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#31
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60 Foot Random Wire Shortwave [SWL] Antenna ?
On Feb 8, 12:22*pm, D Peter Maus wrote:
On 2/8/11 11:06 , bpnjensen wrote: On Feb 5, 3:35 pm, "D. Peter *wrote: * * You do have a quite a bit of antenna, there. Verify that you've not got too much. Look for images, indicating overload. A pad may be required. FWIW, I have found that this new antenna, even before the unun is grounded, works *extremely* well on almost all bands for elimination of electrical hash noise with my DX-Ultra and MFJ-1026. *I can lop off 4-8 S-Units of hash noise while scarcely touching the desired signal, leaving otherwise obscured signals either in the clear or almost so. It has brought otherwise undetectable signals to easy copy. *Right now, I'm wishing I had room for two of them - I could silence 60 and 90 meters background with them. Maybe I'll take down the DX-Ultra and put up another one of these. I'd hate to lose the DX-U (it's great on everything 41 meters and up), but two matched antennae on the MFJ-1026 would work wonders, I think. Bruce * *Excellent. This is good to hear. Congratulations.- Hide quoted text - - Show quoted text - Without counting all my chickens before they hatch, I will say I am very pleased - and grateful to you, Peter, and the other folks including Roy, Dave, Kevin, MII and others who have chimed in with their help and advice. Thanks! |
#32
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60 Foot Random Wire Shortwave [SWL] Antenna ?
On Feb 8, 2:27*pm, D Peter Maus wrote:
On 2/8/11 16:03 , bpnjensen wrote: On Feb 8, 12:22 pm, D Peter *wrote: On 2/8/11 11:06 , bpnjensen wrote: On Feb 5, 3:35 pm, "D. Peter * *wrote: * * *You do have a quite a bit of antenna, there. Verify that you've not got too much. Look for images, indicating overload. A pad may be required. FWIW, I have found that this new antenna, even before the unun is grounded, works *extremely* well on almost all bands for elimination of electrical hash noise with my DX-Ultra and MFJ-1026. *I can lop off 4-8 S-Units of hash noise while scarcely touching the desired signal, leaving otherwise obscured signals either in the clear or almost so. It has brought otherwise undetectable signals to easy copy. *Right now, I'm wishing I had room for two of them - I could silence 60 and 90 meters background with them. Maybe I'll take down the DX-Ultra and put up another one of these. I'd hate to lose the DX-U (it's great on everything 41 meters and up), but two matched antennae on the MFJ-1026 would work wonders, I think. Bruce * * Excellent. This is good to hear. Congratulations.- Hide quoted text - - Show quoted text - Without counting all my chickens before they hatch, I will say I am very pleased - and grateful to you, Peter, and the other folks including Roy, Dave, Kevin, MII and others who have chimed in with their help and advice. *Thanks! * *Always glad to help in what marginal way I may, Bruce. * *If you've had THAT kind of noise reduction, you're going to enjoy a whole new world of listening. * *I know you've mentioned it before, but I've had lunch since then...which receiver are you feeding with this?- Hide quoted text - - Show quoted text - LOL! Three of them - Icom R75, Allied SX-190 and a DX-160. |
#33
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60 Foot Random Wire Shortwave [SWL] Antenna ?
On 2/8/11 16:39 , bpnjensen wrote:
On Feb 8, 2:27 pm, D Peter wrote: On 2/8/11 16:03 , bpnjensen wrote: On Feb 8, 12:22 pm, D Peter wrote: On 2/8/11 11:06 , bpnjensen wrote: On Feb 5, 3:35 pm, "D. Peter wrote: You do have a quite a bit of antenna, there. Verify that you've not got too much. Look for images, indicating overload. A pad may be required. FWIW, I have found that this new antenna, even before the unun is grounded, works *extremely* well on almost all bands for elimination of electrical hash noise with my DX-Ultra and MFJ-1026. I can lop off 4-8 S-Units of hash noise while scarcely touching the desired signal, leaving otherwise obscured signals either in the clear or almost so. It has brought otherwise undetectable signals to easy copy. Right now, I'm wishing I had room for two of them - I could silence 60 and 90 meters background with them. Maybe I'll take down the DX-Ultra and put up another one of these. I'd hate to lose the DX-U (it's great on everything 41 meters and up), but two matched antennae on the MFJ-1026 would work wonders, I think. Bruce Excellent. This is good to hear. Congratulations.- Hide quoted text - - Show quoted text - Without counting all my chickens before they hatch, I will say I am very pleased - and grateful to you, Peter, and the other folks including Roy, Dave, Kevin, MII and others who have chimed in with their help and advice. Thanks! Always glad to help in what marginal way I may, Bruce. If you've had THAT kind of noise reduction, you're going to enjoy a whole new world of listening. I know you've mentioned it before, but I've had lunch since then...which receiver are you feeding with this?- Hide quoted text - - Show quoted text - LOL! Three of them - Icom R75, Allied SX-190 and a DX-160. Oh, that's right...you discussed that SX-190 at some length. Duh... And I remember being envious because of it. So, how does it handle now that you've got a reasonably quiet antenna on the front end? And how does it compare to R75? |
#34
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60 Foot Random Wire Shortwave [SWL] Antenna ?
