Topband: Impressive demonstration of one dB of signal strength improvement

[Martin Kratoska]

What QST? Would be a copy available?

73,
Martin, OK1RR

Dne 21. 08. 19 v 18:24 K9FD napsal(a):
> An excellent article is in an old QST called "station design for DX"
> It mentions that 1 DB improvement in the station will provide a whole
> new layer of DX signals.   Very true.
> 
> In the average station you can easily find several DB that can be gained.
> If your into DX think of all your missing.
> 
> I always have to laugh when the statement is made "I can work all I can 
> hear"
> 
> that says it all,  its what your not hearing is the problem.
> 
> 73 Merv K9FD
> 
>> These recordings are an impressive demonstration of the benefit of
>> one dB of signal strength improvement in a weak signal situation.
>>
>>
>> Click on the links on this website:
>>
>>
>>
>> www.ab7e.com/weak_signal/mdd.html
>>
>>
>> 73
>> Frank
>> W3LPL
>>
>>
>> ----- Original Message -----
>>
>> From: "David Gilbert" <xdavid at cis-broadband.com>
>> To: elecraft at mailman.qth.net
>> Sent: Wednesday, August 21, 2019 7:02:21 AM
>> Subject: Re: [Elecraft] KPA500 Coax size requirements
>>
>>
>> That's not a universally true statement.
>>
>> Several years ago I was trying to decide which antenna to buy, and my
>> choice came down to two antennas that were 2 db apart. I created some
>> audio files by recording typical band noise and then overlaying them
>> with recorded CW messages at various strengths. The difference between
>> 1 dB above the noise level and 2 dB above the noise level can make the
>> difference between no copy and copy. The files and testing methodology
>> can be found here:
>>
>> http://www.ab7e.com/weak_signal/mdd.html
>>
>> If you're ragchewing it doesn't matter, but if you're trying to make a
>> contact and your signal is at the level of the mud it does.
>>
>> 73,
>> Dave AB7E
>>
>> On 8/20/2019 9:18 PM, Jim Danehy wrote:
>>> ONE DB loss is the LEAST DETECTABLE amount a human can detect. Hardly 
>>> if not impossible to notice.
>>>
>>> Jim
>>> W9VNE/VA3VNE
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