Re: [Elecraft] K3 in WPX SSB with 2.7 roofer

2014-03-31 Thread Clive Lorton
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

Re: [Elecraft] K3 in WPX SSB with 2.7 roofer

2014-03-31 Thread Clive Lorton
Mail 7.2 \(1874\)) Subject: Re: [Elecraft] K3 in WPX SSB with 2.7 roofer From: Clive Lorton cl...@thelortons.co.uk In-Reply-To: e1wuz4h-0002ah...@gator4128.hostgator.com Date: Mon, 31 Mar 2014 13:27:53 +0100 Content-Transfer-Encoding: quoted-printable Message-Id: 160e5322-fc71-4f97-a5b4

Re: [Elecraft] K3 in WPX SSB with 2.7 roofer

2014-03-31 Thread Ian White
...@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] K3 in WPX SSB with 2.7 roofer

2014-03-31 Thread Johnny Siu
: 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

Re: [Elecraft] K3 in WPX SSB with 2.7 roofer

2014-03-31 Thread George Danner
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

Re: [Elecraft] K3 in WPX SSB with 2.7 roofer

2014-03-31 Thread riese-k3djc
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

Re: [Elecraft] K3 in WPX SSB with 2.7 roofer

2014-03-31 Thread mikerodgerske5gbc
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.

Re: [Elecraft] K3 in WPX SSB with 2.7 roofer

2014-03-31 Thread Buck - k4ia
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

[Elecraft] K3 in WPX SSB with 2.7 roofer

2014-03-30 Thread Dave Hachadorian
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

Re: [Elecraft] K3 in WPX SSB with 2.7 roofer

2014-03-30 Thread Fred Jensen
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,

[Elecraft] K3 in WPX SSB with 2.7 roofer

2014-03-30 Thread Johnny Siu
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

Re: [Elecraft] K3 in WPX SSB with 2.7 roofer

2014-03-30 Thread Dave Hachadorian
︰ 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

Re: [Elecraft] K3 in WPX SSB with 2.7 roofer

2014-03-30 Thread Phil Wheeler
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

Re: [Elecraft] K3 in WPX SSB with 2.7 roofer

2014-03-30 Thread Bill Coleman
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

Re: [Elecraft] K3 in WPX SSB with 2.7 roofer

2014-03-30 Thread Al Lorona
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