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[AMPS] Directional coupler design

To: <amps@contesting.com>
Subject: [AMPS] Directional coupler design
From: bjk@ihug.co.nz (Barry Kirkwood)
Date: Fri, 1 Dec 2000 08:07:26 +1300
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RE: [AMPS] Directional coupler designRadio Society of Great Britain, old =
chap!
try: www.rsgb.org
The Martin article was reprinted in a 73 publication "Radio Frequency =
Testers" 1973. Unfortunately does not cite the original source. Maybe =
pirated?! Does not give more theory than Breune but has some interesting =
things to say about metering.
The practical article in QST should be in your library. Only about 6mos =
or a year later as I recall. I used that info with success years back.
Now using a sense head ex Admiralty Marconi Tx (like Breune but uses two =
toroids instead of split winding) and old Swan two meter SWR box as read =
out!
Works well and cost about $10 all up from flea market, hi!
73


end
Barry Kirkwood PhD ZL1DD
Signal Hill
66 Cory Road
Palm Beach
Waiheke Island 1240
NEW ZEALAND
www.waiheke.co.nz/signal.htm
  ----- Original Message -----=20
  From: Dave D'Epagnier=20
  To: Barry Kirkwood=20
  Sent: Friday, 01 December, 2000 6:21 AM
  Subject: RE: [AMPS] Directional coupler design


  Barry, I found the QST article by Breune in a local library. What is =
RSGB?=20

  thanks,=20
  Dave=20

    -----Original Message-----=20
    From:   Barry Kirkwood [SMTP:bjk@ihug.co.nz]=20
    Sent:   Thursday, November 30, 2000 9:35 AM=20
    To:     Dave D'Epagnier=20
    Subject:        Re: [AMPS] Directional coupler design=20

    Hi Dave:=20
    There was an excellent article by Breune in QST back in the 60's, I =
think.=20
    This was followed some months later by an article on practical hf =
reflectometers by an ARRL staffer. =20
    RSGB also had a good one by Martin G3PDM.=20
    Sorry this so vague. You may be able to trace via ARRL or RSGB =
websites.=20
    73=20
    end
    Barry Kirkwood PhD ZL1DD
    Signal Hill
    66 Cory Road
    Palm Beach
    Waiheke Island 1240
    NEW ZEALAND
    www.waiheke.co.nz/signal.htm <http://www.waiheke.co.nz/signal.htm>=20

      ----- Original Message -----=20
      From: Dave D'Epagnier <mailto:DAVED@ctilidar.com>=20
      To: amps@contesting.com <mailto:amps@contesting.com>=20
      Sent: Friday, 01 December, 2000 4:25 AM=20
      Subject: [AMPS] Directional coupler design=20



      Hello Amp'eres,
      Can anyone point me to a good reference on theory and design of =
transformer type directional couplers for power sensing? In addition, =
I'm looking for a good reference on how to wind inductors and =
transformers once the desired inductance, turns ratio, core material =
etc. are determined and selected.

