Delivered-To: daveyxm@virginmedia.com Received: by 10.67.23.138 with SMTP id ia10csp403908pad; Wed, 25 Sep 2013 10:44:43 -0700 (PDT) X-Received: by 10.194.23.8 with SMTP id i8mr171104wjf.68.1380131082881; Wed, 25 Sep 2013 10:44:42 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25]) by mx.google.com with ESMTP id ev17si9766393wid.0.1969.12.31.16.00.00; Wed, 25 Sep 2013 10:44:42 -0700 (PDT) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1VOsa5-0003iG-4S for rs_out_1@blacksheep.org; Wed, 25 Sep 2013 18:08:53 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1VOsa3-0003i7-TX for rsgb_lf_group@blacksheep.org; Wed, 25 Sep 2013 18:08:51 +0100 Received: from blu0-omc1-s21.blu0.hotmail.com ([65.55.116.32]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1VOsZz-0004ax-IU for rsgb_lf_group@blacksheep.org; Wed, 25 Sep 2013 18:08:50 +0100 Received: from BLU180-W22 ([65.55.116.9]) by blu0-omc1-s21.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675); Wed, 25 Sep 2013 10:08:45 -0700 X-TMN: [TUTzLgtQZ2aYMFumbs7vYYswfi75Me9v] X-Originating-Email: [rjraide@hotmail.com] Message-ID: From: Bob Raide To: "rsgb_lf_group@blacksheep.org" Date: Wed, 25 Sep 2013 13:08:45 -0400 Importance: Normal In-Reply-To: <7899F5895DF041D487F0057532E92440@gnat> References: ,<524213E5.5000509@iup.uni-heidelberg.de> ,<8C15231456D14C7EA62378D07C17171D@gnat> ,<7899F5895DF041D487F0057532E92440@gnat> MIME-Version: 1.0 X-OriginalArrivalTime: 25 Sep 2013 17:08:45.0885 (UTC) FILETIME=[E4F5D6D0:01CEBA11] X-Spam-Score: -0.4 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Alan; You most certainly got me thinking. I am located on the side of a mile long drop to the East about a 1/4 mile down from the top on the east side of the hill. Over 1/2 mile remains to the bottom where it is in the village. I have one small tree near me but nothing really around the self supporting tower that is 90'. The two 150' legs are about 35' off ground at the ends. What I do have is my water well 20' from the tower. It is a large vein of water that flows from the top of the hill down to the bottom and probably into Keuka Lake. I never thought about connecting to the well casing as it is about 30' drop to the water. The water is hard as hell and am sure a good conductor. I am going to strap a chicken wire radial rite to it today and will be on tonite again for any signs on Gary's [G4WGT] 72.4 QRSS 500 grabber. One problem is that I use this open wire feed ant for 80 and 160 as well as a vertical on 500, 137, and now 72.4. I just fired up an hour ago and took an ant current measurement and optimized the tuning of the PA. I will be interested to see if anything changes upon well casing connection. It is interesting that only 4-5 miles NE of here is the NE Headquartered Loran C 700' tower and 1000KW defunct transmitter, etc. It is still there but Obama shut them all down to save a few bucks. It is at the Seneca Army Depot and between Seneca and Cayuga Lakes. The ground conductivity near all the finger lakes is the highest in the state. It may have been placed there for the 100 kHz operation purposely[???} Bob [...] Content analysis details: (-0.4 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [65.55.116.32 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (rjraide[at]hotmail.com) 1.6 SUBJ_ALL_CAPS Subject is all capitals -0.0 SPF_PASS SPF: sender matches SPF record -2.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: 50066481ef8267c25c4bcbad351efa5e Content-Type: multipart/alternative; boundary="_867f81df-96dc-4ed0-96a6-439a20a18058_" Subject: RE: LF: TA CW? 