Yoke mounted PTT

Yoke mounted PTT

<HTML>I want to mount a push to talk on my yoke.  I have seen yokes with PTT's mounted in them but I'm not sure of a few things:

1. Is there an STC or do I need a 337?

2. Are there someplace I can send my yoke or is this something I can do?  I was thinking that I would remove the yoke and take it to a machind shop for the drilling.

3. Is there some specific switch to use? The switches look to me like they are screwed into the top of the yoke.  If so I assume the switch base will need to be threaded and the hole in the yoke will also need to be threaded.

Any help will be appreciated

Thanks,

Dan</HTML>

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Re: Yoke mounted PTT

<HTML>A lot depends on the type of yoke. Generally, Cessna magnesium (aluminum) yokes can be drilled with a long, small diameter drill bit. The small push to talk micro switches are usually just pressed into the yoke, held with a small dab of silicone. As far as I am aware, the larger hole for the micro switch is not threaded. I recently purchased Avion yokes (wish I hadn't), which are drilled for up to five switches. A form 337 will most likely be needed; you may have to obtain a field approval for the modification of the yoke. You might want to check with a good radio shop. This modification is very common where I live.</HTML>

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Re: Yoke mounted PTT

<HTML>Dan,
I installed my PTTs in the yoke...Its not that big of a deal,you MUST however be sure you drill down the center of the yoke.I used a 1/4 inch 12inch long bit,and drilled very slowly.Once the hole was completely through,I drilled the upper part(Where the switch will go)out to about 3/8 wide,and about 1/2 inch deep.The switch youll need is a normally open spring type,and if youll email me direct,Ill see if I can find you one,and send it to you......Tailwinds.</HTML>

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Re: Yoke mounted PTT

<HTML>Alan: After you drilled the hole down the grip for the switch, did you cross drill into the control shaft? I have been considering drilling about a 1/32 hole and using a single insulated shielded wire and run it out the back of the control shaft behind the panel. Bob</HTML>

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Re: Yoke mounted PTT

<HTML>Not sure what aircraft you have, but many have the control shafted attached to a universal joint at the firewall end. If so, you will need to drill a second hole in the shaft for the wire to exit, because of the universal joint at the end of the shaft. This makes for a 'clean' cockpit (no dangling wires). Keep in mind, you will need to reinstall the yoke and shaft BEFORE you feed the wire through, as the shaft cannot be passed through the instrument panel bushing with the wire protruding from it. Once installed and wired, you cannot simply remove the control yoke and shaft; the wire must first be disconnected and withdrawn through the shaft.</HTML>

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Re: Yoke mounted PTT

<HTML>Bob,
I have two coiled cords going to my switches(one on each yoke).Basically,on the 150,theres a small piece of plastic on the bottom of the panel just below the yoke lock.I drilled a small hole,and put a grommet in it,ran the wire out ot it,checked for proper length,and put a ty wrap right behind where the control rod,and yoke attach.
The connection between the cabin wiring(PTT)and coiled cord is bedind that small piece of plastic(Held on with 4 screws).I have regular 22 guage wire coming from the base of the switch to where it comes out the bottom of the yoke,I then drilled two VERY small holes in the back of the yoke,and used plastic(Black) wire clips to dress the wires from the bottom of the yoke to the center rear...This is where I made the final connection.
  after the switch is connected to the two(pigtail wires) you can check it for fit,and carefully drill accordingly,after youre finished with the fitting process,and have the switch like you want it,Id suggest backfilling the holes drilled with Dow Corning 3145.This is a grey RTV(we use it in our avionics shop) and let it sit for about 8 hours before doing the wiring(Pigtail to panel).
even though 3145 is grey,and your yoke is likely black,if youre good,youll never see the 3145.......
I have seen people run theirs through the control rod,but I personally didnt want to go to all that trouble,and I really like to be able to see just what kind of shape this line is in anyway...you know..piece of mind.</HTML>

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Re: Yoke mounted PTT

<HTML>If you check with your local FSDO I think you're going to find that they'll condemn drilling your yoke.  I believe you'll be destroying a perfectly good yoke in their view.  In order to get them to approve this, you'll have to virtually destroy the yoke performing pull-tests etc.  The only yokes they'll approve are already certified with the holes for switches already manufactured.
Unless you're willing to run the risk of having  your airplane grounded for unauthorized modification, then I'd contact them first.  (Not to mention any safety associated hazards, in case they're right.)</HTML>

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Re: Yoke mounted PTT

<HTML>Re: Alan and Gorge suggestions.
   Drats. When I redid my panel and avionics the IA said best to just attach PTT to yoke with tape or adhesive (he said not to use screws) and I have something like Alan has now, but the wire dangles under the panel. I think I'll clean it up a bit like Alan has suggested with a the wire going thru a gromet just below the control shaft.
    Empire:
    What is the problem with Avion control yokes? I thought about them, but I kinda like the original ones in my old plane. I though long and hard about changing the panel, but it finally came to accomodation of new avionics and gyros and is thus safer, too.</HTML>

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Re: Yoke mounted PTT

<HTML>FIrst thanks for all the good information. And I will contact the FSDO.   Is there a specific procedure for this or do I just call?

Second, George, are there Cessna factory yokes with the PTT installed that I might aquire at a salvage yard?

