[QCWA] QCWA Digest, Vol 100, Issue 9

Thu Aug 16 12:39:08 EDT 2012

Better recheck the numbers. Connecting shield to (9) shorts the input. Ron 
W8RJL CH-119

----- Original Message ----- 
From: <qcwa-request at mailman.qth.net>
To: <qcwa at mailman.qth.net>
Sent: Thursday, August 16, 2012 12:00 PM
Subject: QCWA Digest, Vol 100, Issue 9

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> Today's Topics:
>
>   1. baluns part 6 (Jeffrey D Angus)
>   2. Re: baluns part 6 (Correction) (Jeffrey D Angus)
>   3. QCWA Chapter 12 Meeting notice (Arthur R. Rauch)
>   4. Re: QCWA Chapter 12 Meeting notice (Bob Roske)
>   5. Re: baluns part 7 (Jeffrey D Angus)
>   6. Dues # 34804 (William Lambing)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 15 Aug 2012 19:15:57 -0500
> From: Jeffrey D Angus <jdangus at att.net>
> Subject: [QCWA] baluns part 6
> To: qcwa at mailman.qth.net
> Message-ID: <502C3BBD.4060702 at att.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> 9:1 current balun
>
> (1)-uuu-(2)
> (3)-uuu-(4)
>
> (5)-uuu-(6)
> (7)-uuu-(8)
>
> (9)-uuu-(10)
> (11)-uuu-(12)
>
> Here we have three individual 1:1 current baluns.
> We can connect them to make a 9:1 impedance
> transformation at the same time as the balun
> operation.
>
> Connect (1) (5) and (9) to the coax center. (3) (7)
> and (9) to the shield. (inputs are in parallel)
> Connect the balanced load to (2) and (12) and tie
> (4) and (6) together and (8) and (10). (outputs are
> in series.)
>
> For this to work properly, both of the transmission
> lines have to be the correct impedance. In this case,
> 150 Ohm line.
>
> Again, 150 / 3 = 50 (parallel inputs) and 150 * 3
> = 450 (series outputs).
>
> Now if you're going to wind of these for yourself,
> you can use two types of two wire transmission lines.
>
> A pair of #16 AWG magnet wire using a piece of #18
> as a spacer works out to 150 Ohms. Interestingly
> enough, #16 AWG lamp cord available at Home Depot is
> fairly close as well.
>
> Jeff-1.0
> wa6fwi
>
>
>
> ------------------------------
>
> Message: 2
> Date: Wed, 15 Aug 2012 19:20:12 -0500
> From: Jeffrey D Angus <jdangus at att.net>
> Subject: Re: [QCWA] baluns part 6 (Correction)
> To: qcwa at mailman.qth.net
> Message-ID: <502C3CBC.1060807 at att.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> On 8/15/2012 7:15 PM, Jeffrey D Angus wrote:
>> Connect (1) (5) and (9) to the coax center. (3) (7)
>> and (9) to the shield.
>
> Connect (1) (5) and (9) to the coax center. (3) (7)
> and (11) to the shield.
>
> Oopsies.
>
> Jeff-1.0
> wa6fwi
>
>
>
> ------------------------------
>
> Message: 3
> Date: Thu, 16 Aug 2012 07:51:40 -0400
> From: "Arthur R. Rauch" <w4vz at bellsouth.net>
> Subject: [QCWA] QCWA Chapter 12 Meeting notice
> To: <Undisclosed-Recipient:;>
> Cc: QCWA 69 <qcwa69 at mailman.qth.net>, QCWA Reflector
> <QCWA at mailman.qth.net>
> Message-ID: <70A9ADEE7D4B4DE683ECB1601402DD55 at arthur9252b9ef>
> Content-Type: text/plain; charset="iso-8859-1"
>
> The next regular monthly meeting of The Andy Clark Chapter 12 QCWA will be 
> this  Saturday August 18th 12 noon at Piccadilly Classic American Cooking
>
> Bring a friend. Visitors are always welcome.
>
> See you there.
>
> Art Rauch W4VZ
>
> Secretary
>
> ------------------------------
>
> Message: 4
> Date: Thu, 16 Aug 2012 06:59:11 -0500