On Feb 8, 2:42*pm, "D. Peter Maus" wrote:
On 2/8/11 16:39 , bpnjensen wrote: On Feb 8, 2:27 pm, D Peter *wrote: On 2/8/11 16:03 , bpnjensen wrote: On Feb 8, 12:22 pm, D Peter * *wrote: On 2/8/11 11:06 , bpnjensen wrote: On Feb 5, 3:35 pm, "D. Peter * * *wrote: * * * You do have a quite a bit of antenna, there. Verify that you've not got too much. Look for images, indicating overload. A pad may be required. FWIW, I have found that this new antenna, even before the unun is grounded, works *extremely* well on almost all bands for elimination of electrical hash noise with my DX-Ultra and MFJ-1026. *I can lop off 4-8 S-Units of hash noise while scarcely touching the desired signal, leaving otherwise obscured signals either in the clear or almost so.. It has brought otherwise undetectable signals to easy copy. *Right now, I'm wishing I had room for two of them - I could silence 60 and 90 meters background with them. Maybe I'll take down the DX-Ultra and put up another one of these. I'd hate to lose the DX-U (it's great on everything 41 meters and up), but two matched antennae on the MFJ-1026 would work wonders, I think. Bruce * * *Excellent. This is good to hear. Congratulations.- Hide quoted text - - Show quoted text - Without counting all my chickens before they hatch, I will say I am very pleased - and grateful to you, Peter, and the other folks including Roy, Dave, Kevin, MII and others who have chimed in with their help and advice. *Thanks! * * Always glad to help in what marginal way I may, Bruce. * * If you've had THAT kind of noise reduction, you're going to enjoy a whole new world of listening. * * I know you've mentioned it before, but I've had lunch since then...which receiver are you feeding with this?- Hide quoted text - - Show quoted text - LOL! *Three of them - Icom R75, Allied SX-190 and a DX-160. * *Oh, that's right...you discussed that SX-190 at some length. Duh.... * *And I remember being envious because of it. * *So, how does it handle now that you've got a reasonably quiet antenna on the front end? * *And how does it compare to R75?- Hide quoted text - - Show quoted text - The R75 is considerably more sensitive and/or with a better s/n ratio, given the same antenna system. Things are fairly audible on the R75 that are in the hash on the SX-190. Still, the SX-190 is a bunch of fun. For a bad hum, I need to get either a capacitor replacement on the power supply, or figure out the wiring on the 12VDC plug (an oddly configured 4-prong socket) and see if that does the trick. Also might be some bad caps in the audio chain. |
#35
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60 Foot Random Wire Shortwave [SWL] Antenna ?
On 2/8/11 16:49 , bpnjensen wrote:
On Feb 8, 2:42 pm, "D. Peter wrote: On 2/8/11 16:39 , bpnjensen wrote: On Feb 8, 2:27 pm, D Peter wrote: On 2/8/11 16:03 , bpnjensen wrote: On Feb 8, 12:22 pm, D Peter wrote: On 2/8/11 11:06 , bpnjensen wrote: On Feb 5, 3:35 pm, "D. Peter wrote: You do have a quite a bit of antenna, there. Verify that you've not got too much. Look for images, indicating overload. A pad may be required. FWIW, I have found that this new antenna, even before the unun is grounded, works *extremely* well on almost all bands for elimination of electrical hash noise with my DX-Ultra and MFJ-1026. I can lop off 4-8 S-Units of hash noise while scarcely touching the desired signal, leaving otherwise obscured signals either in the clear or almost so. It has brought otherwise undetectable signals to easy copy. Right now, I'm wishing I had room for two of them - I could silence 60 and 90 meters background with them. Maybe I'll take down the DX-Ultra and put up another one of these. I'd hate to lose the DX-U (it's great on everything 41 meters and up), but two matched antennae on the MFJ-1026 would work wonders, I think. Bruce Excellent. This is good to hear. Congratulations.- Hide quoted text - - Show quoted text - Without counting all my chickens before they hatch, I will say I am very pleased - and grateful to you, Peter, and the other folks including Roy, Dave, Kevin, MII and others who have chimed in with their help and advice. Thanks! Always glad to help in what marginal way I may, Bruce. If you've had THAT kind of noise reduction, you're going to enjoy a whole new world of listening. I know you've mentioned it before, but I've had lunch since then...which receiver are you feeding with this?- Hide quoted text - - Show quoted text - LOL! Three of them - Icom R75, Allied SX-190 and a DX-160. Oh, that's right...you discussed that SX-190 at some length. Duh... And I remember being envious because of it. So, how does it handle now that you've got a reasonably quiet antenna on the front end? And how does it compare to R75?- Hide quoted text - - Show quoted text - The R75 is considerably more sensitive and/or with a better s/n ratio, given the same antenna system. Things are fairly audible on the R75 that are in the hash on the SX-190. Still, the SX-190 is a bunch of fun. For a bad hum, I need to get either a capacitor replacement on the power supply, or figure out the wiring on the 12VDC plug (an oddly configured 4-prong socket) and see if that does the trick. Also might be some bad caps in the audio chain. Given its age, a few questionable caps should be expected. A couple of hours with a fine soldering iron will do wonders. |
#36
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60 Foot Random Wire Shortwave [SWL] Antenna ?
