Out-Horizontal-Arm : N & NE & E & SE & S & SW & W & NW & N iwtk ~ RHF *. *. - It's the new one. Well, yes, that's right, an inverted L. The - vertical is about 30 feet, the horizontal about 60. Oriented nearly - north-south (not checked with a compass), far end is south. Guatemala - is off the forward left side if you looking the direction the antenna - is aimed. BpnJ, 'The Antenna's Size' is "The Antenna's Size" : A Fixed Point -how-ever- as the Frequency Varies for 500 kHs to 1 MHz to 2 MHz to 4 MHz to 8 MHz to 16 MHz to 32 MHz the Propagation Characteristics of the Antenna ~change~ So having the Vertical-Up-Leg as your Starting Reference Point and your Far-End as your End-Point should/would allow you to have an Idea {Hunch} about the Receiving Properties of your Fixed Size Antenna on any given High {Shortwave} Frequency [HF]. |
60 Foot Random Wire Shortwave [SWL] Antenna ?
On Feb 5, 2:32*pm, bpnjensen wrote:
On Feb 5, 12:55*pm, RHF wrote: On Feb 4, 10:05*pm, bpnjensen wrote: 2-5-2011, GUATEMALA, R. Verdad (tent), 4052.5 AM, very weak SS, apparent *conversation, SINPO 15231. *Not sure what they are using for a TX now, but fair signal. - Bruce Jensen, CA, USA "CA" is a big place north to south "SF Bay Area, CA, USA" would be nicer :o) *. - R75 & 60 foot random wire BpnJ is this "60 foot random wire" your newly built Shortwave [SWL] Antenna ? -or- an older existing Shortwave Antenna ? ? I thought it was an Inverted "L" Antenna ! -not-just-a- Straight Horizontal 'Flat' Wire Antenna ? *IF* the newly built SWL Antenna is an Inverted "L" Antenna ? How many Feet in the Up-Vertical-Leg ? -and- How many Feet in the Out-Horizontal-Arm ? =Total= Combined Feet of the Antenna Wire +Plus+ The general 'Lay' {Direction} of the Horizontal Antenna Wire from the the Up-Vertical-Leg out to the Far-End of the Out-Horizontal-Arm : N & NE & E & SE & S & SW & W & NW & N iwtk ~ RHF *. *. It's the new one. *Well, yes, that's right, an inverted L. *The vertical is about 30 feet, the horizontal about 60. *Oriented nearly north-south (not checked with a compass), far end is south. *Guatemala is off the forward left side if you looking the direction the antenna is aimed. How much does the 30 vertical do for you, other than collect vertically polarized QRM? *The only reason, really, I built it this way was to allow the 9:1 antenna unun to be mounted near ground (the ground is not in place yet, but will be soon). - Otherwise, I would have put the whole thing up high, - or possibly sloped with the unun end down. Better would be to have the Feed-in-Line running 4"~6" below the Ground directly under the Wire Antenna Element all the way out to the UnUn and Ground Rod; with the Antenna Element Sloping-Up back over the 'lay' of the Feed-in-Line. ~ RHF |
60 Foot Random Wire Shortwave [SWL] Antenna ?
On 02/06/2011 02:14 AM, RHF wrote:
On Feb 5, 2:32 pm, wrote: . - The only reason, really, I built it this way was to - allow the 9:1 antenna unun to be mounted near - ground (the ground is not in place yet, but will be - soon). Otherwise, I would have put the whole thing - up high, or possibly sloped with the unun end down. Close to the Ground is 'good'. . - This morning (1800z onward), the VOA relays from - MDG and BOT (Africa) on 16 and 19 meters were - coming in almost like locals. - - Bruce Real slopers have the feedpoint at the top. |
60 Foot Random Wire Shortwave [SWL] Antenna ?
On 02/06/2011 02:32 AM, RHF wrote:
Better would be to have the Feed-in-Line running 4"~6" below the Ground directly under the Wire Antenna Element all the way out to the UnUn and Ground Rod; with the Antenna Element Sloping-Up back over the 'lay' of the Feed-in-Line. Why not elevate the transmission line overhead and implement a switching arrangement to turn the mess above into a delta loop if needed for fun and education on certain bands. What would the circumference be?? |
