Fuel "Control monitor" or "Signal conditioner"

[edasmus]

Just got an interesting phone call from Aero-Mach Labs. They told me after receiving my original signal conditioner back at their shop for the third time (after I decided to keep the "overhauled" unit), they bench tested it again and found 5 more failed transistors. This really makes me wonder if the "overhauled" unit I now have is any better than the original one. They did say that under warranty for one year they would be happy to give my overhauled unit that I now have a free "check-up" to see how it is doing. I think I will do that in August/September 2009 when the airplane goes in for annual.

[Pete Somers]

Ed
That is rather annoying, as these people have had the box twice or is it three times and found faults that during the first test should have been cleared. You know it is much like the UK now to get a unit repaired like yours is almost impossible, to get a radio repaired in the UK is the same. The skilled people are just not here any more.
The Skymaster is a easy airplane to both service and troubleshoot all you have to do is go back a few years and think logically.

Regards
Pete

[edasmus]

Such is life my friend....such is life!!!

[edasmus]

I just wanted to give an update on my fuel guages. I have been flying with the "overhauled" signal conditioner about 6 months now (about 50 hours) and everything seems to be in good working order. When we first installed the replacement signal conditioner, I would occasionally see both fuel guages drop off line for a few seconds and then come back to life. I have not observed that behavior of the guages in probably the last 25 hours or so. They seem to be steady, and accurate. We shall see how long it lasts but for now, all is well.

Ed

[tkirklindale]

i have a 1966 337a my engine gages SUX to say the least i want to throw them out the window at 10k any one out there have any idea where to get stc gages. or to fix these POS gages i have thanks tom

[hharney]

https://www.ultra-fei.com/index.php?page=alltwins

[dwbomber]

I got fed-up with bouncing needles and went all digital on the engine instruments. Electronics Int. makes the manifold pres. , Tach, Oil Temp, and Oil Pressure. I really like the digital and bar graph fuel level instrument. It was from an outfit in Canada, I will have to look in my paperwork for their name. It was a pain to calibrate cause ya have to climb up a ladder with 1 gallon at a time. (1 gallon = around 10 milivolts) I will attach a pic and hope I can get it right....DW Note: The fuel level is toggled to the left tank after a recent flight. OOOps, I forgot about the Volts & Amps...also from Electronic Int. When the tanks are full, the bar graphs look kinda cool as they are green at the top! With todays fuel prices, it reminds me of what I have in my tanks...A whole lotta Green. Before my next flight, I will top them off and post a pic if anyone wants to see...Cheers

[kragby]

[quote=edasmus;13898]Just got an interesting phone call from Aero-Mach

Anyone have a schematic for the fuel monitor box? That would be helpful. Aero Mach repaired mine but it still didn't work - mechanic here too busy so I did some troubleshooting and found the shielded cable to the outer probe was shorted. After replacing the box would work after warming up for 15 minutes. Just a month out of warranty Aero Mach wants another 800 to repair again. I'd like to trouble shoot the unit myself but need a schematic. Greatly appreciate any help and happy to pay for copy.