[AMPS] Directional coupler design
Barry Kirkwood
bjk@ihug.co.nz
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; =
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<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 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) 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> </DIV>
<DIV><FONT size=3D2></FONT> </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: </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: </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: </FONT></B> <FONT face=3DArial =
size=3D1>Dave=20
D'Epagnier</FONT> <BR><B><FONT face=3DArial=20
=
size=3D1>Subject: </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 hf reflectometers by an ARRL =
staffer. </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 <<A target=3D_blank=20
=
href=3D"http://www.waiheke.co.nz/signal.htm">http://www.waiheke.co.nz/sig=
nal.htm</A>></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 =
<<A=20
=
href=3D"mailto:DAVED@ctilidar.com">mailto:DAVED@ctilidar.com</A>>=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 <<A=20
=
href=3D"mailto:amps@contesting.com">mailto:amps@contesting.com</A>></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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