60 Foot Random Wire Shortwave [SWL] Antenna ?
On Feb 6, 2:14*am, RHF wrote:
On Feb 5, 2:32*pm, bpnjensen wrote: On Feb 5, 12:55*pm, RHF wrote: On Feb 4, 10:05*pm, bpnjensen wrote: 2-5-2011, GUATEMALA, R. Verdad (tent), 4052.5 AM, very weak SS, apparent *conversation, SINPO 15231. *Not sure what they are using for a TX now, but fair signal. - Bruce Jensen, CA, USA "CA" is a big place north to south "SF Bay Area, CA, USA" would be nicer :o) *. - R75 & 60 foot random wire BpnJ is this "60 foot random wire" your newly built Shortwave [SWL] Antenna ? -or- an older existing Shortwave Antenna ? ? I thought it was an Inverted "L" Antenna ! -not-just-a- Straight Horizontal 'Flat' Wire Antenna ? *IF* the newly built SWL Antenna is an Inverted "L" Antenna ? How many Feet in the Up-Vertical-Leg ? -and- How many Feet in the Out-Horizontal-Arm ? =Total= Combined Feet of the Antenna Wire +Plus+ The general 'Lay' {Direction} of the Horizontal Antenna Wire from the the Up-Vertical-Leg out to the Far-End of the Out-Horizontal-Arm : N & NE & E & SE & S & SW & W & NW & N iwtk ~ RHF *. *. - It's the new one. *Well, yes, that's right, an inverted L. *The - vertical is about 30 feet, the horizontal about 60. *Oriented nearly - north-south (not checked with a compass), far end is south. Guatemala - is off the forward left side if you looking the direction the antenna - is aimed. BpnJ, 'The Antenna's Size' is "The Antenna's Size" : A Fixed Point -how-ever- as the Frequency Varies for 500 kHs to 1 MHz to 2 MHz to 4 MHz *to 8 MHz *to 16 MHz *to 32 MHz the Propagation Characteristics of the Antenna ~change~ So having the Vertical-Up-Leg as your Starting Reference Point and your Far-End as your End-Point should/would allow you to have an Idea {Hunch} about the Receiving Properties of your Fixed Size Antenna on any given High {Shortwave} Frequency [HF]. *. *. - How much does the 30 vertical do for you, other than - collect vertically polarized QRM? How better to get to your 60 Foot Out-Horizontal-Arm 1/3rd Omni-Direction Vertical Antenna +plus+ 2/3rds Off-the-Sides Horizontal Antenna* -and- 45 Degree Out-from-the-Sides Horizontal Antenna* -and- Off-the-End Horizontal Antenna* * Depending on the Frequency *. - The only reason, really, I built it this way was to - allow the 9:1 antenna *unun to be mounted near - ground (the ground is not in place yet, but will be - soon). *Otherwise, I would have put the whole thing - up high, or possibly sloped with the unun end down. Close to the Ground is 'good'. *. - This morning (1800z onward), the VOA relays from - MDG and BOT (Africa) on 16 and 19 meters were - coming in almost like locals. - - Bruce Strong Signals and less noise is good too :o) ~ RHF *. *. Actually, isn't the directionality of a wire along it's axis? That's how the PAR end-fed SWL antenna is, according to Dale... |
60 Foot Random Wire Shortwave [SWL] Antenna ?
On Feb 6, 6:09*am, dave wrote:
On 02/06/2011 02:14 AM, RHF wrote: On Feb 5, 2:32 pm, *wrote: * . - The only reason, really, I built it this way was to - allow the 9:1 antenna *unun to be mounted near - ground (the ground is not in place yet, but will be - soon). *Otherwise, I would have put the whole thing - up high, or possibly sloped with the unun end down. Close to the Ground is 'good'. * . - This morning (1800z onward), the VOA relays from - MDG and BOT (Africa) on 16 and 19 meters were - coming in almost like locals. - - Bruce Real slopers have the feedpoint at the top. Yepp, but then it's a lot harder to get the thing grounded. Either way, you still get a more omni pattern. |
60 Foot Random Wire Shortwave [SWL] Antenna ?
On Feb 6, 2:32*am, RHF wrote:
.. - Otherwise, I would have put the whole thing up high, - or possibly sloped with the unun end down. Better would be to have the Feed-in-Line running 4"~6" below the Ground directly under the Wire Antenna Element all the way out to the UnUn and Ground Rod; with the Antenna Element Sloping-Up back over the 'lay' of the Feed-in-Line. ~ RHF Why is the alignment important? |
