VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.






VAF on Twitter:
@VansAirForceNet


Go Back   VAF Forums > Avionics / Interiors / Fiberglass > COMM
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 09-15-2022, 11:19 AM
fl-mike's Avatar
fl-mike fl-mike is offline
 
Join Date: Jul 2005
Posts: 1,807
Default

Looking at the spectragram, it looks like 3-phase 60Hz pulse modulations (the black dots in the spectragram) spread across some harmonics in the audio band.

I'm still guessing some big honkin' industrial welder or similar.

I can get a deeper look once IT gets my good audio analysis SW with 3D spectragrams installed on my new laptop. This is from freeware Audacity:
Attached Thumbnails
Click image for larger version

Name:	Drawing100.jpg
Views:	53
Size:	297.6 KB
ID:	30997  
__________________
Mike W
Venice, FL

N164WM RV-6A Slider/O-360/FP Sold 4/2022
N184WM (RV-8) Ready for inspection. Titan IOX-370/ CS/G3X
N184P reserved (RV-8QB) Empennage kit and QB wings in the shop
Reply With Quote
  #12  
Old 09-15-2022, 01:46 PM
F1R F1R is offline
 
Join Date: Nov 2010
Location: ____
Posts: 944
Default

Thanks Mike,

That is greatly appreciated. There are currently a few professionals involved in the hunt which is looking at several possible sources. Presently the on airport suspect is the Constant Current Regulator for the rwy lights. It may proceed to surrounding area equipment. So far it has not been able to be heard with a hand held VHF radio. Only the 3 ships previously mentioned.

The next few weeks will hopefully find the source and cure the problem.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 02:49 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.