---------------------------------------------------------- Avionics-List Digest Archive --- Total Messages Posted Sun 04/19/09: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:48 AM - Side tone (Gordon Arbeitman) 2. 08:42 AM - Re: SL-60 for sale (swaneymj) 3. 09:34 AM - Re: Side tone (Doug McNutt) 4. 02:44 PM - Re: TeamGrumman-List: SL-60 for sale (teamgrumman@aol.com) 5. 02:48 PM - Re: Re: SL-60 for sale (teamgrumman@aol.com) ________________________________ Message 1 _____________________________________ Time: 07:48:30 AM PST US From: Gordon Arbeitman Subject: Avionics-List: Side tone My recollection of the Sigtronics is that they just allow the audio from a comm radio to be mixed in wiring with the intercom audio. No switching is provided "because I sleep better that way". You should be able to use the transmitter for a test with the intercom turned off. That way you would be absolutely sure any sidetone is coming fro the transmitter. If that doesn't work you should also be able to connect the mike to a "standard" mike jack and the phones to a "standard" phone jack but you might need a mike with a push-to-talk switch on it. You can make a PTT by grounding the tip of the mike connector. That's the tip of "ring, tip, and sleeve of the three terminal connector. The CP125 does not generate any sidetone by itself. The Sigtronics drives the headphones but, although it's quite the same, it's not called sidetone. The war department's problem with distortion could well be the presence of audio from the Sigtronics being mixed out of phase with sidetone from the transmitter. -- Thanks, that's helpful. Here are a few more questions: When I talk to the Sigtronics (comm radio off), I hear myself (sidetone). Is that coming from the Sigtronics ? If so, then I'm guessing that both the intercom and the COMM radio are putting out a sidetone, when I tranmit. If they are "out of phase", that would explain the distortion. Is there a reason why I shouldn't disable the radio's sidetone and just rely on the intercom sidetone? I almost always fly with the intercom on. ________________________________ Message 2 _____________________________________ Time: 08:42:07 AM PST US Subject: Avionics-List: Re: SL-60 for sale From: "swaneymj" Garmin will give you $2000 off the list price to trade in a GX-60 on a 430/530W. I assume that same would be true for an SL-60, too. I have a GX-60 and am working this deal with Stark Avionics. The offer is good through 2009. -------- Thanks, Mark Swaney F-1 Rocket #31, N76TR Read this topic online here: http://forums.matronics.com/viewtopic.php?p=240095#240095 ________________________________ Message 3 _____________________________________ Time: 09:34:38 AM PST US From: Doug McNutt Subject: Re: Avionics-List: Side tone At 10:47 -0400 4/19/09, Gordon Arbeitman wrote: >Thanks, that's helpful. Here are a few more questions: > >When I talk to the Sigtronics (comm radio off), I hear myself >(sidetone). Is that coming from the Sigtronics ? If so, then I'm >guessing that both the intercom and the COMM radio are putting out a >sidetone, when I tranmit. If they are "out of phase", that would >explain the distortion. Is there a reason why I shouldn't disable >the radio's sidetone and just rely on the intercom sidetone? I >almost always fly with the intercom on. The intercom really ought to be turning off its output to the headphones while a transmitter is keyed. It appears that it is not doing that. Intercom audio is being sent to all headphones at the same time. Strictly speaking, sidetone would be sent only to the headset that has its microphone activated. Are you , perhaps, keying the transmitter without telling the intercom about it? A push to talk switch on a control yoke might be doing that. The sidetone from the transmitter is derived from a point very late in the circuitry and is an indicator that the transmitter is working pretty much properly. If you turn that off you would lose a failure indication. It's been almost two decades since I have had a Sigtronics apart and I never owned one. I'll have a look at my records later today. There might be a schematic around. -- -> Stocks are getting pelloreid <- ________________________________ Message 4 _____________________________________ Time: 02:44:46 PM PST US Subject: Avionics-List: Re: TeamGrumman-List: SL-60 for sale From: teamgrumman@aol.com Thanks for the lead Gil. Russ, bought the SL-60 -----Original Message----- From: Gil Alexander Sent: Sun, 19 Apr 2009 12:03 am Subject: Re: TeamGrumman-List: SL-60 for sale --> TeamGrumman-List message posted by: Gil Alexander Gary, posted here... http://www.vansairforce.com/community/showthread.php?p=319199#post319199 Let me know when it sells and I will mark it appropriately gil A >--> TeamGrumman-List message posted by: teamgrumman@aol.com > >Sure, thanks. That's awesome. 0D ________________________________ Message 5 _____________________________________ Time: 02:48:57 PM PST US Subject: Re: Avionics-List: Re: SL-60 for sale From: teamgrumman@aol.com wish I had known -----Original Message----- From: swaneymj Sent: Sun, 19 Apr 2009 8:40 am Subject: Avionics-List: Re: SL-60 for sale Garmin will give you $2000 off the list price to trade in a GX-60 on a 430/530W. I assume that same would be true for an SL-60, too. I have a GX-60 and am working this deal with Stark Avionics. The offer is good through 2009. -------- Thanks, Mark Swaney F-1 Rocket #31, N76TR Read this topic online here: http://forums.matronics.com/viewtopic.php?p=240095#240095 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message avionics-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Avionics-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/avionics-list Browse Digests http://www.matronics.com/digest/avionics-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.