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#21
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I would recommend that you get a unit with a music input. Not only can
you plug in CD players (something Jay already has), but you can plug in a handheld radio, cell phones, anything with a standard RCA music jack. |
#22
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Jay,
Based on my experience, I'd say there are two choices. Something from PS Engineering or whatever is in second place. Yes, the King KMA 28 is provided to Honeywell (...Allied Signal...Bendix...King, yada yada yada) as an OEM product designed and manufactured by PS Engineering. Likewise the SL-10 and SL-15 from Garmin-AT (...UPS AT...II Morrow...Apollo, yada yada yada) are also designed and manufactured by PS Engineering. They may great audio panels and intercoms. Their reputation for quality and support is a model of how gen av folks should run their business. I am flying behind the same stack that came with my plane when I bought it four years ago. The whole stack is vintage 1980 King Siler Crown, including a KMA-24. No complaints, and not a single need for repair yet. The intercom is a six place PS Engineering. I bought my previous plane without and intercom and installed a PS Engineering. Eventually, I will be upgrading the KMA-24 to a PMA 7000B. I've worked in aviation for the past 24 years, and have personally integrated their products with air-to-ground cellular and satellite systems. Since you already have a PS-Engineering intercom, the most costly part of your wiring has already been done, the wires from the panel to the cabin audio jacks. The easy way to wire it is to have an interface cable made up that can be put in place. That is, get a mating connector that is the same as the one on the back of your intercom. The PMA 7000B has two slide in connectors in the tray. The top connector is the intercom, which is the what you want for this harness. The audio panel wiring that you want to remove from the existing unit all wires to the lower connector. Slide the Narco intercom out, remove the tray fasteners and pull the tray out as far as possible. Then find out the pinout and get a one to one correspondence between the power connections and other avionics. The key is that all of these wires are already connected to your radios, and conveniently located at the back of the audio panel tray. Here is what you will likely need to re-connect: 1) Connection to the marker beacon receiver: 5 wires and one coax 2) Two VHF comm radios: 5 wires each, TX pair, RX pair, Gnd 3) Audio connections from two VORs: 2 wires each (might be the same GND if you have a Nav/Comm) 4) Audio connection to the ADF: Two wires 5) Audio connection to DME if applicable: Two wires 6) Direct wired pilot mic/PTT and headphone: 6 wires 7) All of your other wiring to mic and headphones, which go from the existing intercom to the top connector on the tray, and can be made on the bench. All in all, one harness that can be made on the bench for the audio, and about 30 more wires and one coax that have to be done in the plane - but they are already there. Remember to use twisted shielded pairs on all audio lines, and only bond the shield to airframe at one end, preferably the end that the audio comes from. Even that may already be taken care of pretty well. All of the nav radios are only RX at the audio panel, so should be bonded at the radio end. All you need to deal with is bonding of the two VHF comm TX pairs. It may not be trivial to get to. Mine is not too bad because the audio panel is at the top of the stack and I can remove a cooling grate on the top of the glareshield. It's worth talking this over with your radio shop to see if they agree. They could probably do the pre-wiring on the bench in about an hour. Re-connecting the radio wires to the new tray connector will depend on accessibility. Good luck, Brian Cox |
#23
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Based on my experience, I'd say there are two choices.
Wow. Brian, your response is a perfect example of why I hang out here so much. Thank you very much for the audio panel primer! -- Jay Honeck Iowa City, IA Pathfinder N56993 www.AlexisParkInn.com "Your Aviation Destination" |
#24
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I like the PS engineering 7000b audio panel. Mine is workign great for me plus
the have alot of additional attachments if you want them. Jay Honeck wrote: My Narco audio panel works just fine. However, the faceplate has been glued back together twice by my avionics shop. (How it got broken in the first place is anyone's guess...) In the recent intense cold, the epoxy has let go again, so I think it's time to replace the unit. Other than requiring the marker beacon lights/receiver to be built-in, I have no prerequisites. Well, it would be nice if it fit in the same hole without too much bother. Any recommendations? -- Jay Honeck Iowa City, IA Pathfinder N56993 www.AlexisParkInn.com "Your Aviation Destination" |
#25
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In article mCRPb.122933$8H.317848@attbi_s03, Jay Honeck
wrote: 2. There is the obvious problem of me being clueless with regards to building the thing. Make it out of wood, and I'll build it with dovetail joints -- but electricity is a mystery to me. Colonel Weir puts out one of the most complete, easy to read, easy to understand manuals I have ever come across in an electronics kit. As I understand the process, some of his Alpha- and Beta-testers/reviewers have fresh minds, untainted by previous electronics experience. If they come to him for clarification, the manual gets edited until there are no more questions. Jay, as long as you know which end of the soldering iron to hold, you can follow Jim's instructions and build one of his kits and it will work. |
#26
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Jay, as long as you know which end of the soldering iron to hold, you
can follow Jim's instructions and build one of his kits and it will work. Ow! Ow! Ow! Whoops, wrong end... ;-) Ah, hell, I suppose if I can build a fuel truck (ain't never done THAT before, neither!), I can build an audio panel, too. Trouble is, all I *really* need is the stupid faceplate. Narco wants TWO HUNDRED BUCKS for this stupid plastic faceplate! Augh! Sometimes I hate aviation, God help me... ;-) -- Jay Honeck Iowa City, IA Pathfinder N56993 www.AlexisParkInn.com "Your Aviation Destination" |
#27
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Kenny Faeth (Faeth Aircraft Salvage) out in Sacramento specializes in
"previously owned avionics" as well as a lot of other used airplane parts. I'll bet you can find one from him. If you need his phone number, I can look it up, but I also think you can google him and find it. Tell him Jim sent you and he will only charge double what it is worth rather than the usual triple {;-) Jim "Jay Honeck" shared these priceless pearls of wisdom: -Trouble is, all I *really* need is the stupid faceplate. Narco wants TWO -HUNDRED BUCKS for this stupid plastic faceplate! Augh! Jim Weir (A&P/IA, CFI, & other good alphabet soup) VP Eng RST Pres. Cyberchapter EAA Tech. Counselor http://www.rst-engr.com |
#28
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I'm not totally up to speed on this thread, but reading between the lines
of your post Jay - there are companies that advertise to the airplane homebuilders to make custom panels, inserts, faceplates, engravings, etc., etc. Just look in the back of your EAA, Sport Flying you are a member, of course Ayund, your local sign shops may also offer such services... Look also to trophy shops who make various plaques, etc... Jeez, too hunnert bucks should get you one that lights up, blinks, and plays the Marseilles when you transmit... denny "Jay Honeck" wrote in message news:TIcRb.27547$U% Trouble is, all I *really* need is the stupid faceplate. Narco wants TWO HUNDRED BUCKS for this stupid plastic faceplate! |
#29
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$200 for a new faceplate! Mind you, compared to $1500 for a new
audio panel, plus $$$ rewiring everything, it may be a good investment! Paul "Jay Honeck" wrote in message news:TIcRb.27547$U%5.179540@attbi_s03... Trouble is, all I *really* need is the stupid faceplate. Narco wants TWO HUNDRED BUCKS for this stupid plastic faceplate! Augh! |
#30
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"EDR" wrote in message
... Jay, as long as you know which end of the soldering iron to hold I guess people learn this one rather quickly. Paul |
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