Tosten Grip PTT

[JRV]

I am using Tosten grips.

The Grip wiring diagram has a wire from the trigger & each of the other buttons, and a common wire.

The common wire will need to go to go to ground (Earth) for use with the other buttons.

We understood for the ptt it is best to run the 2 wires from the mic jack, straight to either side of the ptt switch, NOT to go to the aircraft ground.

To clarify we run the wire from the tip of the mic jack to one side of grip trigger switch, - No problem we can do that, (Yellow wire on Tosten grip wiring diagram)
but we then want to run the wire from the MIC jack barrel to the other side of the PTT sw ( White wire - Common) . This common wire will however also have to go to ground to provide functionality on the other switches on the grip.

Is this ok?


I am using a common earthing block on the cockpit side of the firewall.

Guidance anyone please?

Thanks

[BobTurner]

Just run the tip PTT wire to the trigger switch; and the grip common wire to your ground block. There is no reason for the PTT ground current to go thru the mike lo or ground wire, this is a d.c. signal so no need for shielding.

[N804RV]

Agree with Bob. Stick with the manufacturer's wiring diagram.

The PTT circuit is a dc voltage that places the transceiver into "transmit" mode. It is not an audio circuit.

[Mike S]

Three years of no problems with the Tostens wired as per instructions.

[JRV]

Thank you.

That's what I will do then.

[1bigdog]

I'm reserecting this onld thread because the PDA360EX diagram clearly wants to keep the PTT circuit isolated. And of course the MIC jack itself is isolated.

So I have a 2 part question.

1. Experience of those with PDA360EX using the Tosten CS-8 PTT trigger switch (I'm being specific because of the common lead).

2. Anyone cracked open the Tosten grip to bring out both leads from the trigger switch. Tosten appears to be unresponsive and doesn't provide any direct contact info. I have asked on their web question submission.

Thanks for the info

[BobTurner]

I think you?re concerned over nothing. The manual shows wiring for a mike jack which is also wired for a PTT switch. Most of us wouldn?t even wire the PTT line to the mike jack. Instead, wire the PTT line (pin 34 for the pilot) directly to the grip?s trigger switch. Connect the grip?s common ground wire to any convenient ground, or, slightly better, to your single point ground buss. This is a dc circuit and shouldn?t need an isolated ground. If in doubt, call PS and confirm.

[1bigdog]

Originally Posted by BobTurner

I think you?re concerned over nothing. The manual shows wiring for a mike jack which is also wired for a PTT switch. Most of us wouldn?t even wire the PTT line to the mike jack. Instead, wire the PTT line (pin 34 for the pilot) directly to the grip?s trigger switch. Connect the grip?s common ground wire to any convenient ground, or, slightly better, to your single point ground buss. This is a dc circuit and shouldn?t need an isolated ground. If in doubt, call PS and confirm.

Hi Bob. I was in touch with PSE. Their take is that they just don't know if it will work properly because there will be a potential diff. It's not meant to be grounded. But to further that, the harness was made by ACS and they made it correctly, as per the PSE diagram which takes the 2 leads off the jack.

You are right, I may be worying about nothing but I prefer to do things as a vendor states if I can.

Thanks

[RVDan]

I faced this question and just so you know, on request, Tosten will wire the extra ground for the PTT. If you make the request when you order the grips, I don?t think there was even an extra charge.
PS engineering definitely doesn?t want the PTT to be grounded for EMI reasons, but as some have said it may work. Why not wire the Audio Panel the way the manufacturer wanted it?

[1bigdog]

Originally Posted by RVDan

I faced this question and just so you know, on request, Tosten will wire the extra ground for the PTT. If you make the request when you order the grips, I don?t think there was even an extra charge.
PS engineering definitely doesn?t want the PTT to be grounded for EMI reasons, but as some have said it may work. Why not wire the Audio Panel the way the manufacturer wanted it?

I've had the 2 grips for a while and it was a question that had never occured to me at the time. It's the only thing that really asks for a separate lead.
So it may work, but ...
Has anyone cracked open a Tosten grip to add the lead? As yet Tosten is unresponsive.

Thanks.