Noisy radio

Australian designed and manufactured Jabiru Aircraft/

Moderator: Moderators

  • Advertisement

User avatar
antonvalks
Stall training
Posts: 328
Joined: Wed Nov 04, 2009 6:43 pm

Noisy radio

Unread postby antonvalks » Sun Nov 05, 2017 6:52 am

I am one of those pilots who always seem unable to properly set or adjust the radio to have good comms. :oops: :oops: On the ground, engine off, 5/5 comms. Engine on, I immediately have a noisy radio and struggle to communicate both inside the aircraft and with tower or other traffic.

I found this on the internet http://www.jabiru430.com/Radio_noise.html which would indicate it is a common problem with the Microair radio and/or installation.

Can someone please explain how to go about setting the radio up. I just want to make sure it is not my stupidity that causes the radio noise. I have the volume and squelch knob on the radio as well as a seperate one for the internal comms.
Ensure you give yourself enough time to enjoy the fruits of your labor...retire early!!!
User avatar
Willie
1k poster
1k poster
Posts: 1296
Joined: Sat Jun 18, 2005 8:47 am
Closest Airfield: Hippo Pools
Location: Hippo Pools

Re: Noisy radio

Unread postby Willie » Mon Nov 13, 2017 12:45 pm

Hi
Do a test. Disconnect your voltage regulator an fly without it and the test your radio. Replace if needed.
Regards
Willie
ZS-UJC Hatz Bi-plane
ZS-UGS Evans VP 2
ZS-UNC & ZS- UUJ KR2
ZS-VTV Thunderbird MK4
ZU-EJD Thorp T-18
PPT Tecnam P2002 JF
Jabiru J400 ZU-VHB
Zenith 601 XL ZU-DVN
rainier
Frequent AvComer
Posts: 866
Joined: Thu Jul 27, 2006 10:33 am
Location: Somerset West

Re: Noisy radio

Unread postby rainier » Wed Nov 22, 2017 2:58 pm

One of our customers who works with a lot of Jabiru aircraft installs an MGL Avioguard to supply the radio. This device takes whatever power you throw at it, no matter how bad, and produces nice clean DC at 13.2V (even if the input voltage is less).
This sorts out trouble with any radio that is sensitive to electrical noise on its supply.

Rainier

antonvalks wrote:I am one of those pilots who always seem unable to properly set or adjust the radio to have good comms. :oops: :oops: On the ground, engine off, 5/5 comms. Engine on, I immediately have a noisy radio and struggle to communicate both inside the aircraft and with tower or other traffic.

I found this on the internet http://www.jabiru430.com/Radio_noise.html which would indicate it is a common problem with the Microair radio and/or installation.

Can someone please explain how to go about setting the radio up. I just want to make sure it is not my stupidity that causes the radio noise. I have the volume and squelch knob on the radio as well as a seperate one for the internal comms.
Who said the sky is the limit ? I think not.
User avatar
V5 - LEO
Fower Tousand
Fower Tousand
Posts: 4424
Joined: Mon Dec 05, 2011 4:18 pm
Closest Airfield: FYWH
Location: Namibia

Re: Noisy radio

Unread postby V5 - LEO » Wed Nov 22, 2017 3:24 pm

[quote="rainier"]One of our customers who works with a lot of Jabiru aircraft installs an MGL Avioguard to supply the radio. This device takes whatever power you throw at it, no matter how bad, and produces nice clean DC at 13.2V (even if the input voltage is less).
This sorts out trouble with any radio that is sensitive to electrical noise on its supply.

Rainier

....can you use it with all / most radios Rainier?
In God I trust. The masses are never right, the minority are sometimes right, but the truth is always right.
“One good teacher in a lifetime may sometimes change a delinquent into a solid citizen.” — Philip Wylie
zuepc
Wanna Fly
Posts: 3
Joined: Thu Nov 23, 2017 1:06 pm
Closest Airfield: FASY

Noisy radio

Unread postby zuepc » Thu Nov 23, 2017 5:09 pm

antonvalks wrote:I am one of those pilots who always seem unable to properly set or adjust the radio to have good comms. :oops: :oops: On the ground, engine off, 5/5 comms. Engine on, I immediately have a noisy radio and struggle to communicate both inside the aircraft and with tower or other traffic.

I found this on the internet http://www.jabiru430.com/Radio_noise.html which would indicate it is a common problem with the Microair radio and/or installation.

