---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 03/02/12: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:11 AM - Transponder antenna available (Robert L. Nuckolls, III) 2. 11:22 AM - Re: Transponder antenna available (Mike Nellis) 3. 12:42 PM - Re: Transponder antenna available (Charlie England) 4. 01:14 PM - Re: Transponder antenna available (Robert L. Nuckolls, III) 5. 02:09 PM - Radio speaker volume control (Paul Kuntz) 6. 05:29 PM - Re: Radio speaker volume control (Robert L. Nuckolls, III) 7. 06:24 PM - Re: Radio speaker volume control (Tim Andres) 8. 07:28 PM - Re: Radio speaker volume control (Paul Kuntz) 9. 07:35 PM - Re: Radio speaker volume control (Paul Kuntz) ________________________________ Message 1 _____________________________________ Time: 11:11:21 AM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Transponder antenna available I was digging around in the goodies box looking for a missing crimp tool and found this puppy . . . Emacs! I don't think this has ever been installed. $15 postage paid to first interested individual . . . Bob . . . ________________________________ Message 2 _____________________________________ Time: 11:22:02 AM PST US From: Mike Nellis Subject: Re: AeroElectric-List: Transponder antenna available On Friday, March 02, 2012 1:09:00 PM, Robert L. Nuckolls, III wrote: > I was digging around in the goodies box looking > for a missing crimp tool and found this puppy . . . > > Emacs! > > I don't think this has ever been installed. > > $15 postage paid to first interested individual . . . > > Bob . . . > I'll take it off your hand Bob. Do you take credit cards or PayPal? Other wise I'll stick $15 in an envelope. ________________________________ Message 3 _____________________________________ Time: 12:42:20 PM PST US From: Charlie England Subject: Re: AeroElectric-List: Transponder antenna available On 03/02/2012 01:09 PM, Robert L. Nuckolls, III wrote: > I was digging around in the goodies box looking > for a missing crimp tool and found this puppy . . . > > > I don't think this has ever been installed. > > $15 postage paid to first interested individual . . . > > Bob . . . > I'll take it, and thanks! How/where do you want payment? I can do Paypal, credit card, check, etc. I'll send my address to your email address. Thanks again, Charlie ceengland@bellsouth.net ________________________________ Message 4 _____________________________________ Time: 01:14:30 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Transponder antenna available At 01:21 PM 3/2/2012, you wrote: > >On Friday, March 02, 2012 1:09:00 PM, Robert L. Nuckolls, III wrote: >>I was digging around in the goodies box looking >>for a missing crimp tool and found this puppy . . . >> >>Emacs! >> >>I don't think this has ever been installed. >> >>$15 postage paid to first interested individual . . . >> >>Bob . . . > >I'll take it off your hand Bob. Do you take credit cards or PayPal? >Other wise I'll stick $15 in an envelope. You got it. I'll invoice you on PayPal. Bob . . . ________________________________ Message 5 _____________________________________ Time: 02:09:50 PM PST US Subject: AeroElectric-List: Radio speaker volume control From: Paul Kuntz I have a small 8-ohm speaker that I plan to connect to the speaker output of my XCOM-760 radio. For speaker volume control, do I simply wire a potentiometer into one of the wires going to the speaker, introducing a variable resistance in series with the speaker coil, or is something more specialized necessary? Regards, Paul Kuntz ________________________________ Message 6 _____________________________________ Time: 05:29:40 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Radio speaker volume control At 04:06 PM 3/2/2012, you wrote: >I have a small 8-ohm speaker that I plan to connect to the speaker >output of my XCOM-760 radio. For speaker volume control, do I >simply wire a potentiometer into one of the wires going to the >speaker, introducing a variable resistance in series with the >speaker coil, or is something more specialized necessary? There's a specialized device for direct control of speaker volume called an L-pad which has all the appearances of an ordinary potentiometer . . . Emacs! . . . but specifically designed to work with low impedance speakers. See: http://tinyurl.com/84jwt7v I think that radio's volume control affects both the headset and speaker volumes. Do you anticipate simultaneous use of both headphones and speaker such that independent control of each is necessary? If so, it could be that setting the radio's volume for the desired headset level will leave you short on speaker volume so that even with the