  I don't remember exactly what page (it is easy to find) but there is a large ad in AOPA's monthly magazine with a picture of what appears to be a  female pilot sitting in the left seat of a plane.The yoke and panel look very much like mine, 1969 C172K.  The yoke in front of her appears to be a factory yoke,there is a  PTT mounted in this yoke.</HTML>

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Re: Yoke mounted PTT

<HTML>Hi Empire,
Along with Bob, what is it that you do not like about the Avion yokes? I am considering getting them, but it would be nice to have a user's opinion of the product.
Thanks for your input.
Glenn</HTML>

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Re: Yoke mounted PTT

<HTML>I too am looking to move away from the velcro attached PTT on the yokes of my C172N.  One option that I have thinking about is the leather yoke covers from  www.warrengregoire.com/aviation-leather … covers.htm


The PTT is apparently embedded in the cover with the wiring also enclosed.  Has anyone tried them, and if so, would you recommend them?

Thanks.</HTML>

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Re: Yoke mounted PTT

<HTML>Glenn, I installed the Avion control wheels and think they're great.  They're build like the proverbial brick outhouse and come with a PTT switch.  They can accommodate up to four more switches, for a total of five on each wheel (three drilled holes on one horn and two on the other, with plastic plugs for the holes you don't use).  They're STC'd for most Cessna models.

The major downside is the cost (currently $785 per pair!!).  If you want to see what they look like with the Avion panel in a '63 172, take a peek at photo number 5 in the Photo Gallery on this site (they're hi res pictures, so they take a few seconds to load if you have a dial-up connection).</HTML>

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Re: Yoke mounted PTT

<HTML>The absolute worst component of the Avion yokes is the service. It literally took months and months for me to receive them after ordering. Countless phone calls
brought the same reply; 'should be able to ship in a few days, waiting for one missing bracket, etc.' This went on for week after week. If they have them on the shelf NOW, you MAY get them in a reasonable time. The yokes themselves are fine, but extremely heavy when compared to Cessna yokes (probably aluminum vs magnesium). Used Cessna yokes should be readily available at bone yards. As for drilling, it's done all the time in Anchorage area. Contact one of the avionics shops for info. Perhaps you can gain some info about field approvals from Anchorage FSDO. Doing it again, I'd most certainly try to source some good used yokes first.</HTML>

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Re: Yoke mounted PTT

<HTML> Theres a bone yard in Clinton Ark...(2A2) www.arkansasairframe.com,The person you need to direct any inquiries to is Timothy.Ive purchased quite a few parts for our 150 from him,hes very reasonable,and I know for a fact that he does have a fair collection of yokes.</HTML>

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Re: Yoke mounted PTT

<HTML>I intalled a Warren Gregoire yoke cover/wrap with built-in PTT about a year ago, and so far I've had no problems with it. You just have to follow the simple directions carefully to get it installed correctly.</HTML>

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Re: Yoke mounted PTT

<HTML>If you can get the hole in the yoke and the switch mounted, just drill a hole approx 1" to 2" below the  control shaft and use a mike plug on the end of the cable with the corresponding jack mounted in the hole on the panel. Using a coiled cord and you can also have the ability to remove the yoke and cable if necessary. Just be sure that there is nothing behind the jack that will restrict the control shaft when pulled all the way back and not short any connections on the jack. Using the standard sized jacks will not pull out to easily and that the cod have also some slack when pulled fully back. This way should the coiled cord develop a break that is all that would have to be replaced and it is easily removed.

Bill</HTML>

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Re: Yoke mounted PTT

<HTML>Hi,  Wag-Aero sells some slip on yoke covers that have a ptt switch built in. You just apply some lube and slip 'em on.  You order them based on which grip you want the switch on.  We ordered 2 sets(one left and one right) and that way each yoke has a ptt on it.  They come with curly wire cord that can be loosely coiled around the control shaft then run through/under the panel, to your intercom, etc.
They cost around $50.00 a set. Been very happy with them.</HTML>

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Re: Yoke mounted PTT

I purchased warren gregoire yoke mount push to talk ptt switch and I am completely dissatisfied. The quality of materials and construction looks like it was made in someone's basement. I was shocked to discover that the internal wiring was secured by simple hand-twisting of two wires together; no soldered joint or slip-on connectors. Naturally all four wires separated soon after I began handling the unit. The coiled wire is not shielded, has two exposed cut-off ends, and is 'radio shack' quality. The so-called slip-over grips don't fit very well and despite what the instructions say about it being easy, it is definitely NOT easy! I had to apply an exhausting amount of effort to 'slip' a grip over my yoke handles. To sum up, poorly constructed and way over-priced. Lastly I was charged $18 shipping when the shipping label indicated a cost of $7.00.

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Re: Yoke mounted PTT

I purchased the warren gregoire/WAG AERO yoke mount push to talk ptt switch and I am totally dissatisfied. The quality of materials and construction looks like it was made in someone's basement. I was shocked to discover that the internal wiring was secured by simple hand-twisting of two wires together; no soldered joint or slip-on connectors. Naturally all four wires separated soon after I began handling the unit. The coiled wire is not shielded, has two exposed cut-off ends, and is 'radio shack' quality. The so-called slip-over grips don't fit very well and despite what the instructions say about it being easy, it is definitely NOT easy! I had to apply an exhausting amount of effort to 'slip' a grip over my yoke handles. To sum up, poorly constructed and way over-priced. Lastly I was charged $18 shipping when the shipping label indicated a cost of $7.00.

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Re: Yoke mounted PTT

Wish I had read your post several days ago.  Just ordered and received a set of the warren gregoire PTT slip ons for my 150. Yuck!  Crappy construction (had to resolder the wires and re-heatshrink) and the instructions do not include a wiring schematic, just instructions to lube them up and slip them on.  Hah!  My plane has a single headphone jack and Mic jack, how do I wire the thing for both pilot and co-pilot PTT?  My mechanic is going to love me...$$$.

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