> From: "Bob Roske" <broske at hutchtel.net>
> Subject: Re: [QCWA] QCWA Chapter 12 Meeting notice
> To: "QCWA Reflector" <QCWA at mailman.qth.net>
> Message-ID: <BF672D17861B42B7AC8FF4B805066BE0 at BobsWeb>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> Piccadilly Classic American Cooking
> 8301 W Flagler Street
> Miami, FL
>
> http://www.qcwa.org/chapter012map1.html
>
> Just west of the south end of the 'Mall of the Americas'
>
> 73,
> Bob, N0UF
> QCWA Webmaster
> ----- Original Message ----- 
> From: "Arthur R. Rauch" <w4vz at bellsouth.net>
> To: <"Undisclosed-Recipient:;"@mailman.qth.net>
> Cc: "QCWA 69" <qcwa69 at mailman.qth.net>; "QCWA Reflector"
> <QCWA at mailman.qth.net>
> Sent: Thursday, August 16, 2012 6:51 AM
> Subject: [QCWA] QCWA Chapter 12 Meeting notice
>
>
>> The next regular monthly meeting of The Andy Clark Chapter 12 QCWA will 
>> be
>> this  Saturday August 18th 12 noon at Piccadilly Classic American Cooking
>>
>> Bring a friend. Visitors are always welcome.
>>
>> See you there.
>>
>> Art Rauch W4VZ
>>
>> Secretary
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>
>
>
> ------------------------------
>
> Message: 5
> Date: Thu, 16 Aug 2012 10:21:54 -0500
> From: Jeffrey D Angus <jdangus at att.net>
> Subject: Re: [QCWA] baluns part 7
> To: qcwa at mailman.qth.net
> Message-ID: <502D1012.5080106 at att.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Since choke baluns are made with specific impedance
> transmission lines, the next question would be, where
> can I find 100 ohm coax ohm coax?
>
> Especially if you don't feel like holding a critical spacing
> between two individual wires while winding a core.
>
> You can make it yourself.
>
> If you happen to have the March 2007 QST, or are an
> ARRL member and want to play with the archive search.
> "The quarter wave matching section revisited" by W1ZR
> <http://p1k.arrl.org/pubs_archive/108192>
>
> But for those of you that don't, here's the short version.
>
> (1)--center--(2)
> (3)--shield--(4)
>
> (5)--center--(6)
> (7)--shield--(8)
>
> (1) coax INPUT (2) coax OUTPUT and (7) ground INPUT
> (8) ground OUTPUT.
>
> Tie (3) and (5) together and (4) and (6) together. This
> puts the two sections of coax in series and results in a
> section of 100 ohm transmission line.
>
> (1)--center--(2)
> (3)--shield--(4)
>
> (5)--center--(6)
> (7)--shield--(8)
>
> (9)--center--(10)
> (11)--shield--(12)
>
> (1) coax INPUT (2) coax OUTPUT and (11) ground INPUT
> (12) ground OUTPUT.
>
> Tie (3) and (5) together, (4) and (6) together, (7) and (9)
> together and (8) and (10) together. This puts the three
> sections of coax in series and results in a section of 150
> ohm transmission line.
>
> Jeff-1.0
> wa6fwi
>
>
>
> ------------------------------
>
> Message: 6
> Date: Thu, 16 Aug 2012 11:47:58 -0400
> From: "William Lambing" <w0lpq9 at msn.com>
> Subject: [QCWA] Dues # 34804
> To: <QCWA at mailman.qth.net>
> Message-ID: <SNT125-DS2014A3B85512916A9D0A38D6B50 at phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
>
> My dues were paid in June, check cleared June 13th.  Have heard nothing 
> from anyone?
>
> Whazup??
>
> Bill, W0LPQ
>
>
> ------------------------------
>
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> End of QCWA Digest, Vol 100, Issue 9
> ************************************
> 