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=FORGED_HOTMAIL_RCVD, HTML_MESSAGE,SUBJ_ALL_CAPS,TO_ADDRESS_EQ_REAL 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 Status: O X-Status: X-Keywords: X-UID: 1681 --_867f81df-96dc-4ed0-96a6-439a20a18058_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Alan=3B You most certainly got me thinking. I am located on the side of a mile lon= g drop to the East about a 1/4 mile down from the top on the east side of t= he hill. Over 1/2 mile remains to the bottom where it is in the village. = I have one small tree near me but nothing really around the self supportin= g tower that is 90'. The two 150' legs are about 35' off ground at the end= s. What I do have is my water well 20' from the tower. It is a large vein= of water that flows from the top of the hill down to the bottom and probab= ly into Keuka Lake. I never thought about connecting to the well casing as= it is about 30' drop to the water. The water is hard as hell and am sure = a good conductor. I am going to strap a chicken wire radial rite to it tod= ay and will be on tonite again for any signs on Gary's [G4WGT] 72.4 QRSS 5= 00 grabber. =20 One problem is that I use this open wire feed ant for 80 and 160 as well as= a vertical on 500=2C 137=2C and now 72.4. I just fired up an hour ago and= took an ant current measurement and optimized the tuning of the PA. I wil= l be interested to see if anything changes upon well casing connection. It is interesting that only 4-5 miles NE of here is the NE Headquartered Lo= ran C 700' tower and 1000KW defunct transmitter=2C etc. It is still there = but Obama shut them all down to save a few bucks. It is at the Seneca Army= Depot and between Seneca and Cayuga Lakes. The ground conductivity near a= ll the finger lakes is the highest in the state. It may have been placed t= here for the 100 kHz operation purposely[???} Bob =20 From: alan.melia@btinternet.com To: rsgb_lf_group@blacksheep.org Date: Wed=2C 25 Sep 2013 11:22:27 +0100 Subject: Re: LF: TA CW? =0A= =0A= =0A= =0A= =0A= =0A= =0A= Hi Bob that sounds a good set-up. Excuse my =0A= "telling Grandma how to suck eggs" (as we call it) in my last=2C but I have= seen =0A= many frustrated LF ops after much work and investment in copper=2C gain lit= tle in =0A= ERP :-)) It is all a matter of your local conditions. =0A= =0A= Yes the 150' runs of your dipole will make =0A= substantial capacitive top load (~600pF) but I guess they droop=2C as in an= =0A= inverted "V"?? Paralleled wires help=2C provided they are spaced more than = about 3 =0A= feet apart=2C current direction is unimporant as they are not radiating. Th= ere are =0A= some interesting measurements on a small antenna at http://g3nyk.ham-radio-= op.net/spiraltop.htm. =0A= It was a little impractical because of the windage :-)) but an interesting = =0A= experiment=2C that was stimulated by an article in a Canadian Broadcast =0A= Engineering journal. (I hope all the links work....I have had some =0A= troubles with them)=0A= =0A= Laurie G3AQC found the the more top capacity he =0A= could add the lower his ground loss became and he finished with a meander t= hat =0A= gave around 1500pF I believe......at 6pF per metre you can see what that me= ans =0A= in length. By measurement we found that once the ground loss ceased to decr= ease =0A= by adding extra rods and wire.....doubling the top capacity would further h= alf =0A= the ground loss. The catch was the top-load =0A= needed to be over "clear ground" not foliage (he had a bank of Rhododendron= s in =0A= his garden=2C and had to avoid going over those=2C or any roofs) The commer= cial =0A= stations use umbrella loading (CFH Halifax NS) or enormous "fans" at NAA Cu= tler =0A= Ma. The classic GBR Rugby "figure of eight" was filled-in in later years to= =0A= increase the capacity of the 16kHz antenna. This effect does seem to lie = =0A= unappreciated by a lot of ops but many can't use it because of lossy trees = and =0A= buildings in the region of their antenna.=0A= =0A= Of course as you will be well aware at these power =0A= levels insulator loss=2C and corona starts to be a major concern. I think = =0A= Warren has set fire to several lengths of plastic water pipe used as insula= tors =0A= and spreaders :-)) =0A= =0A= Best wishes. I am sure that if you make the =0A= West to East crossing on 73kHz you will be the first to do it in that =0A= direction.