l-pad set for wide-open, the speaker volume is found wanting. Bob . . . ________________________________ Message 7 _____________________________________ Time: 06:24:42 PM PST US Subject: Re: AeroElectric-List: Radio speaker volume control From: Tim Andres Paul the Icom A210 may be different, but on my plane I just used a SPST swit ch to turn the speaker on/off. Then the volume controls the speaker and head phones if the speaker is selected on, of course I don't use both at the same time so this has worked great. Tim Sent from my iPad On Mar 2, 2012, at 2:06 PM, Paul Kuntz wrote: > I have a small 8-ohm speaker that I plan to connect to the speaker output o f my XCOM-760 radio. For speaker volume control, do I simply wire a potenti ometer into one of the wires going to the speaker, introducing a variable re sistance in series with the speaker coil, or is something more specialized n ecessary? > > Regards, > Paul Kuntz > > ========================== ========= ========================== ========= ========================== ========= ========================== ========= > ________________________________ Message 8 _____________________________________ Time: 07:28:44 PM PST US Subject: Re: AeroElectric-List: Radio speaker volume control From: Paul Kuntz Bob, Thanks a lot for your quick and helpful reply. You are correct about there being only one volume control for headsets and speaker on this radio, and your comment about the relative volume of headsets and speaker was was right on. As soon as I read your reply, I went to the plane and hooked up the speaker, which arrived in the mail today. With the headset volume at a comfortable level, the speaker is audible at a level that doesn't need to be turned down further with a volume control, so adding a separate speaker volume control seems pointless. The L-pad tip was educational, nevertheless. It's now part of the great education in aircraft electrical systems that I have received from this forum, your excellent book and your posts here over the past several years. Regards, Paul Kuntz On Fri, Mar 2, 2012 at 5:27 PM, Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > At 04:06 PM 3/2/2012, you wrote: > > I have a small 8-ohm speaker that I plan to connect to the speaker output > of my XCOM-760 radio. For speaker volume control, do I simply wire a > potentiometer into one of the wires going to the speaker, introducing a > variable resistance in series with the speaker coil, or is something more > specialized necessary? > > > There's a specialized device for direct > control of speaker volume called an L-pad > which has all the appearances of an ordinary > potentiometer . . . > > [image: Emacs!] > > > . . . but specifically designed to work with > low impedance speakers. See: > > * http://tinyurl.com/84jwt7v* > > I think that radio's volume control affects > both the headset and speaker volumes. Do you > anticipate simultaneous use of both headphones > and speaker such that independent control of > each is necessary? If so, it could be that > setting the radio's volume for the desired headset > level will leave you short on speaker volume > so that even with the l-pad set for wide-open, > the speaker volume is found wanting. > > ** > > ** Bob . . . > ________________________________ Message 9 _____________________________________ Time: 07:35:25 PM PST US Subject: Re: AeroElectric-List: Radio speaker volume control From: Paul Kuntz Tim, I agree. A switch to turn the speaker on and off is really all that's needed, and even that seems somewhat redundant. See my other post just before this one. For pre-flight and post-flight radio use with the engine off, having the speaker on all the time seems just fine. With the engine running that the headsets at a comfortable volume, I suspect the speaker will be drowned out by engine noise. Regards, Paul Kuntz On Fri, Mar 2, 2012 at 6:22 PM, Tim Andres wrote: > Paul the Icom A210 may be different, but on my plane I just used a SPST > switch to turn the speaker on/off. Then the volume controls the speaker and > headphones if the speaker is selected on, of course I don't use both at the > same time so this has worked great. > Tim > > Sent from my iPad > > On Mar 2, 2012, at 2:06 PM, Paul Kuntz wrote: > > I have a small 8-ohm speaker that I plan to connect to the speaker output > of my XCOM-760 radio. For speaker volume control, do I simply wire a > potentiometer into one of the wires going to the speaker, introducing a > variable resistance in series with the speaker coil, or is something more > specialized necessary? > > Regards, > Paul Kuntz > > * > > * > > * > > * > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.