---------------------------------------------------------- Avionics-List Digest Archive --- Total Messages Posted Thu 03/13/08: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:19 AM - Electrical Question () 2. 09:04 AM - Need two antennas for two radios?? (Don Morrisey) 3. 04:23 PM - Re: Need two antennas for two radios?? (Charles Reiche) 4. 07:15 PM - Re: Need two antennas for two radios?? (Noel Loveys) ________________________________ Message 1 _____________________________________ Time: 05:19:38 AM PST US From: Subject: Avionics-List: Electrical Question 3/12/2008 Hello Tom, You wrote: 1) "For clarification, the NC switch means that I press the button to actually cut the power. Why would this be used on an old military helicopter stick? What is the reason for cutting the power on a switch?" We used to say that having helicopter time in your logbook was like having an STD entry (Sexually Transmitted Disease -- it was called venereal disease back then) in your health record. So I will reluctantly admit that I did fly a helicopter (CH-46) for a year in Viet Nam. The cyclic grip had a button on it that when pressed would disconnect the electronic flight stability / attitude positioning system so that one could manually reposition the stick and the helicopter's attitude then releasing the button would reengage the electronic attitude positioning system. Maybe you have a control stick grip that does something similar. 2) "Again, is there any way I can wire it to work with my remote ident operation?" I am not the right guy to answer that question, but I am sure that by using two of the small "ice cube" type relays that ident operation could be accomplished. It might be a pretty awkward way of doing it though from an electrical viewpoint. I'll forward your question to the Matronic's aeroelectric-list and maybe one of the electrical experts there (even the great guru Bob Nuckolls) would take a shot at it. 'OC' Says: "The best investment we can make is the effort to gather and understand knowledge." PS: You can subscribe to this list here -- the daily digest is a great deal. One email inbound each day puts you in contact with the living beating heart of the homebuilder's electrical world. http://www.matronics.com/Navigator/?AeroElectric-List -------------------------------------------------------- ----- Original Message ----- From: "Tom Gibbons" Sent: Wednesday, March 12, 2008 12:25 AM Subject: Electrical question On my military surplus control stick I have 4 push buttons, 2 wired normally opened (NO) and 2 wired normally closed (NC). I really do not have access to these switches so I have to make due but can I use the NC switches somehow? I have plans for comm flip/flop, nav flip/flop, and Ident for my transponder. I actually have a "hattie" switch in the middle for trim which is not hooked up. The stick is installed with the ptt and intercom trigger switches working good. All kinds of switches on this guy. Was not going to use it but hey, it felt so comfortable, why not. For clarification, the NC switch means that I press the button to actually cut the power. Why would this be used on an old military helicopter stick? What is the reason for cutting the power on a switch? Again, is there any way I can wire it to work with my remote ident operation? Tom Paint this summer??? ________________________________ Message 2 _____________________________________ Time: 09:04:35 AM PST US From: Don Morrisey Subject: Avionics-List: Need two antennas for two radios?? Hello Listers, I am at the spot in cabin construction that I need to finalize what I'm doi ng for antennas. I have two radios (Garmin & Becker) and a PMA 4000 audio panel all nicely wired up by Stark Avionics. Do I need to install two antennas or one w/ a splitter? Any recommendation on antenna. I have the cheapie homebuilder's special fr om Spruce, but am thinking maybe I should upgrade. Thanks. Don...www.donsbushcaddy.comDon Morrisey's Skunkworks _________________________________________________________________ Need to know the score, the latest news, or you need your Hotmail=AE-get yo ur "fix". http://www.msnmobilefix.com/Default.aspx ________________________________ Message 3 _____________________________________ Time: 04:23:46 PM PST US From: "Charles Reiche" Subject: Re: Avionics-List: Need two antennas for two radios?? Install 1 CI 121 on the upper fuselage, and a CI 122 on the bottom. Feed them with rg142 or rg400. ----- Original Message ----- From: Don Morrisey To: avionics-list@matronics.com Sent: Thursday, March 13, 2008 11:58 AM Subject: Avionics-List: Need two antennas for two radios?? Hello Listers, I am at the spot in cabin construction that I need to finalize what I'm doing for antennas. I have two radios (Garmin & Becker) and a PMA 4000 audio panel all nicely wired up by Stark Avionics. Do I need to install two antennas or one w/ a splitter? Any recommendation on antenna. I have the cheapie homebuilder's special from Spruce, but am thinking maybe I should upgrade. Thanks. Don... www.donsbushcaddy.com Don Morrisey's Skunkworks ------------------------------------------------------------------------- ----- Need to know the score, the latest news, or you need your Hotmail=AE-get your "fix". Check it out. ________________________________ Message 4 _____________________________________ Time: 07:15:04 PM PST US From: "Noel Loveys" Subject: RE: Avionics-List: Need two antennas for two radios?? The short answer is two antennas... Especially if there are two transmitters. Noel From: owner-avionics-list-server@matronics.com [mailto:owner-avionics-list-server@matronics.com] On Behalf Of Don Morrisey Sent: Thursday, March 13, 2008 1:28 PM Subject: Avionics-List: Need two antennas for two radios?? Hello Listers, I am at the spot in cabin construction that I need to finalize what I'm doing for antennas. I have two radios (Garmin & Becker) and a PMA 4000 audio panel all nicely wired up by Stark Avionics. Do I need to install two antennas or one w/ a splitter? Any recommendation on antenna. I have the cheapie homebuilder's special from Spruce, but am thinking maybe I should upgrade. Thanks. Don... www.donsbushcaddy.com Don Morrisey's Skunkworks _____ Need to know the score, the latest news, or you need your HotmailR-get your "fix". 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