=0A= =0A= Alan=0A= G3NYK =0A= =0A= ----- Original Message ----- =0A= From: =0A= Bob Raide =0A= =0A= To: rsgb_lf_group@blacksheep.org =0A= =0A= Sent: Wednesday=2C September 25=2C 2013 2:01 =0A= AM=0A= Subject: RE: LF: TA CW?=0A= =20 =0A= Alan=3B I appreciate your input on 73. It was my idea to =0A= have Warren Zeigler file an app just to see what might happen at our =0A= FCC. I had heard the staff at our FCC was instructed to welcome =0A= experimenters for the lower freqs. Warren filed it but told me =0A= nothing may come of it but they granted us the license! I am using a tube =0A= amp [3cx3000A7] with pi-net output and can make 2 kw easily. But only = =0A= have a 90' high tower and at the top is the center feed point of my 75 me= ter =0A= double extended zepp. I simply short the open wire line which runs =0A= almost vertically and fed it with allot of inductance in series! I =0A= assume the two 150' legs acts as top loading. Ground system is from my = =0A= broadcast experience where for field intensity surveys 36" wide chicken = =0A= wire was used with a 100' tower most often and a 250 =0A= transmitter. Eight 50' chicken wire radials produced =0A= decent field on the midband channels [1000 kHz or so] to measure =0A= from. Here I am using several 150' radials of chicken wire =0A= radials. I hope to stretch some out to 300' but that's going to be about= =0A= it at my location. I have made it out to Kansas just two days ago with = =0A= solid QRSS 60 sigs daytime. =20 I am running just about 1.5 KW into the =0A= ant. The voltage at the feedpoint draws over a 2" spark to a screw =0A= driver so am about at the power top end I think. Here in the finger lakes =0A= region of NY State the winter ground conductivity goes to 8 or better to = the =0A= NE with several finger lakes East of me. If I were on the coast I think = =0A= it would be a snap to hit the UK over the salt water. Going to be harder= =0A= for me inland here. Any comments would be appreciated-Bob =0A= =0A= =0A= From: alan.melia@btinternet.com To: rsgb_lf_group@blacksheep.org Date: =0A= Wed=2C 25 Sep 2013 01:16:12 +0100 Subject: Re: LF: TA CW? =0A= =0A= =0A= Hi Bob=2C the propagation conditions are very =0A= similar to the other LF bands ....there is skywave but the ground wave is= =0A= stronger further. The usual problem is antenna efficiency .....in rounded= =0A= figures 73 is 4 times more difficult than 136=2C which is 10 times more = =0A= difficult than 470/500. =0A= =0A= Beware of using HF or commercial "folklaw" on =0A= ground systems You MUST measure as you go otherwise you will waste a lot = of =0A= time and dollars to no great effect. I measured Ground Loss in experiment= s =0A= with Finbar early in the 137 era (using a simple =0A= transformer-ratio-arm-bridge)=2C and rolling out "radials" can be a big = =0A= mistake.....it all depends on your environment. the first one or maybe tw= o =0A= make a difference then it gets you wont notice the difference To be effec= tive =0A= radials on amateur sizes antennas need to be at least 1/8 =0A= wavelength which is over half a mile! Unlike 160m skin depth in the =0A= ground can be 30 feet or more at these frequencies. A lookat commercial V= LF =0A= antennas is more helpful. They use massive capacity top loading=2C but th= ey can =0A= usually choose their site for its suitability.=0A= =0A= The only station to make the crossing on 73 when =0A= we still had it on this side was Laurie G3AQC (now SK) He was using 1200W= from =0A= an ex Decca Nav TX and a reasonably efficient antenna...... but not that = =0A= good.His ERP was probably close to 1watt.=0A= =0A= Best of Luck ..... its a pity we will =0A= not get an allocation there again.=0A= Alan=0A= G3NYK (an original UK 73kHz "licence" =0A= holder)=0A= =0A= ----- =0A= Original Message ----- =0A= From: =0A= Bob Raide =0A= =0A= To: =0A= rsgb_lf_group@blacksheep.org =0A= =0A= Sent: =0A= Wednesday=2C September 25=2C 2013 12:01 AM=0A= Subject: =0A= RE: LF: TA CW?