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Message-ID: <1379002564.27322.YahooMailNeo@web133206.mail.ir2.yahoo.com>
Date: Thu, 12 Sep 2013 17:16:04 +0100 (BST)
From: M0FMT <m0fmt@yahoo.co.uk>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
In-Reply-To: <82A6D1DDC884424284D5B0BD2329A8CC@gnat>
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Subject: Re: LF: Re: Broadcast Ground Systems
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Hi All=0A=A0=0APlease send all radio and electronic books that are out of c=
opy-right to this web site http://www.tubebooks.org/technical_books_online.=
htmm where in due course they will be scanned and published for anyone to d=
own load for free. This ensures that=A0such works of art are not on one boo=
kshelf but on many.=0A=0A73 es GL Pete M0FMT IO91UX=0A=0A=0A_______________=
_________________=0A From: Alan Melia <alan.melia@btinternet.com>=0ATo: rsg=
b_lf_group@blacksheep.org =0ASent: Thursday, 12 September 2013, 1:16=0ASubj=
ect: LF: Re: Broadcast Ground Systems=0A  =0A=0AHi this is interesting read=
ing, but beware of applyiing it directly to =0Aamateur LF!. BC antennas are=
 usually monoples and the ground requirement for =0Athose is somewhat diffe=
rent to an amateur antenna where height is often =0Alimited and "T" or inve=
rted "L" antennas are used. Always size your ground =0Aextent by measuring =
the system, so that you know when to stop wasting copper =0Aand effort! Rad=
ials are only really effective if they are at least 1/8th =0Awavelength....=
that requires a lot of real estate at LF. Also BC engineers =0Acan often ch=
oose their site, amateurs rarely can.=0A=0AAlan=0AG3NYK=0A=0A----- Original=
 Message ----- =0AFrom: "David Weinreich" <David.Weinreich@globalstar.com>=
=0ATo: <rsgb_lf_group@blacksheep.org>; <600m@yahoogroups.com>=0ASent: Thurs=
day, September 12, 2013 12:34 AM=0ASubject: LF: Broadcast Ground Systems=0A=
=0A=0ADear LF/MFers,=0A=0AI have a copy of "Radio Broadcast Ground Systems"=
 that was prepared by Smith =0AElectronics of Cleveland, Ohio in 1972. The =
report provides a digest of =0Amaterial from Laport's book, the Antenna Eng=
ineering Handbook and the famous =0Aarticle by Brown, Lewis and Epstein fro=
m the IRE Proceedings. I will gladly =0Asend it to whoever wants it and is =
willing to pay the postage from =0ACleveland, Ohio. First come first served=
, referenced to e-mail arrival time.=0A=0ABest regards,=0A=0ADavid Weinreic=
h=0AWA2VUJ/8
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<html><body><div style=3D"color:#000; background-color:#fff; font-family:ar=
ial, helvetica, sans-serif;font-size:12pt"><div><span>Hi All</span></div><d=
iv><span></span>&nbsp;</div><div><span>Please send all radio and electronic=
 books that are out of copy-right to this web site <a href=3D"http://www.tu=
bebooks.org/technical_books_online.htmm">http://www.tubebooks.org/technical=
_books_online.htmm</a> where in due course they will be scanned and publish=
ed for anyone to down load for free. This ensures that&nbsp;such works of a=
rt are not on one bookshelf but on many.</span><br></div><div>73 es GL Pete=
 M0FMT IO91UX</div><br>  <div style=3D"font-family: arial, helvetica, sans-=
serif; font-size: 12pt;"> <div style=3D"font-family: times new roman, new y=
ork, times, serif; font-size: 12pt;"> <div dir=3D"ltr"> <div class=3D"hr" s=
tyle=3D"margin: 5px 0px; padding: 0px; border: 1px solid rgb(204, 204, 204)=
; height: 0px; line-height: 0; font-size: 0px;" contenteditable=3D"false"
 readonly=3D"true"></div>  <font face=3D"Arial" size=3D"2"> <b><span style=
=3D"font-weight: bold;">From:</span></b> Alan Melia &lt;alan.melia@btintern=
et.com&gt;<br> <b><span style=3D"font-weight: bold;">To:</span></b> rsgb_lf=
_group@blacksheep.org <br> <b><span style=3D"font-weight: bold;">Sent:</spa=
n></b> Thursday, 12 September 2013, 1:16<br> <b><span style=3D"font-weight:=
 bold;">Subject:</span></b> LF: Re: Broadcast Ground Systems<br> </font> </=
div> <div class=3D"y_msg_container"><br>Hi this is interesting reading, but=
 beware of applyiing it directly to <br>amateur LF!. BC antennas are usuall=
y monoples and the ground requirement for <br>those is somewhat different t=
o an amateur antenna where height is often <br>limited and "T" or inverted =
"L" antennas are used. Always size your ground <br>extent by measuring the =
system, so that you know when to stop wasting copper <br>and effort! Radial=
s are only really effective if they are at least 1/8th <br>wavelength....th=
at
 requires a lot of real estate at LF. Also BC engineers <br>can often choos=
e their site, amateurs rarely can.<br><br>Alan<br>G3NYK<br><br>----- Origin=
al Message ----- <br>From: "David Weinreich" &lt;<a href=3D"mailto:David.We=
inreich@globalstar.com" ymailto=3D"mailto:David.Weinreich@globalstar.com">D=
avid.Weinreich@globalstar.com</a>&gt;<br>To: &lt;<a href=3D"mailto:rsgb_lf_=
group@blacksheep.org" ymailto=3D"mailto:rsgb_lf_group@blacksheep.org">rsgb_=
lf_group@blacksheep.org</a>&gt;; &lt;<a href=3D"mailto:600m@yahoogroups.com=
" ymailto=3D"mailto:600m@yahoogroups.com">600m@yahoogroups.com</a>&gt;<br>S=
ent: Thursday, September 12, 2013 12:34 AM<br>Subject: LF: Broadcast Ground=
 Systems<br><br><br>Dear LF/MFers,<br><br>I have a copy of "Radio Broadcast=
 Ground Systems" that was prepared by Smith <br>Electronics of Cleveland, O=
hio in 1972. The report provides a digest of <br>material from Laport's boo=
k, the Antenna Engineering Handbook and the famous <br>article by Brown, Le=
wis
 and Epstein from the IRE Proceedings. I will gladly <br>send it to whoever=
 wants it and is willing to pay the postage from <br>Cleveland, Ohio. First=
 come first served, referenced to e-mail arrival time.<br><br>Best regards,=
<br><br>David Weinreich<br>WA2VUJ/8<br><br><br><br><br><br></div> </div> </=
div>  </div></body></html>
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