---------------------------------------------------------- Pulsar-List Digest Archive --- Total Messages Posted Tue 02/03/15: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:15 AM - Re: NORAD (myrontruex) 2. 09:29 AM - Re: NORAD (Ron Koval) 3. 11:51 AM - Re: (no subject) (Emil Sr) 4. 12:41 PM - Re: NORAD (Ron Koval) ________________________________ Message 1 _____________________________________ Time: 05:15:07 AM PST US From: "myrontruex" Subject: Re: Pulsar-List: NORAD NORAD Since you have transmitting and receiving problems it is most likely the antenna. First thing to do is put an ohmeter on the connector to see if it has shorted. If it is not shorted then cut it off a few inches back and install a new one. As suggested a new copper one behind the baggage compartment will work but getting in there is not easy of course. Years ago a friend bought an antenna that was basically the same but was built on a piece of light weight material that allows it to follow the curve of his fuselage. From: Larry Wheat Sent: Monday, February 02, 2015 3:53 PM Subject: Re: Pulsar-List: NORAD I had to do the same thing on my Pulsar III. If you remove the rudder you can access the two rivets that connect the 1/2 wave dipole glued to the rudder. Just clip the cable and pull out. When you install the antenna don=92t forget about the ground plane. You can use aluminum tape or fab on out of thin aluminum. I made mine out of soft aluminum sheet (easier to get the contour) and glued in place. Did a test after installation and SWR was 1.7 to 1 MUCH better than I thought I would get. Any help I can render feel free to contact me. Larry Wheat 206 819-2352 J250 Moses Lake, Washington USA On Feb 2, 2015, at 12:33 PM, pilot623 wrote: I realized shortly after takeoff from Houston yesterday that radio reception was almost nonexistent and transmission was nonexistent. After dodging controlled airspace at Abilene and Lubbock, I arrived Clovis (KCVN) without issue. Once on the ground, the local FBO said he had received a call from DHS about me but he assured them I was an expected arrival. Besides that, I was squawking 7600 the whole way. My guess is an antenna problem which would be the easier (cheaper) fix. My com antenna is built into the vertical stab so access there is long gone but I would be able to install an antenna behind the baggage area by clipping the coax and installing a new connector. My question for the group is what recommendations do you have for com antennas that can install and operate inside the airframe? I'm having the radio bench tested before making my next move. Oh, and I have ordered an I-com handheld which I've wanted to do forever. Jim N623JF href="http://www.matronics.com/Navigator?Pulsar-List">http://www.matron ics.com/Navigator?Pulsar-List href="http://forums.matronics.com/">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c ontribution ________________________________ Message 2 _____________________________________ Time: 09:29:07 AM PST US From: Ron Koval Subject: Re: Pulsar-List: NORAD Jim, One thing to note when taking in all of the antenna options that are being posted is making sure you match your radio's output specifications. My radio and even the Icom radio specifications (and I would expect all Com radios), require a 50 ohm impedance. Some even specify a vertical antenna. Impedance matching to the antenna has allot to do with antenna design. Even if there is some mismatch, the radio will work, but not at its maximum designed output and input performance. Antenna manufacturers when they have a 50 ohm specification, it is just that (by design factors of whip length, material used, diameter size, cable/connector conductor spacing ...). A dipole antenna can work, but in theory it has an impedance of 73 ohms resistance and 43 ohms reactance. This can be adjusted by the size of wire, changing ideal length of the dipole (in this case shorter than quarter wave and as well as other mechanical elements), but will you know you have a 50 ohm impedance. Just like getting SWR under 2.0, making sure you have the proper impedance match should be taken into consideration. Ron ________________________________ From: pilot623 Sent: Monday, February 2, 2015 2:33 PM Subject: Pulsar-List: NORAD NORAD I realized shortly after takeoff from Houston yesterday that radio reception was almost nonexistent and transmission was nonexistent. After dodging controlled airspace at Abilene and Lubbock, I arrived Clovis (KCVN) without issue. Once on the ground, the local FBO said he had received a call from DHS about me but he assured them I was an expected arrival. Besides that, I was squawking 7600 