=0A= =20 =0A= Stefan=3B 73 kHz band is going to be difficult from my =0A= preliminary tests. Seems to be a lack of skywave. I think =0A= skywave is going to be rather scarce and best I am doing so far is out = =0A= to Kansas but it is ground wave am sure. Got to get the ground system = =0A= rolled out here soon as lawn mowing ends. That should help to =0A= give me more field strength on all the bands. Going to try 73 =0A= periodically and see what shakes out! I have worked PA0A on CW by ear =0A= last winter on 500. Yes our 500 licenses go down to 470 region. =0A= In winter we should have no trouble working CW by ear am sure and will = be =0A= looking forward to it as you would be even further away from me than = =0A= PA. I also worked into N. Ireland and I went to SSB and was heard and = =0A= worked Finbar=2C EI0CL [I forgot the suffix of his call] cross mode as = he has =0A= no SSB authorization. Jay=2C Warren and I work regularly Sunday evenin= gs =0A= on 510 upper throughout the Winter months. I see no takers for =0A= 73. Gary has a grabber on 73 for us and using QRSS 500 spec lab and I = =0A= tried last nite but never saw a trace. With ground system out this =0A= Winter his grabber may be a winner-Bob =20 =0A= =0A= =0A= Date: Wed=2C 25 Sep 2013 00:36:21 +0200 From: =0A= Stefan.Schaefer@iup.uni-heidelberg.de To: =0A= rsgb_lf_group@blacksheep.org Subject: LF: TA CW? Hi Bob=2C =0A= =20 Success! :-) Welcome! :-) Sorry i can't receive on 4000m here =0A= since my receivers are mono band homemade DC converters (for 137 kHz an= d 472 =0A= kHz) and direct sampling receivers at 0...24 kHz. But=2C i remember you =0A= were the strongest station on MF (is that 472...479 kHz for your licenc= e?) =0A= last season. Are you a CW man as well? Do you think it is realistic to = try =0A= for a TA CW QSO? If=2C then it could work in november to february. So f= ar i'm =0A= only getting sporadic WSPR-2 decodes at WD2XSH/17. My WSPR signal is QR= P =0A= though. At least VO1NA copied my signal in GN37OR last year... Worth a =0A= try? I'm continuously doing overnite WSPR-2 tests on 630m. 73=2C =0A= Stefan/DK7FC Am 24.09.2013 23:45=2C schrieb Bob Raide: =0A= =0A= =0A= =0A= All=3B With Stefan's help I seem to have finally made it =0A= into the group. I am Bob Raide W2ZM with exp. license's for =0A= 500=2C 137=2C and most recently 73 kHz band.=20 I am ready to fire up on =0A= 72.401 with Qrss 60 if anyone is interested to try for a capture =0A= tonite. Or I can change to 137 if no one is interested in 4000 =0A= meters. 500 kHz call-WE2XGR/6=2C 137-WE2XEB=2C 73-WG2XRS/4 Thanks all=2C =0A= Bob = --_867f81df-96dc-4ed0-96a6-439a20a18058_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Alan=3B
You most certainly go= t me thinking. =3B I =3Bam located on =3Bthe side of a mile lon= g drop to the East about a 1/4 mile down from the top on the =3Beast si= de of the hill. =3B Over 1/2 mile remains to the bottom where it is in = the village. =3B I have one small tree near me but nothing really aroun= d the self  =3Bsupporting tower that is 90'. =3B The two 150' legs = are about 35' off ground at the ends. =3B What I do have is my water we= ll 20' from the tower. =3B It is a large vein of water that flows from = the top of the hill down to the bottom and probably into Keuka =3BLake.=  =3B I never thought about connecting to the well casing as it is about= 30' drop to the water. =3B The water is hard as hell and am sure a goo= d conductor. =3B I am going to strap a chicken wire radial rite to it t= oday and will be on tonite again for any signs on Gary's =3B [G4WGT] 72= .4 QRSS 500 grabber. =3B
One problem is that I use this open wire f= eed ant for 80 and 160 as well as a vertical on 500=2C 137=2C and now 72.4.=  =3B I just fired up an hour ago and took =3Ban ant current measure= ment and optimized the tuning of the PA. =3B I will be interested to se= e if anything changes upon well casing connection.
