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In Car And Car To Pit Comms

Duncan

By Duncan,
in Motorsport Discussion & Builds

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Neil Grand Master

Neil

Posted
Posted

I borrowed handles headset and portable radio so I could have a play with it,,,now I'm no expert on this stuff but so far every bit of this kit looks quality. Nothing is light weight crap it all seems to be heavy robust equipment. Hope it works as good as it looks.

Took some pics of both,,,. Some interesting features included,,,it has 2 PTT's,,,one in the cable with volume adjustment and one on the headset. It also has an extra plug on the cable which you would presume is for a different radio.

post-29-0-71226500-1297159072_thumb.jpg

post-29-0-59030100-1297159090_thumb.jpg

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post-29-0-00588900-1297159130_thumb.jpg

"""Well I was just thinking, I could make the offer of walking around pit lane looking all important and testing your pit lane comms...""".

How does that work tiger,,,I fit it,,,you test it.

Cheers

Neil.

MBS206 Grand Master

MBS206

Posted
Posted

Well I wouldn't want all that heavy robust equipment hanging from an old mans head/kneck... You know, you're not as strong as you used to be Neil... :D

Plus, normally when ever I put something together I get someone else to try it... That way if it blows up or injuries occur, I'm standing a good 10metres away...

It actually looks nearly identical to the gear that I was using at Eastern Creek for Superlap last year.

If it is, those noise cancelling head phones are UNBELIEVEABLY good!

zebra Grand Master

zebra

Posted
Posted

Well I wouldn't want all that heavy robust equipment hanging from an old mans head/kneck... You know, you're not as strong as you used to be Neil... :D

Plus, normally when ever I put something together I get someone else to try it... That way if it blows up or injuries occur, I'm standing a good 10metres away...

It actually looks nearly identical to the gear that I was using at Eastern Creek for Superlap last year.

If it is, those noise cancelling head phones are UNBELIEVEABLY good!

Exept when you have an unusally large head like me..then fark did they hurt after the first day lol

  • 7 months later...
Duncan Grand Master

Duncan

Posted
  • Author
Posted

hmm been a while since an update.

Firstly, this setup is excellent. The quality and toughness of the components kills anything else I've seen right up to the big $$ stuff.

Secondly, the after sales service from PMD has been excellent. Quick answer of phone and email questions, and they re-programmed both radios to the new 80 channel setups + firmware upgrades at no cost. Even got a stubby cooler which was the clincher.

Finally....my car has interferance from the bloody wb 02 sensor controller. I've tried literally everything to seperate them, any time the intercom and 02 sensor are on there is interferance. I can't think of any solution but a relay to turn off the o2 sensor when I hit the push to talk button....any other ideas appreciated.

MBS206 Grand Master

MBS206

Posted
Posted

hmm been a while since an update.

Firstly, this setup is excellent. The quality and toughness of the components kills anything else I've seen right up to the big $$ stuff.

Secondly, the after sales service from PMD has been excellent. Quick answer of phone and email questions, and they re-programmed both radios to the new 80 channel setups + firmware upgrades at no cost. Even got a stubby cooler which was the clincher.

Finally....my car has interferance from the bloody wb 02 sensor controller. I've tried literally everything to seperate them, any time the intercom and 02 sensor are on there is interferance. I can't think of any solution but a relay to turn off the o2 sensor when I hit the push to talk button....any other ideas appreciated.

Move the cables away from each other? Run a shielded cable that is grounded?

Duncan Grand Master

Duncan

Posted
  • Author
Posted

Yeah I kinda skipped the troubleshooting, this is what I've tried.

Run the intercom off a seperate battery (ie no link to the car's electrical). Perfect

Run seperate earth for intercom (was shared). Interference

Run seperate power for intercom (was shared). Interference

Run sheilded + and - from battery to intercom, routed away from other wires. Interference

Add small (and later large) filter on the positive of both the intercom and o2 sensor. Interference

BTW the interference is not specific to the PMD gear, the Terraphone had the same issue.

MBS206 Grand Master

MBS206

Posted
Posted

have you tried running a diode on the power line as it goes into the O2 and on the earth cable and do the same on the PMD gear?

It would probably be useful to put a CRO across the power signals and see what the power signal actually looks like.

But a small setup with a few diodes and possibly a cap or two to clean it up should work well.

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