Aerodon

Personally I think 3D printed caps are not up to any reasonable 'switch quality' to be used in an aircraft. I have several black or white ETA switches, what label and rating are you looking for? Don

It looks more like Ant In, 1 x G/S and 2 X VOR's to me. You don't want to leave any of these ports open, so looks like you need a new splitter. Might need antenna in, Nav 1 and Nav 2, or Nav 1, G/S 1 and Nav 2. Some Nave radios have internal splitters, some have two antenna connection and need an external splitter. Aerodon

And also check that you have the correct splitter / combiner and there are no 'open' ports. If ILS and VOR cables are switched, it will work but with very poor reception.

I now have all the avionics to go with this, so if you need a good IFR stack to fit into a single stack in a Mooney, this is the way to go. SL15 audio 1.3" GNS530 4.6" SL30 Nav/Com 1.3" SL70 Transponder 1.3" or GTX327 1.6" Total height 8.5" MD200-306 indicator for SL30 GI-275 for GNS530 (A G5 will work, but then you need a GAD29B to interface with the GNS530. Extra time to install, extra space needed. Aerodon

Frank, I have one, how do I tell if it is 3D? Don

Most likely the transducer or the wiring going to it. Here's a 'cheat', swap the fuel pressure and oil pressure transducers, see if the red X goes away or moves? Don't start the engine with transducers swapped, they are different pressure ratings.

Those are the annunciators required for an Apollo GX50/60 GPS.

I collect too much stuff in case I have a project to use it on. For those not familiar www.approachfaststack.com make a nice hub and spoke system for wiring up avionics that can really speed things up. Especially useful if you have the skills to assist with the installation. Mooneys have limited vertical space in their panels, so here is a mostly new system that would make a very neat installation in an older Mooney. Pro-G Hub, SL15 / PS7000 audio panel, GNS430/530, SL30 NavCom, GTX327 transponder, Transcal encoder, MD200 indicators. You do not need to take all the cables, and I will help figuring out all the components you might need. The system is well documented, so it is easy to wire devices like an EDM700 engine monitor into the Hub so that it sends and receives fuel flow information. It's hard to schedule time to do an avionics installation, and if you are not buying a $50k plus stack it is even harder. This is a way of getting a 'drop in' ready stack to minimize installation costs. Aerodon

On the EDM700/800/830 There are 8 CHT/EGT probes so 16 terminations. I find it tedious and boring, do not want to do it often. The harness and probes are the same part numbers as the EDM900. The FF, OAT, OT, RPM transducers are the same. The P1 power harness may or may not be the same. MP, FP, OP are different. With a bit of forethought, install the correct P1 harness etc and make a good logbook entry and then you are ready for a future EDM900 or 930 upgrade. The Garmin GI-275 EIS can use JPI probes, but the wires need to be re-pinned on the instrument side. I am not familiar with the EI or Dynon systems. Aerodon

Darryl Did you buy 2 MaxDim, or a combined unit? I went with the combined unit, so I can delete the incoming wire and associated circuit breaker to 'create' more panel space. I'm using one output for 'glareshield' and the other for compass, panel post lights and avionics (minimal). But no harm in installing 2 MaxDims and then keeping the same 'split' that Mooney used. You are correct, the Mooney drawing is hard to read. It looks like the glareshield and panel lights are grounded back to the unit via the shield? Look further down the Mooney drawing to see what they did? There is probably a quick connect near the glareshield? I don't understand the 'ground to decease panelights' is there a bright/dim switch somewhere? Aerodon

I have one of these Icarus relays for you to swap out?

Maybe the 20A breaker feeds the radio breakers above? Replace it with a breaker/switch and then you have an avionics master? Aerodon

It's quite possible that the EDM700 has an inline fuse to the busbar? I have replacement units that you can try for a quick change. Aerodon

We installed a GTX335 with its internal GPS and the built in encoder in our C172. I find the flight aware tracking much better that the various 978Mhz units. Installing an extra GPS antenna was a pain in the butt, but the internal wiring is easier. If I did it again I would look for a combined VHF/GPS antenna, but the hole patterns are 'wrong' for a Mooney. Mooney panels are short of space, so I am a big fan of remote mounted units - transponder, audio panel, DME etc. Don

Sounds like someone has bypassed the vacuum servo underneath the centre wing and replaced with a manual pull system? I've only seen the vacuum system, electric motor and integrated electric systems. Aerodon

Steve, I have the manual somewhere, and also looked up the lighted annunciator / switch on digikey once. You can also have a simple annunciator light and a pushbutton on the control wheel. Aerodon

Not the best picture, everything is hidden. I use yellow painters tape to provisionally locate each EGT and make sure i am not 'painting myself into a corner' with slip joints, baffles etc. A right angle drill with a short bit works well, otherwise you might have to take the exhaust off. Distance from cylinder is not super critical, I worry more about getting a nicely mounted probe. Half an inch is not going to make much of a difference in EGT and you are looking for trends and peak rather than absolute values. Aerodon

Yeah, I would get it welded, not difficult. Then plan ahead for all cylinders. I like drilling the holes on the inside, biting back at about 30-45 degrees. Makes it much easier to route the wires along with the CHT wires. And protected the probes from mechanical damage. Aerodon

I found a flat glare shield and am halfway through removing the hump. Aerodon

Scott, I found a wiring diagram for the KA124, it looks the same as the KMA24 (44 pin edge connector). So that is pretty likely compatible with the bottom connector on a PS7000. If you are lucky, th only thing that needs to be done is replace the pilots audio with stereo wiring. Then you add the new connector (another 44 pin edge connector) for all the music and stereo headsets - probably another 20 pins or so. Probably about the same amount of work as adding a standalone stereo intercom (I like PMA3000's) The problem we are all facing in many areas of the economy - when you have more work than you know what to do with, start on the $120k avionics upgrades where you can make $20k margin on ordering the avionics. And get the customer to pre-pay for the avionics. Completely eliminate the scrappy jobs - the ones that take up just as much hangar space and prevent you from doing the former. I think the hardest part is finding someone to help, not the technical issues. Don

I started to reply to your audio panel question and then got distracted. Old installations are always a mess, and the audio panel is the centre of the universe in the panel, so it is worth doing right. If you are moving things around, you may as well start again. There are guys around that will wire a complete stack for you for under $2k, including wiring. Retired people, moonlighting techs etc. without the shop overhead. It's probably a days work to take out all the old avionics and side panels, and another days work to install a 'panel ready' stack. I would do some layouts, and work out what you really want for the next few years and then do it. Aerodon

yeah, dumb move.

Yes, Mooney 252.

Kees, I have a complete 14V KFC200 autopilot that I will be removing from my 1980 Seneca for a GFC500 upgrade. (May as well do it now while I am installing a complete new stack). What parts do you need? The serves and controller are probably the same. The 'computer' came in different dash numbers, and a board for the flight director. I would try keeping yours going until a GFC500/600 becomes available? Don

I have a spare TSIO360MB core with 1750tt - lets get it overhauled and ready for when your engine really needs changing. Aerodon supercub180@gmail.com