It is interesting tha= t only 4-5 miles NE of here is the NE Headquartered Loran C 700' tower and = 1000KW defunct transmitter=2C etc. =3B It is still there but Obama shut= them all down to save a few bucks. =3B It is at the =3BSeneca Army= Depot and between Seneca and Cayuga Lakes. =3B The ground conductivity= near all the finger lakes is the highest in the state. =3B It may have= been placed there for the 100 kHz operation purposely[???}
Bob
 = =3B

From: alan.melia@btinternet.com
To: = rsgb_lf_group@blacksheep.org
Date: Wed=2C 25 Sep 2013 11:22:27 +0100
= Subject: Re: LF: TA CW?

=0A= =0A= =0A= =0A= =0A= =0A= =0A=
Hi Bob that sounds a good set-up. Excu= se my =0A= "telling Grandma how to suck eggs" (as we call it) in my last=2C but I have= seen =0A= many frustrated LF ops after much work and investment in copper=2C gain lit= tle in =0A= ERP :-)) It is all a matter of your local conditions.
=0A=
 =3B
=0A=
Yes the 150' runs of your dipole will = make =0A= substantial capacitive top load (~600pF) =3Bbut I guess they droop=2C a= s in an =0A= inverted "V"?? Paralleled wires help=2C provided they are spaced more than = about 3 =0A= feet apart=2C current direction is unimporant as they are not radiating. Th= ere are =0A= some interesting measurements on a small antenna at http://g3nyk.ham-radio-o= p.net/spiraltop.htm. =0A= It was a little impractical because of the windage :-)) but an interesting = =0A= experiment=2C that was stimulated by an article in a Canadian Broadcast =0A= Engineering journal. =3B (I hope all the links work....I have had some = =0A= troubles with them)
=0A=
 =3B
=0A=
Laurie G3AQC found the the more top ca= pacity he =0A= could add the lower his ground loss became and he finished with a meander t= hat =0A= gave around 1500pF I believe......at 6pF per metre you can see what that me= ans =0A= in length. By measurement we found that once the ground loss ceased to decr= ease =0A= by adding extra rods and wire.....doubling the top capacity would further h= alf =0A= the ground loss. =3BThe catch wa= s the top-load =0A= needed to be over "clear ground" not foliage (he had a bank of Rhododendron= s in =0A= his garden=2C and had to avoid going over those=2C or any roofs) The commer= cial =0A= stations use umbrella loading (CFH Halifax NS) or enormous "fans" at NAA Cu= tler =0A= Ma. The classic GBR Rugby "figure of eight" was filled-in in later years to= =0A= increase the capacity of the 16kHz antenna. This effect does seem to lie = =0A= unappreciated by a lot of ops but many can't use it because of lossy trees = and =0A= buildings in the region of their antenna.
=0A=
 =3B
=0A=
Of course as you will be well aware at= these power =0A= levels insulator loss=2C and corona =3Bstarts to be a major concern. I = think =0A= Warren has set fire to several lengths of plastic water pipe used as insula= tors =0A= and spreaders :-)) =3B =3B
=0A=
 =3B
=0A=
Best wishes. I am sure that =3Bif = you make the =0A= West to East =3B crossing on 73kHz you will be the first to do it in th= at =0A= direction.
