---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Fri 07/30/10: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:52 PM - Re: buried antennas (Gary Vogt) ________________________________ Message 1 _____________________________________ Time: 10:52:15 PM PST US From: Gary Vogt Subject: Re: TeamGrumman-List: buried antennas I've received several emails off line about the buried antennas. Summary: I first buried antennas in a Cheetah in 1990. On two occasions (in that plane) I could not talk to someone behind me. The first was a tower from an airport I was leaving (I think it was El Monte in SoCal). I responded but he called again. I rolled the plane to the left about 10 degrees, transmitted, then back straight. He heard me fine. The second time was at Pine Mountain Lake. It's a fly-in community near Yosemite National Park. The person I was talking to was taxiing behind me around the park. As we rounded a bend, I transmitted and he heard me fine. I buried the antennas in my second Cheetah also. Never had a problem. I buried one antenna in about 10 other planes without problems being reported back to me. I buried the antennas in my Tiger in 2004 about a month after I bought it. I've never had an incident where I couldn't talk to a tower or receive ATIS or anything else. In flight, in my Tiger, I've talked to planes over 300 miles away. Generally, I can pick up an ATIS 80 miles away over flat ground. I installed the buried antennas in the subject plane in the same fashion I did mine. Now we wait and see. ________________________________ From: 923te <923te@att.net> Sent: Wed, July 28, 2010 10:56:28 AM Subject: Re: TeamGrumman-List: buried antennas You mean Now you hear 'em now you don't ;) On Jul 28, 2010, at 11:17 AM, Gary Vogt wrote: now you see 'm, now you don't > > ________________________________ From: Gary Vogt >To: teamgrumman-list@matronics.com >Sent: Tue, July 27, 2010 8:29:33 PM >Subject: Re: TeamGrumman-List: buried antennas > > >With both antennas in the dorsal, the most forward antenna is acceptable aft. > I've found I can hear those behind me, but they can't hear me. I just roll out >and transmit, then roll back. > > ________________________________ From: 923te <923te@att.net> >To: "teamgrumman-list@matronics.com" >Sent: Tue, July 27, 2010 2:29:21 PM >Subject: Re: TeamGrumman-List: buried antennas > > >Blond spot = blind spot > > >Or is it the other way around... > thru the associative property? > > >On Jul 27, 2010, at 4:07 PM, 923te <923te@att.net> wrote: > > >With the dorsal fin hidden antenna I find there is a blond spot. It's pretty >bad sometimes. I had to relay ATC to Stu, who has the hidden ant, and have to >use the belly ant during all xcountries while using flight following. The dorsal >ant works great for forward towers but loses aft towers quickly >> >> >> >>Just a heads up...... >> >> >> >> >>On Jul 27, 2010, at 1:48 PM, Gary Vogt wrote: >> >> >>Here's a good one. >>> >>> >>>A fellow Grumman owner, Horatio (the name is changed to protect the innocent), >>>has always complained that his radios (comms) are really bad. He can hear >>>sometimes, but not always. He can be heard almost never. Last year he went to >>>Canada and was in fear of being shot down for crossing the border without >>>talking to anyone. Oh, he tried, but couldn't reach anyone. He told me that, >>>for the most part, the range on his radios was about 10 miles. He does have 4 >>>GPSs in his plane though. >>> >>> >>>Dave had his antennas buried years ago. But, never really knew where. Last >>>year, he found them: one was in the wing tip, the other in . . . . hold that >>>thought. The one in the right wing tip looked kind of like a flat 12"x12" >>>aluminum Christmas tree ornament. Last year, he came to me and asked me to >>>install install another one of these ornaments in the left wing tip. I laughed, >>>of course. There was no way I was going to waste my time installing another >>>antenna that doesn't work. I told him I'd install two antennas in the dorsal >>>fin if he wanted buried antennas (he was reluctant because he'd have to get it >>>painted.) He hemmed and hawed for months, finally agreeing to the new antennas. >>> >>> >>> >>>I prepped the dorsal fin channel and waited. He showed up yesterday. We went >>>to work. What I found was amazing: lots of cutoff coax going into the spar and >>>then going nowhere and an antenna in the right wing root. Yup. The second >>>antenna was attached to the honeycomb bulkhead in the wing root. Put it this >>>way, when you first step onto the wing walk, your first step is where the >>>antenna was. I found the LORAN antenna in the other wing root. They had to >>>have been installed with the wing off. I could not get to the screws. I had to >>>cut the nuts off with a Dremel and then cut the antennas in half to get them >>>out. The coax was sealed with some sort of epoxy where it goes into the cabin. >>> >>> >>> >>>I wonder what he'll do when he's able to hear ATIS or AWOS 80 miles away. He >>>may fly out of the local area again. >>> >>> >>>Gary >>> > =================================== t">http://www.matronics.com/Navigator?TeamGrumman-List =================================== ums.matronics.com">http://forums.matronics.com =================================== http://www.matronics.com/contribution">http://www.matronics.com/contribution================================== > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message teamgrumman-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/TeamGrumman-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/teamgrumman-list Browse Digests http://www.matronics.com/digest/teamgrumman-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.