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Puyallup, WA Ultralight TP's for 9-4
Hello All,
The Asians seem to be a little slow in getting out of the gate this season, and their performance this morning followed the same lackluster pattern. With the exception of 972-HLCA and a
Hello All,
The Asians seem to be a little slow in getting out of the gate this season, and their performance this morning followed the same lackluster pattern. With the exception of 972-HLCA and a
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By
Gary DeBock
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#23687
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Re: Receiver sensitivity parameter
Thank you, Bill... very comfortably confusing. Actually, pretty nicely explained.
Joe Rotello / Knoxville, TN / USA
Thank you, Bill... very comfortably confusing. Actually, pretty nicely explained.
Joe Rotello / Knoxville, TN / USA
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By
josephrot
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#23686
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Re: Receiver sensitivity parameter
Confusion may also arise from the use of u for µ
when the latter is not readily available on the keyboard.
Michael
Confusion may also arise from the use of u for µ
when the latter is not readily available on the keyboard.
Michael
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By
Michael <michael.setaazul@...>
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#23685
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Re: Receiver sensitivity parameter
Hi Bruce,
Sorry to confuse.
I used dBu-dBµV/m to try to show that they are the same thing.
Should have stated dBu (equivalent to dBµV/m).
Corrected paragraph:
The modern DSP receivers like the
Hi Bruce,
Sorry to confuse.
I used dBu-dBµV/m to try to show that they are the same thing.
Should have stated dBu (equivalent to dBµV/m).
Corrected paragraph:
The modern DSP receivers like the
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By
mediumwavedx
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#23684
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Re: Receiver sensitivity parameter
Whatis.com says it better then me! "The standard unit of electric field (E-field) strength is the volt per meter (V/m). An E field of 1 V/m is represented by a potential difference of 1 V existing
Whatis.com says it better then me! "The standard unit of electric field (E-field) strength is the volt per meter (V/m). An E field of 1 V/m is represented by a potential difference of 1 V existing
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By
Richard Jones
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#23683
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IRCA Convention Update
2014 IRCA 50th Anniversary Convention – Billings, Montana
The 2014 IRCA 50th Anniversary Convention will be held in Billings, Montana on September 19th and 20th. John and Nancy Johnson of Mesa,
2014 IRCA 50th Anniversary Convention – Billings, Montana
The 2014 IRCA 50th Anniversary Convention will be held in Billings, Montana on September 19th and 20th. John and Nancy Johnson of Mesa,
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By
Phil Bytheway <phil_tekno@...>
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#23682
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Re: Receiver sensitivity parameter
Now I'm confused. Nice description of dBu and dBµV/m, but you lost me by introducing dBu-dBµV/m without explanation. What is dBu-dBµV/m?
--
Bruce Conti
B.A.Conti Photography
Now I'm confused. Nice description of dBu and dBµV/m, but you lost me by introducing dBu-dBµV/m without explanation. What is dBu-dBµV/m?
--
Bruce Conti
B.A.Conti Photography
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By
Bruce Conti
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#23681
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Re: Receiver sensitivity parameter
This can be a confusing subject, so please allow me to offer this explanation.
The common unit used in measuring received field strength is volts per meter, or usually, millivolts/meter 'mV/m'
This can be a confusing subject, so please allow me to offer this explanation.
The common unit used in measuring received field strength is volts per meter, or usually, millivolts/meter 'mV/m'
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By
mediumwavedx
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#23680
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Puyallup, WA Ultralight TP's for 9-3
Hello All,
Another fairly mediocre band presented itself this morning, although in an improvement over yesterday a much greater variety of Asians managed some form of weak audio. Vibrant audio was
Hello All,
Another fairly mediocre band presented itself this morning, although in an improvement over yesterday a much greater variety of Asians managed some form of weak audio. Vibrant audio was
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By
Gary DeBock
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#23679
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Re: Receiver sensitivity parameter
In trying to "simplify" an answer, engineers may get more "complicated"...
Signal strength is typically expressed in voltage per length or signal power received by a reference antenna. High-powered
In trying to "simplify" an answer, engineers may get more "complicated"...