      Thanks,=20

      Dave
      K0QE=20


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<HTML><HEAD><TITLE>RE: [AMPS] Directional coupler design</TITLE>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 5.50.4134.600" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT size=3D2>Radio Society of Great Britain, old =
chap!</FONT></DIV>
<DIV><FONT size=3D2>try: <A=20
href=3D"http://www.rsgb.org";>www.rsgb.org</A></FONT></DIV>
<DIV><FONT size=3D2>The Martin article was reprinted in a 73 publication =
"Radio=20
Frequency Testers" 1973. Unfortunately does not&nbsp;cite the original =
source.=20
Maybe pirated?! Does not give more theory than Breune but has some =
interesting=20
things to say about metering.</FONT></DIV>
<DIV><FONT size=3D2>The practical article in QST should be in your =
library. Only=20
about 6mos or a year later as I recall. I used that info with success =
years=20
back.</FONT></DIV>
<DIV><FONT size=3D2>Now using a sense head ex Admiralty Marconi Tx (like =
Breune=20
but uses two toroids instead of split winding)&nbsp;and old Swan two =
meter SWR=20
box as read out!</FONT></DIV>
<DIV><FONT size=3D2>Works well and cost about $10 all up from flea =
market,=20
hi!</FONT></DIV>
<DIV><FONT size=3D2>73</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV>end<BR>Barry Kirkwood PhD ZL1DD<BR>Signal Hill<BR>66 Cory =
Road<BR>Palm=20
Beach<BR>Waiheke Island 1240<BR>NEW ZEALAND<BR><A=20
href=3D"http://www.waiheke.co.nz/signal.htm";>www.waiheke.co.nz/signal.htm=
</A></DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
  <A title=3DDAVED@ctilidar.com href=3D"mailto:DAVED@ctilidar.com";>Dave=20
  D'Epagnier</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A title=3Dbjk@ihug.co.nz=20
  href=3D"mailto:bjk@ihug.co.nz";>Barry Kirkwood</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Friday, 01 December, 2000 =
6:21=20
  AM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> RE: [AMPS] Directional =
coupler=20
  design</DIV>
  <DIV><BR></DIV>
  <P><FONT face=3DArial color=3D#0000ff size=3D2>Barry, I found the QST =
article by=20
  Breune in a local library. What is RSGB?</FONT> </P>
  <P><FONT face=3DArial color=3D#0000ff size=3D2>thanks,</FONT> =
<BR><FONT face=3DArial=20
  color=3D#0000ff size=3D2>Dave</FONT> </P>
  <UL>
    <P><FONT face=3DArial size=3D1>-----Original Message-----</FONT> =
<BR><B><FONT=20
    face=3DArial size=3D1>From:&nbsp;&nbsp;</FONT></B> <FONT =
face=3DArial size=3D1>Barry=20
    Kirkwood [SMTP:bjk@ihug.co.nz]</FONT> <BR><B><FONT face=3DArial=20
    size=3D1>Sent:&nbsp;&nbsp;</FONT></B> <FONT face=3DArial =
size=3D1>Thursday,=20
    November 30, 2000 9:35 AM</FONT> <BR><B><FONT face=3DArial=20
    size=3D1>To:&nbsp;&nbsp;&nbsp;&nbsp;</FONT></B> <FONT face=3DArial =
size=3D1>Dave=20
    D'Epagnier</FONT> <BR><B><FONT face=3DArial=20
    =
size=3D1>Subject:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></B> =
<FONT=20
    face=3DArial size=3D1>Re: [AMPS] Directional coupler design</FONT> =
</P>
    <P><FONT face=3DArial size=3D2>Hi Dave:</FONT> <BR><FONT =
face=3DArial size=3D2>There=20
    was an excellent article by Breune in QST back in the 60's, I =
think.</FONT>=20
    <BR><FONT face=3DArial size=3D2>This was followed some months later =
by an=20
    article on practical&nbsp;hf reflectometers by an ARRL =
staffer.&nbsp;</FONT>=20
    <BR><FONT face=3DArial size=3D2>RSGB also had a good one by Martin =
G3PDM.</FONT>=20
    <BR><FONT face=3DArial size=3D2>Sorry this so vague. You may be able =
to trace=20
    via ARRL or RSGB websites.</FONT> <BR><FONT face=3DArial =
size=3D2>73</FONT>=20
    <BR><FONT face=3DArial>end<BR>Barry Kirkwood PhD ZL1DD<BR>Signal =
Hill<BR>66=20
    Cory Road<BR>Palm Beach<BR>Waiheke Island 1240<BR>NEW=20
    ZEALAND<BR><U></U></FONT><U><FONT face=3DArial=20
    color=3D#0000ff>www.waiheke.co.nz/signal.htm &lt;<A target=3D_blank=20
    =
href=3D"http://www.waiheke.co.nz/signal.htm";>http://www.waiheke.co.nz/sig=
nal.htm</A>&gt;</FONT></U>=20
    </P>
    <UL>
      <P><FONT face=3DArial>----- Original Message ----- =
</FONT><BR><B><FONT=20
      face=3DArial>From:</FONT></B><FONT face=3DArial> Dave D'Epagnier =
&lt;<A=20
      =
href=3D"mailto:DAVED@ctilidar.com";>mailto:DAVED@ctilidar.com</A>&gt;=20
      </FONT><BR><B><FONT face=3DArial>To:</FONT></B><FONT =
face=3DArial></FONT><U>=20
      <FONT face=3DArial color=3D#0000ff>amps@contesting.com &lt;<A=20
      =
href=3D"mailto:amps@contesting.com";>mailto:amps@contesting.com</A>&gt;</F=
ONT></U><FONT=20
      face=3DArial> </FONT><BR><B><FONT =
face=3DArial>Sent:</FONT></B><FONT=20
      face=3DArial> Friday, 01 December, 2000 4:25 AM</FONT> =
<BR><B><FONT=20
      face=3DArial>Subject:</FONT></B><FONT face=3DArial> [AMPS] =
Directional coupler=20
      design</FONT> </P><BR>
      <P><FONT face=3DArial size=3D2>Hello Amp'eres,</FONT><FONT=20
      face=3DArial><BR></FONT><FONT face=3DArial size=3D2>Can anyone =
point me to a=20
      good reference on theory and design of transformer type =
directional=20
      couplers for power sensing? In addition, I'm looking for a good =
reference=20
      on how to wind inductors and transformers once the desired =
inductance,=20
      turns ratio, core material etc. are determined and =
selected.</FONT></P>
      <P><FONT face=3DArial size=3D2>Thanks,</FONT><FONT face=3DArial> =
</FONT></P>
      <P><FONT face=3DArial size=3D2>Dave</FONT><FONT =
face=3DArial><BR></FONT><FONT=20
      face=3DArial size=3D2>K0QE</FONT><FONT face=3DArial>=20
</FONT></P></UL></UL></BLOCKQUOTE></BODY></HTML>

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