On Feb 8, 2:39*pm, bpnjensen wrote:
On Feb 8, 2:27*pm, D Peter Maus wrote: On 2/8/11 16:03 , bpnjensen wrote: On Feb 8, 12:22 pm, D Peter *wrote: On 2/8/11 11:06 , bpnjensen wrote: On Feb 5, 3:35 pm, "D. Peter * *wrote: * * *You do have a quite a bit of antenna, there. Verify that you've not got too much. Look for images, indicating overload. A pad may be required. FWIW, I have found that this new antenna, even before the unun is grounded, works *extremely* well on almost all bands for elimination of electrical hash noise with my DX-Ultra and MFJ-1026. *I can lop off 4-8 S-Units of hash noise while scarcely touching the desired signal, leaving otherwise obscured signals either in the clear or almost so.. It has brought otherwise undetectable signals to easy copy. *Right now, I'm wishing I had room for two of them - I could silence 60 and 90 meters background with them. Maybe I'll take down the DX-Ultra and put up another one of these. I'd hate to lose the DX-U (it's great on everything 41 meters and up), but two matched antennae on the MFJ-1026 would work wonders, I think. Bruce * * Excellent. This is good to hear. Congratulations.- Hide quoted text - - Show quoted text - Without counting all my chickens before they hatch, I will say I am very pleased - and grateful to you, Peter, and the other folks including Roy, Dave, Kevin, MII and others who have chimed in with their help and advice. *Thanks! * *Always glad to help in what marginal way I may, Bruce. * *If you've had THAT kind of noise reduction, you're going to enjoy a whole new world of listening. * *I know you've mentioned it before, but I've had lunch since then...which receiver are you feeding with this?- Hide quoted text - - Show quoted text - LOL! *Three of them - Icom R75, Allied SX-190 and a DX-160. -fwiw- The "Allied AX/SX-190 Receiver" a 'Resource Collection' Compliments of Mark Rehorst http://deane.bio.ucalgary.ca/Allied-...Info-Oct02.pdf |
#37
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60 Foot Random Wire Shortwave [SWL] Antenna ?
On 2/8/11 21:44 , bpnjensen wrote:
On Feb 8, 7:28 pm, wrote: On Feb 8, 5:49 pm, wrote: On Feb 8, 2:42 pm, "D. Peter wrote: On 2/8/11 16:39 , bpnjensen wrote: On Feb 8, 2:27 pm, D Peter wrote: On 2/8/11 16:03 , bpnjensen wrote: On Feb 8, 12:22 pm, D Peter wrote: On 2/8/11 11:06 , bpnjensen wrote: On Feb 5, 3:35 pm, "D. Peter wrote: You do have a quite a bit of antenna, there. Verify that you've not got too much. Look for images, indicating overload. A pad may be required. FWIW, I have found that this new antenna, even before the unun is grounded, works *extremely* well on almost all bands for elimination of electrical hash noise with my DX-Ultra and MFJ-1026. I can lop off 4-8 S-Units of hash noise while scarcely touching the desired signal, leaving otherwise obscured signals either in the clear or almost so. It has brought otherwise undetectable signals to easy copy. Right now, I'm wishing I had room for two of them - I could silence 60 and 90 meters background with them. Maybe I'll take down the DX-Ultra and put up another one of these. I'd hate to lose the DX-U (it's great on everything 41 meters and up), but two matched antennae on the MFJ-1026 would work wonders, I think. Bruce Excellent. This is good to hear. Congratulations.- Hide quoted text - - Show quoted text - Without counting all my chickens before they hatch, I will say I am very pleased - and grateful to you, Peter, and the other folks including Roy, Dave, Kevin, MII and others who have chimed in with their help and advice. Thanks! Always glad to help in what marginal way I may, Bruce. If you've had THAT kind of noise reduction, you're going to enjoy a whole new world of listening. I know you've mentioned it before, but I've had lunch since then...which receiver are you feeding with this?- Hide quoted text - - Show quoted text - LOL! Three of them - Icom R75, Allied SX-190 and a DX-160. Oh, that's right...you discussed that SX-190 at some length. Duh... And I remember being envious because of it. So, how does it handle now that you've got a reasonably quiet antenna on the front end? And how does it compare to R75?