60 Foot Random Wire Shortwave [SWL] Antenna ?
On 02/06/2011 09:08 AM, bpnjensen wrote:
On Feb 6, 2:14 am, wrote: On Feb 5, 2:32 pm, wrote: On Feb 5, 12:55 pm, wrote: On Feb 4, 10:05 pm, wrote: 2-5-2011, GUATEMALA, R. Verdad (tent), 4052.5 AM, very weak SS, apparent conversation, SINPO 15231. Not sure what they are using for a TX now, but fair signal. - Bruce Jensen, CA, USA "CA" is a big place north to south "SF Bay Area, CA, USA" would be nicer :o) . - R75& 60 foot random wire BpnJ is this "60 foot random wire" your newly built Shortwave [SWL] Antenna ? -or- an older existing Shortwave Antenna ? ? I thought it was an Inverted "L" Antenna ! -not-just-a- Straight Horizontal 'Flat' Wire Antenna ? *IF* the newly built SWL Antenna is an Inverted "L" Antenna ? How many Feet in the Up-Vertical-Leg ? -and- How many Feet in the Out-Horizontal-Arm ? =Total= Combined Feet of the Antenna Wire +Plus+ The general 'Lay' {Direction} of the Horizontal Antenna Wire from the the Up-Vertical-Leg out to the Far-End of the Out-Horizontal-Arm : N& NE& E& SE & S& SW& W& NW& N iwtk ~ RHF . . - It's the new one. Well, yes, that's right, an inverted L. The - vertical is about 30 feet, the horizontal about 60. Oriented nearly - north-south (not checked with a compass), far end is south. Guatemala - is off the forward left side if you looking the direction the antenna - is aimed. BpnJ, 'The Antenna's Size' is "The Antenna's Size" : A Fixed Point -how-ever- as the Frequency Varies for 500 kHs to 1 MHz to 2 MHz to 4 MHz to 8 MHz to 16 MHz to 32 MHz the Propagation Characteristics of the Antenna ~change~ So having the Vertical-Up-Leg as your Starting Reference Point and your Far-End as your End-Point should/would allow you to have an Idea {Hunch} about the Receiving Properties of your Fixed Size Antenna on any given High {Shortwave} Frequency [HF]. . . - How much does the 30 vertical do for you, other than - collect vertically polarized QRM? How better to get to your 60 Foot Out-Horizontal-Arm 1/3rd Omni-Direction Vertical Antenna +plus+ 2/3rds Off-the-Sides Horizontal Antenna* -and- 45 Degree Out-from-the-Sides Horizontal Antenna* -and- Off-the-End Horizontal Antenna* * Depending on the Frequency . - The only reason, really, I built it this way was to - allow the 9:1 antenna unun to be mounted near - ground (the ground is not in place yet, but will be - soon). Otherwise, I would have put the whole thing - up high, or possibly sloped with the unun end down. Close to the Ground is 'good'. . - This morning (1800z onward), the VOA relays from - MDG and BOT (Africa) on 16 and 19 meters were - coming in almost like locals. - - Bruce Strong Signals and less noise is good too :o) ~ RHF . . Actually, isn't the directionality of a wire along it's axis? That's how the PAR end-fed SWL antenna is, according to Dale... That is a very complicated subject. Usually a wire close to the ground has a pattern between a kaleidoscope and a butterfly on acid. Seriously, like a butterfly more often than not, with various lobes and nulls depending on the frequency. |
60 Foot Random Wire Shortwave [SWL] Antenna ?
On 02/06/2011 09:10 AM, bpnjensen wrote:
On Feb 6, 2:32 am, wrote: . - Otherwise, I would have put the whole thing up high, - or possibly sloped with the unun end down. Better would be to have the Feed-in-Line running 4"~6" below the Ground directly under the Wire Antenna Element all the way out to the UnUn and Ground Rod; with the Antenna Element Sloping-Up back over the 'lay' of the Feed-in-Line. ~ RHF Why is the alignment important? I was playing along but wondered the same thing. |
Many Types and Configurations of "Sloper" Antennas
On Feb 6, 6:09*am, dave wrote:
On 02/06/2011 02:14 AM, RHF wrote: On Feb 5, 2:32 pm, *wrote: * . - The only reason, really, I built it this way was to - allow the 9:1 antenna *unun to be mounted near - ground (the ground is not in place yet, but will be - soon). *Otherwise, I would have put the whole thing - up high, or possibly sloped with the unun end down. Close to the Ground is 'good'. * . - This morning (1800z onward), the VOA relays from - MDG and BOT (Africa) on 16 and 19 meters were - coming in almost like locals. - - Bruce Real slopers have the feedpoint at the top. Dave a "Sloper" Antenna gets it's name from the fact that the Wire Antenna Element is 'Sloping' : There are many 'types' of so-called "Sloper" Antennas -and- Many 'configurations' of so-called "Sloper" Antennas -all- Built for a specific Radio Listening {Broadcasting} needs and equally practical 'design' considerations. |
| All times are GMT +1. The time now is 08:28 PM. |
Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
RadioBanter.com