Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dl01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 775C6380000F7; Tue, 9 Aug 2011 12:36:03 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QqpGl-0006dS-Bt for rs_out_1@blacksheep.org; Tue, 09 Aug 2011 17:35:07 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QqpGk-0006dJ-J5 for rsgb_lf_group@blacksheep.org; Tue, 09 Aug 2011 17:35:06 +0100 Received: from smtp5.freeserve.com ([193.252.22.159]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QqpGi-0002mO-FE for rsgb_lf_group@blacksheep.org; Tue, 09 Aug 2011 17:35:06 +0100 Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3412.me.freeserve.com (SMTP Server) with ESMTP id EDE171C0008A for ; Tue, 9 Aug 2011 18:34:57 +0200 (CEST) Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3412.me.freeserve.com (SMTP Server) with ESMTP id E04221C000BC for ; Tue, 9 Aug 2011 18:34:57 +0200 (CEST) Received: from AGB (unknown [2.26.29.178]) by mwinf3412.me.freeserve.com (SMTP Server) with SMTP id 942DB1C0008A for ; Tue, 9 Aug 2011 18:34:57 +0200 (CEST) X-ME-UUID: 20110809163457607.942DB1C0008A@mwinf3412.me.freeserve.com Message-ID: From: "Graham" To: References: <001901cc55f1$52b9f660$0401a8c0@xphd97xgq27nyf><003701cc55f8$e9e01950$0401a8c0@xphd97xgq27nyf> <006801cc5601$705d4ae0$0401a8c0@xphd97xgq27nyf> <2CCA2BE4259248B4ABDC241F0EE58FA8@AGB> <003201cc56ad$091bce90$0401a8c0@xphd97xgq27nyf> In-Reply-To: <003201cc56ad$091bce90$0401a8c0@xphd97xgq27nyf> Date: Tue, 9 Aug 2011 17:34:55 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 X-Antivirus: avast! (VPS 110809-0, 09/08/2011), Outbound message X-Antivirus-Status: Clean X-Spam-Score: 0.2 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,RCVD_ILLEGAL_IP=0.234 Subject: Re: LF: 137 ck Content-Type: multipart/alternative; boundary="----=_NextPart_000_0169_01CC56BA.A7576490" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_40_50,HTML_MESSAGE, MISSING_OUTLOOK_NAME autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:497927680:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d4acf4e4161f24309 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_0169_01CC56BA.A7576490 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Power corrupts ..! Yes that is probably quantising problems with the a/d = conversations , its quite a big step response=20 Still worth having a look with the audio-spec analyser for supply = components , with cheap (s/h) usb sound cards , its a cheap but = useful test instrument=20 Not sure how a L/C network would handle fast keying ? was the tx a = cw beacon or modulated beacon ? I use =20 a hex-fet series stabilised for my 12v 20 amp supply and one of = 2 500 watt 24v and 1.5 Kw 50 v switch mode supplies =20 Good luck ..=20 73 -G.. From: mal hamilton=20 Sent: Tuesday, August 09, 2011 4:57 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: 137 ck Graham The display looks clean this end also the audio sounds pure with no 100 = hz hum as monitored on an independent RX I have the proper C's es L for decouping as per Decca instructions with = this TX.=20 With a strong signal on some Grabbers there will be the dog bone effect = with leading/trailing edge blips from keying carrier on/off but on scope no transients visible. 73 de mal/g3kev ----- Original Message -----=20 From: Graham=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Monday, August 08, 2011 11:49 PM Subject: Re: LF: 137 ck That's the problem with modern digital technology , the dynamic = range exceeds , that of the MK-1 eye ball , 30 db is 1000:1 , = will show at 20 db over the noise and would not show on the scope Use a reasonable decoupling capacitor , and look at the psu = voltage using a (cheap) sound card (with high z resistive ladder = for safety) ..use Wolf's SPEC-LAB to view the dB attenuation = at 50, 100, 150 , 200 Hz etc=20 Depending on the loop bandwidth of the stabiliser , keying may = also induce transits , use the peak hold to observe the generated = spectrum=20 G.. From: mal hamilton=20 Sent: Monday, August 08, 2011 8:29 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: 137 ck No hum Gary I am monitoring on the scope and sig is vy clean mal/g3kev ----- Original Message -----=20 From: Gary - G4WGT=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Monday, August 08, 2011 8:19 PM Subject: Re: LF: 137 ck OK Mal,=20 Captures are at 10 minute intervals, but I have saved you going to = SpecSavers as I have enlarged the frequency readout. BTW...do you have some 100Hz hum on your transmission, look at my = grabber to check. 73 Gary - G4WGT. On 8 August 2011 19:28, mal hamilton wrote: Yes Gary Your grabber seems to have a long delay before display es the = times and freq hard to read otherwise sensitivity seems ok at present for distance 73 de mal/g3kev ----- Original Message -----=20 From: Gary - G4WGT=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Monday, August 08, 2011 7:21 PM Subject: Re: LF: 137 ck Mal,=20 You wrote.........While testing earlier find NO UK GRABBERS = working My 500kHz & 137kHz grabber runs 24/7.... http://myweb.tiscali.co.uk/wgtaylor/grabber2.html Gary - G4WGT. On 8 August 2011 18:33, mal hamilton = wrote: Just finished my new PSU 60V/10A psu. While testing earlier = find NO UK GRABBERS working and DK7FC has a SPURIOUS wobble signal right = on 137.7=20 I will be QRV for a while from now on 137.7 qrs3 for DX qso's = and will work locals on CW 73 De Mal/G3KEV ------=_NextPart_000_0169_01CC56BA.A7576490 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Power  = corrupts  ..!
 