- Hide quoted text - - Show quoted text - The R75 is considerably more sensitive and/or with a better s/n ratio, given the same antenna system. Things are fairly audible on the R75 that are in the hash on the SX-190. Still, the SX-190 is a bunch of fun. For a bad hum, I need to get either a capacitor replacement on the power supply, or figure out the wiring on the 12VDC plug (an oddly configured 4-prong socket) and see if that does the trick. Also might be some bad caps in the audio chain.- Hide quoted text - - Show quoted text - Is it a regular AC 60 Hz hum ? It sure sounds like it - present at all audio volume levels - but when the volume is turned up to maximum, at about 3/4 volume the hum gets louder - that's why I think it may be a combination. Sufficient power supply ripple alone would keep the RF stages from working, and the AF stages from amplifying an intelligible signal. It would also be relatively constant in amplitude. But a moderate amount of power supply ripple would produce an audible hum regardless of volume setting, and because the ripple is impressed on the preamp stages and at various locations throughout the receiver there would be a variation in audible hum with volume control. Start by replacing the power supply capacitors. And then replace all the bypass and decoupling caps. And then the interstage caps. Eventually, all the electrolytics will go. You'll be amazed at the difference. |
#38
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WHY ? Does The SWL "Sloper" Antenna Have A 'Down-Wire' ?
On Feb 10, 5:25*am, dave wrote:
- - On 02/09/2011 07:58 PM, RHF wrote: - - . - - Somewhere I remember reading that a SWL'er* had - - taken a longer piece of Insulated Stranded Copper - - Wire and repaced the shorter Down-Wire of his - - "Sloper" Antenna. *Routed/Run this Insulated Wire - - down the Side of the House and out along the ground - - under the 'Lay' of the Sloping Antenna Wire Element. - - * Claim that his produced the best Signals and least - - noise and was better than grounding the Down-Wire - - at the Side of the House. {I have not tried that yet} - - . - SWLers claim a lot of bogus things. Dave, IMHO : More Often Then Not The SWL'ers State The Simple Honest Factual Truth As They Hear* It ) * Their Own Personal Subjective Experience {What Appears To Work For Them} -versus- Objective Measured Evidence and Advertising Hype What I have found out over the years Dave is what Works for one Shortwave Radio Listener [SWL] in one location does not necessarily translate and work for the guy : down-the-street over-the-hill; down-on-the-3rd-floor; etc etc etc... The Is NO Single Right Way {One Size Does NOT Fit All} Generally I take people at their Word and their Claimed Results : Look just this last few weeks BpnJ built his own new home brewed SWL Antenna and says it produces a better Signal and Lower Noise than his Commercial DX-Ultra http://www.universal-radio.com/catalog/sw_ant/3377.html Professionally Engineering and Factory Made SWL Antenna. http://groups.google.com/group/rec.r...efdc4caaa8ceff Simply Happy That BpnJ is Getting Better Results |
#39
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WHY ? Does The SWL "Sloper" Antenna Have A 'Down-Wire' ?
On Feb 9, 7:58*pm, RHF wrote:
On Feb 6, 3:15*pm, dave wrote: On 02/06/2011 03:04 PM, RHF wrote: On Feb 6, 9:10 am, *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? BpnJ : ? Alignment = Lay-Out = By-Design ! Many Types and Configurations of "Sloper" Antennas http://groups.google.com/group/rec.r...7a96ab218b8103 NOTE : The "Sloper" Antenna normally needs a better more consistent Earthen Ground under it than an Elevated Horizontal "Flat" Wire Antenna. * The "Sloper" Antenna is more of a 'Ground Reflective' Aerial * * The Elevated Horizontal "Flat" Wire Antenna is more of a 'Free Space' Aerial. {Higher Up and Away from the Earth 'Ground'} * . The sloper's a vertical and needs a bottom half. Grounds work better 6 feet in the air than 6 inches below the earth. - - All antennas are dipoles. Dave you did not address the Question : WHY ? Does The SWL "Sloper" Antenna Have A 'Down-Wire' ? Dave : ? Care to Comment ? |
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