the whole way. My guess is an antenna problem which would be the easier (cheaper) fix. My com antenna is built into the vertical stab so access there is long gone but I would be able to install an antenna behind the baggage area by clipping the coax and installing a new connector. My question for the group is what recommendations do you have for com antennas that can install and operate inside the airframe? I'm having the radio bench tested before making my next move. Oh, and I have ordered an I-com handheld which I've wanted to do forever. Jim N623JF ________________________________ Message 3 _____________________________________ Time: 11:51:47 AM PST US From: Emil Sr Subject: Re: Pulsar-List: (no subject) On 1/28/2015 5:50 PM, GREGSMI@aol.com wrote: Hi All Made hotel reservations today see y'all in May Emil Radtke N143NB > > We are full speed ahead for the Pulsar reunion. It will be May 28 31 > in Lawrence, Kansas. We will be staying and meeting at the Holiday Inn > Express. Please call 785-749-7555 to make your room reservations and > be sure to tell them you are with the Pulsar group to get the special > rate of $65/night. > > After many years of great service our caterer has retired. Our new > caterer comes highly recommended but the prices are higher. The cost > for the event is $135/each. Please send your check and reservations to > > Greg Smith > > 4404 SE Gemstone LN > > Topeka, KS. 66609 > > Please indicate if you will be flying in your Pulsar. > > The event schedule will be the same as in the past. > > May 28 > > Arrivals at Lawrence airport. > > Pizza and drinks at the hotel meeting room at 6:30PM > > May 29 > > 7AM breakfast at hotel meeting room. > > 8:30 12seminars > > 12-1:30Lunch served at hotel > > 2-5 seminars > > 6PMBarBQ served at hotel > > May 30 > > 7AM Breakfast at hotel > > 8:30 drive to airport for flying > > 12 Lunch served at airport > > 5PM return to hotel > > 6:30 Prime Rib dinner served at hotel > > 7:30 short program > > May 31 Breakfast and departures > > * > > > * ________________________________ Message 4 _____________________________________ Time: 12:41:21 PM PST US From: Ron Koval Subject: Re: Pulsar-List: NORAD Jim, One thing to note when taking in all of the antenna options that are being posted is making sure you match your radio's output specifications. My radio and even the Icom radio specifications (and I would expect all Com radios), require a 50 ohm impedance. Some even specify a vertical antenna. Impedance matching to the antenna has allot to do with antenna design. Even if there is some mismatch, the radio will work, but not at its maximum designed output and input performance. Antenna manufacturers when they have a 50 ohm specification, it is just that (by design factors of whip length, material used, diameter size, cable/connector conductor spacing ...). A dipole antenna can work, but in theory it has an impedance of 73 ohms resistance + 43 ohms reactance. This can be adjusted by the size of wire, changing ideal length of the dipole (in this case shorter than quarter wave and as well as other mechanical elements), but will you know if you have a 50 ohm impedance. Just like getting SWR under 2.0, making sure you have the proper impedance match should be taken into consideration. Ron ________________________________ From: pilot623 Sent: Monday, February 2, 2015 2:33 PM Subject: Pulsar-List: NORAD NORAD I realized shortly after takeoff from Houston yesterday that radio reception was almost nonexistent and transmission was nonexistent. After dodging controlled airspace at Abilene and Lubbock, I arrived Clovis (KCVN) without issue. Once on the ground, the local FBO said he had received a call from DHS about me but he assured them I was an expected arrival. Besides that, I was squawking 7600 the whole way. My guess is an antenna problem which would be the easier (cheaper) fix. My com antenna is built into the vertical stab so access there is long gone but I would be able to install an antenna behind the baggage area by clipping the coax and installing a new connector. My question for the group is what recommendations do you have for com antennas that can install and operate inside the airframe? I'm having the radio bench tested before making my next move. Oh, and I have ordered an I-com handheld which I've wanted to do forever. Jim N623JF ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message pulsar-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Pulsar-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/pulsar-list Browse Digests http://www.matronics.com/digest/pulsar-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.