Messages

31

Technical Support / Re: Audio Testing

« on: January 15, 2017, 01:10:44 pm »

There's quite a few Bluetooth devices out there, when looking I was making sure it had a good battery life and also using the latest protocols available.

Peter.... no Bluetooth headset 😂😂😂, love the shopping trip too 😬😬😬😬

I would certainly recommend the Bluetooth option to anyone that has Bluetooth headsets, less cables, no interference etc 😁😁 thanks Brinzlee on recommended this

I spent many hours checking things out to get to the bottom of this interference, everything was wired correctly, tried new power sockets, screened audio cable but to no avail didn't fix it so Bluetooth was the way to go...

32

Technical Support / Re: Audio Testing

« on: January 14, 2017, 05:12:48 pm »

Fixed my issue..... Bluetooth was the way to go

33

Technical Support / Re: Audio Testing

« on: January 10, 2017, 02:45:16 pm »

Out of interest, who was it at Trig who replied?

The contact at Trig was Lindsey Christie, same person I was emailing when I had issue with MGL and Trig compatibilities, all resolved now tho

34

Technical Support / Re: Audio Testing

« on: January 10, 2017, 12:33:19 pm »

OK, update on my interference issue.....

Trig saying all wiring to my TY91 is all OK, as standard communication is all clear, only when there is no transmission taking place you get the interference with PAW being plugged into my headset.

They have quoted the following 'USB chargers/adapters are fast becoming the no.1 RF noise problem for installers', now I've tried 2 Anker USB charges as well as another brand I borrowed from another SKR (not yours Lee  ) and I get the same result. I am now looking to changing my cigarette socket that this plugs into to see if this could make any difference, I don't think it would but I don't know what else to try.

35

Technical Support / Re: Audio Testing

« on: January 09, 2017, 10:43:15 pm »

Hi Lee

Just sent you an email for a replacement licence

Allan

36

Technical Support / Re: Audio Testing

« on: January 09, 2017, 06:57:11 pm »

I take it your ground loop isolator hasn't arrived yet?

Nope... still patiently waiting, should of been here on Friday. Not even received today so emailed them  this morning to find out they're on holiday till the 14/1/17, but it was posted on Wednesday. Hopefully it might turn up tomorrow 

Lee, popped into Sywell on my way home this evening and noticed they have removed your wings and stripped the coverings...... oh sorry that wasn't yours that's in for a major overhaul 

37

Technical Support / Re: Audio Testing

« on: January 09, 2017, 04:31:50 pm »

Hi Peter

would love to use pin 20, for AUX input to Trig, but I'm currently using this for my MGL Efis Explorer lite, I may have to go down the Bluetooth option

Allan

38

Technical Support / Re: Audio Testing

« on: January 09, 2017, 01:29:09 pm »

Thanks Lee,

After many hours of trying to identify this issue on a newly built SKR and now I'm back to square one...

I know its nothing to do with any power supply & groundings within the aircraft as I have fully gone over everything yesterday, plane still in bits, even tried 3 USB car power sockets and get the same result, 2 of them being the Anker brand as recommended 

Strange thing is, when the PAW is powered off all is ok  , when you power up using plane power then the noise begins 

So I'm at a lost.... I see your aircrafts been buried at the back of the hanger 

Allan

39

Technical Support / Re: Audio Testing

« on: January 09, 2017, 11:11:12 am »

Morning Peter & Brinzlee

I sent them an email late last night fingers crossed hope to get a reply today.

Peter, being you have a direct contact at Trig, if you are able to find out any info, that would be much appreciated as I know they can take some time in replying to emails.

Allan 

I've taken the below from the Trig Installation manual, so not sure who could be in the wrong  , although wiring diagram say something different.
________
5.6.12 Ground Returns
There are only 5 ground pins on the 25 way connector, at pins 1, 9, 10, 19 and 22. A full wiring loom with speaker, two headsets, two microphones, the TC90 connection, power and ground requires 9 ground connections. It is therefore necessary to double up connections to ground pins. This is usually achieved by bringing a short ground wire from a pin that then acts as a bus point inside the D shell.
________

40

Technical Support / Re: Audio Testing

« on: January 08, 2017, 09:44:38 pm »

Well after a day of taking my plane apart I believe I may have found the culprit which is causing the ground loop.

The problem is actually the earth on my Trig TY91 radio, if removed the problem goes away. Now what I've done was test all the earthing points on the 25 pin socket that connects directly to Trig radio only to find out that pin 22 has been joined with 9 & 19. Now I don't know if this is actually causing the problem as I'm unable to unsolder pin 22 as this has been all wired together with wire and then soldered too.