Yes that  is  = probably =20 quantising   problems with the  a/d   = conversations=20   , its quite a  big  step  response
 
Still worth  having a look  = with=20 the  audio-spec analyser for supply  components  ,=20 with  cheap (s/h) usb  sound cards , its a  cheap = but =20 useful  test  instrument
 
Not sure  how a L/C  = network  would=20 handle  fast  keying ? was the  tx a  cw =  beacon=20 or  modulated  beacon ?  I use  
a  hex-fet series stabilised = for =20 my 12v   20  amp  supply  and one = of  =20 2  500 watt  24v and  1.5 Kw  50 v =  switch =20 mode  supplies  
 
Good  luck ..
 
73 -G..
 
 
 
 

From: mal hamilton
Sent: Tuesday, August 09, 2011 4:57 PM
To: rsgb_lf_group@blacksheep.org= =20
Subject: Re: LF: 137 ck

Graham
The display looks clean this end also the audio = sounds=20 pure with no 100 hz hum as monitored on an independent RX
I have the proper C's es L for decouping as per = Decca=20 instructions with this TX.
With a strong signal on some Grabbers there = will be=20 the dog bone effect with leading/trailing edge blips from keying carrier = on/off
but on scope no transients = visible.
73 de mal/g3kev
 
----- Original Message -----
From:=20 Graham
Sent: Monday, August 08, 2011 = 11:49=20 PM
Subject: Re: LF: 137 ck

That's  the problem  = with =20 modern   digital  technology , the  dynamic = range =20 exceeds , that  of the  MK-1   eye  ball , 30 = db=20 is  1000:1  , will  show at  20 db over the  = noise=20 and  would  not  show on the  scope
 
Use a  reasonable  =20 decoupling   capacitor  , and look at the  = psu  =20 voltage  using  a  (cheap) sound  card =20 (with high z resistive ladder for  safety) ..use =20 Wolf's   SPEC-LAB   to   view  the = dB =20 attenuation  at  50, 100, 150 , 200  Hz  etc =
 
Depending  on the  = loop =20 bandwidth  of the  stabiliser , keying  may  = also =20 induce  transits  , use the  peak  hold to  = observe=20 the  generated  spectrum
 
G..

From: mal hamilton
Sent: Monday, August 08, 2011 8:29 PM
To: rsgb_lf_group@blacksheep.org= =20
Subject: Re: LF: 137 ck

No hum Gary
I am monitoring on the scope and sig is vy=20 clean
mal/g3kev
 
----- Original Message -----
From:=20 Gary -=20 G4WGT
To: rsgb_lf_group@blacksheep.org= =20
Sent: Monday, August 08, 2011 = 8:19=20 PM
Subject: Re: LF: 137 ck

OK Mal,=20

Captures are at 10 minute intervals, but I have saved you going = to=20 SpecSavers as I have enlarged the frequency readout.

BTW...do you have some 100Hz hum on your transmission, look at = my=20 grabber to check.

73

Gary - G4WGT.


On 8 August 2011 19:28, mal hamilton <g3kevmal@talktalk.net>=20 wrote:
Yes Gary
Your grabber seems to have a long delay = before=20 display es the times and freq hard to read
otherwise sensitivity seems ok at present = for=20 distance
73 de mal/g3kev
 
----- Original Message ----- =
From: Gary - G4WGT
To: rsgb_lf_group@blacksheep.org
Sent: Monday, August 08, = 2011 7:21=20 PM
Subject: Re: LF: 137 = ck

Mal,=20

You wrote.........While = testing=20 earlier find NO UK GRABBERS working

My 500kHz & 137kHz grabber runs=20 24/7....

http://myweb.tiscali.co.uk/wgtaylor/grabber2.html

Gary - G4WGT.


On 8 August 2011 18:33, mal hamilton = <g3kevmal@talktalk.net> wrote:
Just finished my new PSU 60V/10A psu. = While=20 testing earlier find NO UK GRABBERS working and DK7FC has a = SPURIOUS=20 wobble signal right on 137.7
I will be QRV for a while from now on = 137.7 qrs3=20 for DX qso's and will work locals on CW
73 De Mal/G3KEV
=
 




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