VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 04-18-2016, 02:01 PM
Rayh Rayh is offline
 
Join Date: Sep 2013
Location: Newark, WV
Posts: 76
Default Squeal with PTT

With only 9 hours in my 12 I started to get an intermittent squeal when I push my Pilot side PTT. Do not get it in the Co Pilot side. I set one of the soft keys on the Garmin radio to PTT and it doesn't squeal. Attempting to track it down. Any suggestions?
__________________
Ray in WV
N241RL

RV-12 806
Reply With Quote
  #2  
Old 04-18-2016, 02:32 PM
ArVeeNiner's Avatar
ArVeeNiner ArVeeNiner is offline
 
Join Date: Jun 2006
Location: San Jose, CA
Posts: 1,109
Default

Quote:
Originally Posted by Rayh View Post
With only 9 hours in my 12 I started to get an intermittent squeal when I push my Pilot side PTT. Do not get it in the Co Pilot side. I set one of the soft keys on the Garmin radio to PTT and it doesn't squeal. Attempting to track it down. Any suggestions?
I had a squeal during an intercom swap in my airplane the other day. Turned out it was one of the noise cancelling headsets. During my checkout of the installation, I had set the headset on the side of the fuselage (in the hangar of course) with one ear cup outside the fuselage and the other inside. This caused a squeal.

My suggestion is that if you are trying this with a noise cancelling headset, start your troubleshoting there.
__________________
Kelly Johnson
San Jose, CA
RV-9A

Pink slip issued: 5/7/12

First flight: 5/28/12, Memorial Day.

Phase I Complete: 8/18/12!

2019 donation: complete
Reply With Quote
  #3  
Old 04-18-2016, 07:07 PM
Pat Stewart Pat Stewart is offline
 
Join Date: Jan 2005
Location: Granbury Texas
Posts: 1,136
Default

Try the mic gain setting on the radio, go to the setup, key the mic and turn it down till the noise goes away. On mine the setting was 8
__________________
Built, RV 8, RV8A, RV 10, RV12, Purchased RV7A
Restored J3Cub and PA28R180
Pecan Plantation
Eagles Nest Mentor
EAA Tech Counselor

Last edited by Pat Stewart : 04-18-2016 at 07:12 PM.
Reply With Quote
  #4  
Old 04-18-2016, 09:04 PM
Rayh Rayh is offline
 
Join Date: Sep 2013
Location: Newark, WV
Posts: 76
Default

I will try that, thanks.
__________________
Ray in WV
N241RL

RV-12 806
Reply With Quote
  #5  
Old 04-19-2016, 04:00 AM
BigJohn BigJohn is offline
 
Join Date: Nov 2008
Location: Gloversville, NY
Posts: 1,575
Default

Quote:
Originally Posted by Rayh View Post
With only 9 hours in my 12 I started to get an intermittent squeal when I push my Pilot side PTT. Do not get it in the Co Pilot side. I set one of the soft keys on the Garmin radio to PTT and it doesn't squeal. Attempting to track it down. Any suggestions?
The problem on one side only does suggest something specific to the wiring on that side. Perhaps a grounding problem? The insulators in the mike jack can be tricky. Just a thought.
__________________
John Peck, CFII, A&P, EAA Tech Counselor, Flight Advisor.
“Master Pilot” Award, UFO Member.
RV-12 N37JP 120176 Flying since 2012.
One Week Wonder Build Team, OSH 2018.
VAF paid through 10/2019.
Reply With Quote
  #6  
Old 04-19-2016, 06:30 AM
Rayh Rayh is offline
 
Join Date: Sep 2013
Location: Newark, WV
Posts: 76
Default

Great thought. I will investigate that.
__________________
Ray in WV
N241RL

RV-12 806
Reply With Quote
  #7  
Old 03-30-2019, 03:32 PM
magiccarpet's Avatar
magiccarpet magiccarpet is offline
 
Join Date: Feb 2013
Location: Switzerland, Europe
Posts: 168
Angry Same issue

It seems that I have the same issue.
I noticed a squel (kind of a feedback) when I transmitting. It's better when engine is off or at low RPM and gets worse at cruise power. However, it varys and it is difficult to track down, but at least very annoying.
I changed sidetone parameter and tried with different volume settings, both at the I/C and at the headsets, but doesn't seem to really help much.

I am using Bose A20 headsets for both seats and a this Inflight solution to feed I/C audio to my GoPro 5
My Radio is a Garmin GTR225

If somebody has solved this or could provide more pointers to tackle this, that would be great.
Somewhere I read that a ferrite core might help.
__________________
Chris, RV-12 S/N 120832, HB-YSC
Phase I

Facebook: http://www.facebook.com/magic.carpet.aviation
YouTube https://www.youtube.com/channel/UCLw...nv3vJiqAYoE-dg

=VAF= dues paid for 2019
Reply With Quote
  #8  
Old 04-29-2019, 05:15 AM
Dgamble's Avatar
Dgamble Dgamble is offline
 
Join Date: Aug 2005
Posts: 822
Default

Quote:
Originally Posted by Rayh View Post
I will try that, thanks.
I had the same problem - it cleared up once I installed a dedicated ground wire on the female headset jack rather than counting on a washer in contact with the floor skin. It made a world of difference, but I'm not discounting the possibility that just fiddling with the jack fixed it. It also took out an annoying buzz in my videos when I did the same for the 1/8" jack that I use to capture headset audio.
__________________
Dave Gamble
Grove City, OH

RV-6 N466PG Purchased already flying - SOLD!

Built RV-12
http://www.schmetterlingaviation.com

The above web blogs and any links provided thereto are not instructional or advisory in nature. They merely seek to share my experiences in building and flying Van's RV airplanes.
Reply With Quote
  #9  
Old 04-29-2019, 06:54 AM
Mich48041 Mich48041 is offline
 
Join Date: Apr 2008
Location: Riley TWP MI
Posts: 2,821
Default

Headset jacks and mic jacks and music jacks should be mounted with insulating step washers so that the jacks do not touch the aluminum mounting surface.
__________________
Joe Gores
RV-12 Flying
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 10:50 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.