=0A=
 =3B
=0A=
Alan
=0A=
G3NYK =3B =3B =3B=0A=
=0A=
----- Original Message -----
=0A=
From: =0A= Bob = Raide =0A=
=0A= =0A=
Sent: Wednesday=2C September 25=2C 2013 2:01 =0A= AM
=0A=
Subject: RE: LF: TA CW?
=0A=

=0A=
Alan=3B
I appreciate your input on 73. =3B It was= my idea to =0A= have Warren Zeigler file an app just to see what might happen at our =0A= FCC. =3B I had heard the staff at our FCC was instructed to welcome = =0A= experimenters for the lower freqs. =3B =3BWarren filed it but tol= d me =0A= nothing may come of it but they granted us the license!
I am using a t= ube =0A= amp [3cx3000A7] with pi-net output and can make 2 kw easily. =3B But = only =0A= have a 90' high tower and at the top is the center feed point of my 75 me= ter =0A= double extended zepp. =3B I simply short the open wire line which run= s =0A= almost vertically =3Band fed it with allot of inductance in series!&n= bsp=3BI =0A= assume the two 150' legs acts as top loading. =3BGround system is fro= m my =0A= broadcast experience where for field intensity surveys 36" wide =3Bch= icken =0A= wire was used with a 100' tower most often and a 250 =0A= transmitter. =3B =3BEight 50' chicken wire radials produced =0A= decent =3Bfield on the midband channels [1000 kHz or so] to measure = =0A= from. =3B Here I am using several 150' radials of chicken wire =0A= radials. =3B I hope to stretch some out to 300' but that's going to b= e about =0A= it at my location. =3B I have made it out to Kansas just two days ago= with =0A= solid QRSS 60 sigs daytime. =3B
I am running just about 1.5 KW in= to the =0A= ant. =3B The voltage at the feedpoint draws over a 2" spark to a scre= w =0A= driver so am about at the power top end I think.
Here in the finger la= kes =0A= region of NY State the winter ground conductivity goes to 8 or better to = the =0A= NE with several finger lakes East of me. =3B If I were on the coast I= think =0A= it would be a snap to hit the UK over the salt water. =3B Going to be= harder =0A= for me inland here.
Any comments would be appreciated-Bob
=0A=
=0A=
=0A= From: alan.melia@btinternet.com
To: rsgb_lf_group@blacksheep.org
Da= te: =0A= Wed=2C 25 Sep 2013 01:16:12 +0100
Subject: Re: LF: TA CW?

=0A= =0A= =0A=
Hi Bob=2C the propagation conditions= are very =0A= similar to the other LF bands ....there is skywave but the ground wave is= =0A= stronger further. The usual problem is antenna efficiency .....in rounded= =0A= figures 73 is 4 times more difficult than 136=2C which is 10 times more = =0A= difficult than 470/500.
=0A=
 =3B
=0A=
Beware of using HF or commercial "fo= lklaw" on =0A= ground systems You MUST measure as you go otherwise you will waste a lot = of =0A= time and dollars to no great effect. I measured Ground Loss in experiment= s =0A= with Finbar early in the 137 era (using a simple =0A= transformer-ratio-arm-bridge)=2C and rolling out "radials" can be a big = =0A= mistake.....it all depends on your environment. the first one or maybe tw= o =0A= make a difference then it gets you wont notice the difference To be effec= tive =0A= radials on amateur sizes antennas need to be at least 1/8 =0A= wavelength =3Bwhich is over half a mile! Unlike 160m skin depth in th= e =0A= ground can be 30 feet or more at these frequencies. A lookat commercial V= LF =0A= antennas is more helpful. They use massive capacity top loading=2C but th= ey can =0A= usually choose their site for its suitability.
=0A=
 =3B
=0A=
The only station to make the crossin= g on 73 when =0A= we still had it on this side was Laurie G3AQC (now SK) He was using 1200W= from =0A= an ex Decca Nav TX and a reasonably efficient antenna...... but not that = =0A= good.His ERP was probably close to 1watt.
