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Tom Mc

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  • Gender
    Male
  • Location
    Washington
  • Interests
    aircraft maintenance. SB and AD discussion. best mx practices. Lessons learned
  • Reg #
    N6402u
  • Model
    M20c
  • Base
    KPAE

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  1. The next step is to plug in my Fluke MM (Alt output to ground) and see it there is any AC signals. My Fluke Mod 87 s/b fast enough to see any transients. Coming off the BUS would work as well. TBD.... Any advice is well received.
  2. I just talked with Harztell tech support - they said no Cap on the Alt output. The install as shown above is correct. The Zeftronics R15300 is the noise filter- it can react fast enough to mitigate it...He didn't know how it all work inside the R15300. cheers
  3. Below is My Alt connections when i bought the airplane No Cap on install. I'll look for a large Cap (in line with output) later tomorrow... ...thoughts on install?
  4. In line or Parallel with the Alt output?
  5. My M20c (new to me) was converted to Zeftronics R15300 and ALY-8520Ls Hartzell alternator. My aircraft has been modified so many times I do not believe the 1962 wiring diagram is relevant for the charging system. Would the Alt/reg conv STC retain said capacitor? My question is - Is there a noise suppressing capacitor in the system? I have heard some older Mooney have them and some didn't... >I am having radio static issues.... >The Zeftronics R15300 and ALY-8520Ls Hartzell alternator were installed in 1999, how ever I replaced them last week due to charging failure. Static issue predates my replacements. > Equipment includes GNS530 and King KY 196. thanks
  6. Right- but it sounds like some of the battery box mounting hardware is thru the firewall...? I'll see the airplane again next week to confirm- but if there is hardware thru the firewall accessing it would be thru the avionics access panels.
  7. Oh, so I pull off the access panels top side in front of the windscreen to access the bolts... I am not at the airplane now, and I am new to working on old Mooney's. Those LH avionics access panels will give me access to the Battery box hardware?
  8. Thanks- I am also doing a Alt (ALY-8520LS replacement and Zeftronics R15300 regulator replacement. When I get my Alt/Reg I'll start the process next week. The BTM cowl will be difficult (R&R) on the ramp alone.... any hints of this process? You top down idea will require a step ladder/stool of sorts.
  9. I just bought my 1962 M20C and now I am starting to get it mechanically up to where i want it. 500 hr mag inspection is due. Left mag removal - looks like the Vac pump and the battery box need to be removed first. Any thought on access? Wow this look tight! And how to get to the oil sump screen? Crazy! Any advice on accessing these items?
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