Signal strength is typically expressed in voltage per length or signal power received by a reference antenna. High-powered
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By
josephrot
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#23678
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Opportunity to log a new station - WVLZ AM 1180
Ultralight dx'ers,
Last few evenngs I've head oldies under WHAM 1180 - got a ID tonight - WVLZ AM 1180 Knoxville, TN. Info on the internet is they changed format from sports to oldies on Aug 29th
Ultralight dx'ers,
Last few evenngs I've head oldies under WHAM 1180 - got a ID tonight - WVLZ AM 1180 Knoxville, TN. Info on the internet is they changed format from sports to oldies on Aug 29th
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By
gmosherat
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#23677
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Receiver sensitivity parameter
A receiver's LW and MW sensitivity is often specified in mV/M. What does this actually mean? I have tried to find out on the web but have yet to find an answer that I can understand.
I presume it
A receiver's LW and MW sensitivity is often specified in mV/M. What does this actually mean? I have tried to find out on the web but have yet to find an answer that I can understand.
I presume it
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By
Phillips
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#23676
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Puyallup, WA Ultralight TP's for 9-2
Hello All,
Asian results here were somewhat similar to those reported by Dennis as the TP's struggled back from the recent unsettled solar conditions. Yesterday's star 738-Tahiti was long gone, but
Hello All,
Asian results here were somewhat similar to those reported by Dennis as the TP's struggled back from the recent unsettled solar conditions. Yesterday's star 738-Tahiti was long gone, but
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By
Gary DeBock
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#23675
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Re: Predicting MW Intermod/Bleedthrough
Yep, I dream of a proper FSL....
But almost any front-end selection will help significantly.
A well-built tunable loop inductively coupled to even a lowly
radio will work wonders by dint of its
Yep, I dream of a proper FSL....
But almost any front-end selection will help significantly.
A well-built tunable loop inductively coupled to even a lowly
radio will work wonders by dint of its
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By
Michael <michael.setaazul@...>
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#23674
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Re: Predicting MW Intermod/Bleedthrough
If the problem is a wide-as-a-barndoor receiver front end, then maybe you should invest in one of those monster DeBock FSL antennas. This type of tuned antenna will knock down much of the
If the problem is a wide-as-a-barndoor receiver front end, then maybe you should invest in one of those monster DeBock FSL antennas. This type of tuned antenna will knock down much of the
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By
Bruce Conti
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#23673
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Re: Predicting MW Intermod/Bleedthrough
By
Michael <michael.setaazul@...>
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#23672
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Re: Predicting MW Intermod/Bleedthrough
I find that the weak point of the newer DSP radios seems to be desense more than anything else. I think it comes from an inadequate front end. It does little to have a 1 KHz filter further downline in
I find that the weak point of the newer DSP radios seems to be desense more than anything else. I think it comes from an inadequate front end. It does little to have a 1 KHz filter further downline in
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By
mediumwavedx
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#23671
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Re: Predicting MW Intermod/Bleedthrough
Likely an external mixing product. 1050 - 1010 = 40. 1050 + 40 = 1090. A 'standard' "sum-and/or-difference" spur.
Those are generated by something metallic out in or near the transmitter swamp picking
Likely an external mixing product. 1050 - 1010 = 40. 1050 + 40 = 1090. A 'standard' "sum-and/or-difference" spur.
Those are generated by something metallic out in or near the transmitter swamp picking
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By
Russ Edmunds <wb2bjh@...>
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#23670
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Re: Predicting MW Intermod/Bleedthrough
From a response given to me elsewhere, and one that makes sense, the front-end design might be the critical variable. Radios that use a broad and front-end without frequency tracking are more likely
From a response given to me elsewhere, and one that makes sense, the front-end design might be the critical variable. Radios that use a broad and front-end without frequency tracking are more likely
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By
m_a_schuster
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#23669
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Re: Predicting MW Intermod/Bleedthrough
Agreed - the DSP largely works against adjacent channel interference, improving selectivity.
The other part of the equation has to do with the overall quality ( or lack thereof ) in the Chinese-made
Agreed - the DSP largely works against adjacent channel interference, improving selectivity.
The other part of the equation has to do with the overall quality ( or lack thereof ) in the Chinese-made
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By
Russ Edmunds <wb2bjh@...>
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#23668
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