On 31 Mar 2014, at 06:47, Al Lorona alor...@sbcglobal.net wrote:
For years I have heard folks state that 1.8 kHz is mandatory for SSB
contesting... but I have never understood how one could put up with this
narrow bandwidth for long. I need more information hitting my ears and am
Mail 7.2 \(1874\))
Subject: Re: [Elecraft] K3 in WPX SSB with 2.7 roofer
From: Clive Lorton cl...@thelortons.co.uk
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Date: Mon, 31 Mar 2014 13:27:53 +0100
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...@mailman.qth.net [mailto:elecraft-
boun...@mailman.qth.net] On Behalf Of Clive Lorton
Sent: 31 March 2014 10:58
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 in WPX SSB with 2.7 roofer
On 31 Mar 2014, at 06:47, Al Lorona alor...@sbcglobal.net wrote:
For years I have heard folks state
: elecraft-boun...@mailman.qth.net [mailto:elecraft-
boun...@mailman.qth.net] On Behalf Of Clive Lorton
Sent: 31 March 2014 10:58
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 in WPX SSB with 2.7 roofer
On 31 Mar 2014, at 06:47, Al Lorona alor...@sbcglobal.net wrote:
For years I have
One of the things that Bell Labs found in adding loading coils to phone
lines (to reduce the high frequencies) was that in an audio system if you
reduce the high frequencies then you needed to also reduce the low
frequencies to keep the intelligibility constant. Since a phone system
needed
actually loading coils were to reduce overall loss
by helping to cancel the line capacity
before amplifiers 1000 cycles was the frequency passed with
best loss Characteristics the phones were designed to emphasise that
frequency
whats that you say
making phone calls werent for sissies
Bob
Just a thought,
On SSB, you guys should try using LO HI cut instead of shift and width. You
won't look back and it will probally sound better.
You can probably leave lo cut pretty much alone and vary hi cut. Roofing
filters will come in automatically.
Try it.
73
Mike R
RIP- Mr 500.
I have found that if I shift the passband I can still understand SSB
even though the DSP filter says it is only 1.1 khz wide. Try it and the
signal will be very clear once you hit the sweet spot. I think this is
because the intelligence carrying portion of the voice is not
necessarily in the
I was in the WPX SSB contest this weekend, and wanted to try
using just the 2.7 roofing filter, using only DSP to narrow the
response below that. I previously have had the feeling that the
1.8 roofer was degrading speech intelligibility. The WPX is a
QRM-fest of the first order. Everybody
That's been my experience too, Dave. SSB is not my forte ... severely
compromised hearing ... but I do get into a small handful of phone
contests [not WPX SSB, for the reasons you mentioned]. I had a borrowed
1.8 filter for awhile, and found that it really did degrade the audio.
Conversely,
but excellent selectivity.
73 Johnny VR2XMC
寄件人︰ Dave Hachadorian k6ll.d...@gmail.com
收件人︰ Reflector Elecraft elecraft@mailman.qth.net
傳送日期︰ 2014年03月31日 (週一) 4:30 AM
主題︰ [Elecraft] K3 in WPX SSB with 2.7 roofer
I was in the WPX SSB contest this weekend, and wanted
︰ Dave Hachadorian k6ll.d...@gmail.com
收件人︰ Reflector Elecraft elecraft@mailman.qth.net
傳送日期︰ 2014年03月31日 (週一) 4:30 AM
主題︰ [Elecraft] K3 in WPX SSB with 2.7 roofer
I was in the WPX SSB contest this weekend, and wanted to try
using just the 2.7 roofing filter, using only DSP to narrow
I have the 2.0 and 2.8 filters installed; I seldom
get below 2.2-2.4 though but I'm not a contester.
Was watching 20 SSB on my P3 a while ago. You
could sure tell something changed at around
midnight Zulu!
73, Phil w7ox
On 3/30/14, 1:30 PM, Dave Hachadorian wrote:
I was in the WPX SSB
On Mar 30, 2014, at 4:30 PM, Dave Hachadorian k6ll.d...@gmail.com wrote:
Using only the 2.7 filter, I never experienced a case of adjacent-signal AGC
pumping, or any other negative issue during the contest. I think if an SSB
signal is so close to you that it is pumping your agc through the
Dave, I have had pretty much the same experience. I think I would have placed
the 2.1 kHz passband that you settled on a bit higher, say, LO=0.30 and
HI=2.40, or even LO=0.40 and HI=2.50, which is probably better matched to the
majority of contesters' transmitted signals out there. But I
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