Hi everyone, I need a radio guru to help us with our in-car radios! We keep having troubles, now i can hear the crew but they cant hear me! HELP ME!!!!!!!!!!!

 

Your crew can't hear you because they hear too much background noise? Or they can't hear you because it's all staticky?

 

The problem is when i push my talk button nothing is happening. I must have a bad wire or connection somewhere in the harness.

 

So your PTT button is busted... take apart and check connectors, repeated use from wear and tear could easily break things.

BTW, how's my car doing? They looked or perhaps Scarboro mazda have looked at my engine mounts yet? It's the excessive vibration issue I was talkinga bout that wasn't there before.

 

Its not in the push button the radio guy at Mosport checked it and said its fine. Eurasia has ordered the passenger side engine mount for your car, should be in tomorrow morning.

 

So what do your crew hear then when you try to communicate with them?
a) nothing
b) something, but unclear
c) static?

 

The crew hears nothing

 

bump...anyone help?


Al, maybe you cacn post it in performance / racing section as well?

 

I'll bring my multimeter tomorrow. We'll megger the wires and systematically find the fault.

 

Check and see if the radios are set up with a frequency offset

\ie they send on one freq and receive on another....

 

Thanks Footman for helping out in the diagnosis of the problem...we should be able to fix it before the race this Sunday...hopefully it wont rain doh

 

To ensure best electrical conductivity, wrap bare copper wire around the outer connector and ground that to the chassis. You need to sand down the chassis painted part to a shiny bare metal. Attach with hose clamps on both ends.

I suspect somehow there is potential build up at the connector, the earpiece headphone is simply a two-wire voltage signal. A source voltage and a return path (like + and - on a battery).

To illustrate what's happening now, normally the - side is at 0V potential, and the plus side is like 1V, so the difference is a 1.0V...
but if the - side develops a potential due to some leakage or induction, it maybe at 0.6V. In this case, the output signal is still 1V on the + side, so 1 - 0.6 = 0.4V.

Your earpiece will see 0.4V only (hence the lowered volume). Hooking up a ground strap to that connector to tie it to the frame potential, will take that 0.4V back to 0V so you will have a full 1.0V reference.

This is just an illustration of concept, I don't have the full specifications and wiring schematics of the setup.

 

We determined that the transmitter and receiver "radio links" were functioning correctly. Another option you can consider is to add an external headphone amplifier to sit between the earpiece and the signal wires. This will boost the signal to however loud you want it to using a separate DC powered source.

 

Race this sunday?? When and where? Is it only for the pros?

 

Ontario CRDA-GTB class

The Ontario GT Sprints represent a true open GT interseries. Cars are scored in GT1, GTA, GTB, GTC and GTD brackets according to lap time, and run three twenty-minute races per weekend. As in international endurance racing, all four classes run simultaneously while being scored for their respective classes. The sprints accomodate a wide variety of cars based on series-produced models, including tubeframed 'silhouette' cars and stockers. Tire choices and modifications are open, reducing cost for several 'run-what-you-brung' competitors, and drivers also share cars to split costs, partiularly in the open endurance races which dot the calendar.

The one on Sudnay is British Empire Motor Club INC. 54th Annual Indian Summer Trophy Race.

Race Events

Race weekend schedule

But if its raining then...#$%@$^

 

cool! U going to watch?

 

I am part of the race team so I will be there...if its not raining.

you can check out the videos of the 1Sept racining @

AB Racing Youtube Channel

AB Racing Events

 

Cool man thx! Have fun at the track!

 

Hey, guess what the weather forecast is for this weekend.................RAIN!!!!!!!!!!!