=0A=
 =3B
=0A=
Best of Luck ..... =3B =3B i= ts a pity we will =0A= not get an allocation there again.
=0A=
Alan
=0A=
G3NYK (an original UK 73kHz "licence= " =0A= holder)
=0A=
=0A=
----- =0A= Original Message -----
=0A=
From: =0A= Bo= b Raide =0A=
=0A= =0A=
Sent: =0A= Wednesday=2C September 25=2C 2013 12:01 AM
=0A=
Subject: =0A= RE: LF: TA CW?
=0A=

=0A=
Stefan=3B
73 kHz band is going to be difficult from= my =0A= preliminary tests. =3B Seems to be a lack of skywave. =3B I thi= nk =0A= skywave is going to be rather scarce and =3Bbest I am doing so far = is out =0A= to Kansas but it is ground wave am sure. =3B Got to get the ground = system =0A= rolled out here soon as lawn mowing ends. =3B That should help = =3Bto =0A= give me more field strength on all the bands. =3B Going to try 73 = =0A= periodically and see what shakes out!
I have worked PA0A on CW by ea= r =0A= last winter on 500. =3B Yes our 500 licenses go down to 470 region.=  =3B =0A= In winter we should have no trouble working CW by ear am sure and will = be =0A= looking forward to it as you would be even further away from me than = =0A= PA. =3B I also worked into N. Ireland and I went to SSB and was hea= rd and =0A= worked Finbar=2C EI0CL [I forgot the suffix of his call] cross mode as = he has =0A= no SSB authorization. =3B Jay=2C Warren and I work regularly Sunday= evenings =0A= on 510 upper throughout the =3BWinter months.
I see no takers fo= r =0A= 73. =3B Gary has a grabber on 73 for us and using QRSS 500 spec lab= and I =0A= tried last nite but never saw a trace. =3B With ground system out t= his =0A= Winter his grabber may be a winner-Bob
 =3B
=0A=
=0A=
=0A= Date: Wed=2C 25 Sep 2013 00:36:21 +0200
From: =0A= Stefan.Schaefer@iup.uni-heidelberg.de
To: =0A= rsgb_lf_group@blacksheep.org
Subject: LF: TA CW?

Hi Bob=2C = =0A=

Success! :-) Welcome! :-)

Sorry i can't receive on 4000m= here =0A= since my receivers are mono band homemade DC converters (for 137 kHz an= d 472 =0A= kHz) and direct sampling receivers at 0...24 kHz.

But=2C i remem= ber you =0A= were the strongest station on MF (is that 472...479 kHz for your licenc= e?) =0A= last season. Are you a CW man as well? Do you think it is realistic to = try =0A= for a TA CW QSO? If=2C then it could work in november to february. So f= ar i'm =0A= only getting sporadic WSPR-2 decodes at WD2XSH/17. My WSPR signal is QR= P =0A= though. At least VO1NA copied my signal in GN37OR last year...
Worth= a =0A= try? I'm continuously doing overnite WSPR-2 tests on 630m.

73=2C= =0A= Stefan/DK7FC


Am 24.09.2013 23:45=2C schrieb Bob Raide: =0A=
= =0A= =0A= =0A=
All=3B
With Stefan's help I seem to have finally = made it =0A= into the group. =3B I am Bob Raide W2ZM with exp. =3B license= 's for =0A= 500=2C 137=2C and most recently 73 kHz band.
I am ready to fire u= p on =0A= 72.401 with Qrss 60 if anyone is interested to try for a capture =0A= tonite. =3B Or I can change to 137 if no one is interested in 400= 0 =0A= meters.
500 kHz call-WE2XGR/6=2C 137-WE2XEB=2C 73-WG2XRS/4
Than= ks all=2C =0A= Bob
= --_867f81df-96dc-4ed0-96a6-439a20a18058_--