Can someone please explain how to go about setting the radio up. I just want to make sure it is not my stupidity that causes the radio noise. I have the volume and squelch knob on the radio as well as a seperate one for the internal comms.


Ensure that the radio screws home flush with the actual mounting. In my case the radio was 4mm short of home because the actual panel was not cut properly to allow this!
User avatar
flatprop
Incorrect Read back of ATC clearance
Posts: 133
Joined: Mon Jul 05, 2010 6:56 pm
Closest Airfield: Morningstar
Location: Durbanville

Re: Noisy radio

Unread postby flatprop » Thu Jan 18, 2018 8:32 pm

Hi used to have endless proplems with a MGL V6 radio that was so bad with interference in flight that normal communications was very difficult. As with the OP, it was 5/5 on the ground with engine and other electronic off.

Discussed with Rainier from MGL and he queried two things:
1. If I had any EFIS with screen (I did have the MGL Voyager system)
2. The distance of the antenna from the MGL EFIS screen.

Long story short, my antenna was too close to the EFIS screen (+/- 2m) and that caused the interference.
I relocated the antenna to the rear empenage (instead of above the cockpit) and problem sorted 100%.

To test, go fly and switch off your EFIS in flight, if comms improve your antenna is too close to the EFIS screen.

Pm me if you want to chat.

Gustav
Gustav Jansen
PPL(A), NR
namjab
Aircraft in Hangar
Posts: 13
Joined: Wed Oct 05, 2016 8:13 am
Closest Airfield: FYWE

Re: Noisy radio

Unread postby namjab » Wed Feb 14, 2018 9:22 am

Good morning everyone. I also have radio noise, but it is only when you ptt and testing a bit seems to be only when at full rpm.
It is a massively loud static noise, ear killing in fact only when talking to general traffic or towers. No noise on ground, no noise during finals where rpms are lower etc and also clear intercom regardless of rpm. It is only during ptt. I have the micro air and garmin setup with separate intercom. Garmin is used as primary, but even switching to micro air results in this same transmit noise.
I have switched off the efis in flight, no difference. Only slowing down engine seems to work at this stage. Traffic/tower have never complained about transmissions, i expect they are clear, but my ears don't agree.

Has anyone perhaps had similar issues that were resolved?

Thanks and have a great day
J430
Aircraft in Hangar
Posts: 17
Joined: Tue Sep 05, 2017 11:59 am
Closest Airfield: Australia

Re: Noisy radio

Unread postby J430 » Sun Feb 18, 2018 11:46 am

Is this a newly developed issue or has it always been there?

Also, can you check by switching off each mag/coil to see if they are both noisy?
User avatar
ZuluBen
Six Tousand
Six Tousand
Posts: 6565
Joined: Mon May 09, 2005 4:54 pm
Location: Gaborone, Botswana

Re: Noisy radio

Unread postby ZuluBen » Sun Feb 18, 2018 8:11 pm

Just make sure that you have NO usb devices in the plane.

Not even a Powerbank...

Creates havoc on an AM radio :shock:
namjab
Aircraft in Hangar
Posts: 13
Joined: Wed Oct 05, 2016 8:13 am
Closest Airfield: FYWE

Re: Noisy radio

Unread postby namjab » Wed Feb 21, 2018 9:02 pm

The noise has always been there. Will give the mag thing a go and let know.
I do not have any USB gadgets at all.
User avatar
Marius Schrenk
8000 Tousand
8000 Tousand
Posts: 8831
Joined: Mon Oct 05, 2009 3:34 pm
Closest Airfield: 300m from home
Location: Inni skadu van n kameeldoringboom.

Re: Noisy radio

Unread postby Marius Schrenk » Thu Feb 22, 2018 6:39 pm

We have had a similar thread long ago searched for it. From what I can remember the grounding of the engine was the reason :? the thick open wire at the starter corroded on the lug. :idea:
Politics attracts crooks and lawyers,most of the time its the same person.
User avatar
Pete
Too Tousand
Too Tousand
Posts: 2498
Joined: Mon Sep 19, 2005 7:09 pm
Closest Airfield: FAKR
Location: Preferably under a swashplate

Re: Noisy radio

Unread postby Pete » Thu Feb 22, 2018 8:31 pm

The correct grounding/ earthing is often overlooked, here is a great video on the basics of grounding comms in an aircraft to reduce radio noise.
https://www.youtube.com/watch?v=J08_p4O ... e=youtu.be



Return to “Jabiru”

Who is online

Users browsing this forum: CommonCrawl [Bot] and 0 guests