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#1
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Reg Edwards wrote:
Sal, enjoy yourself with it. I do not wish to dampen your enthusiam, but 2 dB is only 1/3 of an S-unit. Hardly noticeable! ;o) ;o) Hardly noticeable? That's enough to be crowned champion of a 75m mobile shootout with all the attending honors. :-) -- 73, Cecil http://www.qsl.net/w5dxp |
#2
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1dB is a human-detectable change.
2dB could make the difference between a QSO and no QSO with marginal S/N ratio. 1 "standard" S-unit of 6dB can probably make the difference between marginal S/N and armchair copy. If copy is already armchair, Reg's totally right. No change. I like to make a lot of QSO's that are down in the noise, though. 73, Dan |
#3
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#4
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Hmm... maybe "like" is the wrong word...
Whaddya mean, QRP?? I'm running 100W into my 40m dipole on 20m with 100 feet of RG-58! Only 13dB of loss there! That's only 2 and change in S units. I mean, 100W/10^(1.3) = 5.01W... uhoh. Seriously though, a lot of my 6m DX QSO's on CW are within a couple dB of being unreadable, I bet. Probably none on HF right now that could be split this finely, because all my tough ones are being covered by static crashes on 40 and 30m. Back when 15-10m were open, though, I would have welcomed a "1/3 S-unit" increase on some of the hard stuff. Of course, fading is much more than 2dB, but having the average signal level that much higher will still make an *improvement* in readability. 73, Dan |
#5
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Cec,
With a generous standard error of 1dB in the measurements, and taking the 3-sigma limits, anybody who has claimed a crown on the strength of 1/3 of an S-unit should be obliged to hand it back to the judges pending the other participants clamour for a re-count. ;o) ---- Reg. |
#6
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Reg Edwards wrote:
With a generous standard error of 1dB in the measurements, and taking the 3-sigma limits, anybody who has claimed a crown on the strength of 1/3 of an S-unit should be obliged to hand it back to the judges pending the other participants clamour for a re-count. ;o) I have a confession to make, Reg. I noticed precipitation water from the fog dripping from everyone's coils when the measurements first started. I waited until last when the sun was shining and won the shootout. :-) -- 73, Cecil http://www.qsl.net/w5dxp |
#7
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![]() "Cecil Moore" wrote I have a confession to make, Reg. I noticed precipitation water from the fog dripping from everyone's coils when the measurements first started. I waited until last when the sun was shining and won the shootout. :-) -- ======================================== Cec, now that's really making science work for you. I can imagine you in a deer-stalker capacitance hat, using a Sherlock Holmes magnifying glass to read the S-meter. ---- Reg. |
#8
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ORIGINAL MESSAGE:
On Sun, 30 Jul 2006 18:09:58 GMT, Cecil Moore wrote: Hardly noticeable? That's enough to be crowned champion of a 75m mobile shootout with all the attending honors. :-) -- ------------ REPLY SEPARATOR ------------ Speaking of shootouts, are there any scheduled this summer? I've never been to one and I'd love to go. Bill, W6WRT |
#9
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Bill Turner wrote:
Speaking of shootouts, are there any scheduled this summer? I've never been to one and I'd love to go. I haven't heard of any. -- 73, Cecil http://www.qsl.net/w5dxp |
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