This was all done by Airworld UK when I purchased my Trig setup, I'm hoping that a fellow pilot may have the same setup as me with this pin not being wired to pins 9 & 19.



What I will do is speak to Trig tomorrow to see if this would actually will cause this interference !!!

With this connected I don't have any other issue, with internal intercom, talking to the ATC, no interference at all, that's until I hard wire my PAW using the AUX cable to my Bose headset.

I have tested my mobile using the same power supply as my iPad and created a Bluetooth connection to my Bose headset and all is ok, so it looks like my only option is to purchase a Bluetooth transmitter as recommended by Brinzlee.

I'm also waiting on delivery of my ground loop isolator, maybe this would resolve this too.

I am really annoyed if pin 22 is the culprit as I paid good money to have this wiring loom made up :-( :-(

Well tomorrow after work I'll have to put half my plane back together ;-);-)

41

Technical Support / Re: Audio Testing

« on: January 08, 2017, 09:35:39 am »

have you paired the bose to sky demon for audio alerts do you get any distortion with that ?

Morning,

Are you able to tell me what type of alerts will come from SkyDemon, would this be similar to the PAW, if this is the case I may use this method for getting traffic announcements 

Allan

42

Technical Support / Re: Audio Testing

« on: January 07, 2017, 06:07:06 pm »

This really is strange.....have you plugged any other audio source into the Bose A20.....try using the same lead to say your iphone and play an audio file.....have you paired the bose to sky demon for audio alerts do you get any distortion with that ?

While at the airfield today tried my iPhone using the same cable and all was ok, but if I plug into the same USB socket as the PAW to power my mobile I get this interference noise.

I'll have to have a look at this Anker USB socket as it must be this causing this problem, I wouldn't expect this as this is no cheap unit.

I don't get any other interference when 2 devices are being powered by this, i.e. iPad & PAW, no noise via the radio which I would expect if there are earthing issues.

Another job for tomorrow.

I was also told to remove the earth connection within the AUX cable which connects both together and this made no change

43

Technical Support / Re: Audio Testing

« on: January 07, 2017, 10:19:51 am »

Ok

I have modified my cable to a 4 pole socket and wired as per Raspberry Pi layout, this plugs into the PAW and on the other end I have the standard 3 pole socket, which then plugs into my Bose headset. Guess what..... still get the hiss !!!!

After looking though the raspberry forums this is a common problem, it seem you can still use a standard 3 pole sockets for audio only, if video is required than a 4 pole socket is required.

I have also copied one of the post below, regards to eliminating the hiss

---------
1. Add disable_audio_dither=1 to /boot/config.txt
2. Use an amplifier. The output is not meant to drive headphones directly.
3. Pick up a $7 USB audio adapter.
4. Pick up a $15 HDMI sound extractor.

The RPI was not sold as a high-fidelity audio device. These solutions will help. Try your HDMI extractor and please let us know how that worked for you!
--------

Out of interest has the: disable_audio_dither=1 been added to the PAW boot config file.

Maybe this is worth a try, I have not tried a ground loop isolator yet as still waiting for it to be delivered.

Not sure if I mentioned this but I even get this hiss from a brand new Raspberry Pi 2 v1.2, nothing installed, just powered straight from the box..... would this have a boot file from standard !!!

Kind regards

Allan

44

Technical Support / Re: Audio Testing

« on: January 05, 2017, 10:03:51 am »

Hi Brinsley

I think you may have resolved my issue, i have only tried the one cable within my aircraft, and that's the one supplied with my Bose A20 headset. I've tried another cable at home and was getting the same result, so automatically assume this would be the same in my aircraft :-). And yes when i am at home i don't have the GA sockets plugged in so yes i get the humming sound but if i plug into my amp all goes away. I will try and test this other lead when i pop up to Sywell over the weekend and fingers crossed all will be ok.

Out of interest both these leads are 3 pole 3.5mm sockets, should i be changing, or even trying a 4 pole socket cable as i know the Raspberry Pi 2 also transmits video, but if plugging into my bose headset surly these will be connected together, ie ring 2(ground) & sleeve(video) ....



If so i will need to purchase one of these and try..

Regards

Allan

45

General Discussion / Re: RPI 2 and rainbow screen

« on: January 04, 2017, 10:40:26 pm »

Hi Lee

Are you able to give us an idea when this newer software will be released as I have one of those newer raspberry Pi 2 v1.2. and if it's fully functional I could also test if required.

Kind regards

Allan