296 to GTX327 and SL40
 

Looking for a reference on how to wire the Garmin 296 so it talks to the 327 and SL40

Thanks

Hi Neil.

Follow this link to download the schematic for my RV-9A. After installing the schematic software and opening the schematic, check out pages 'GPS' and 'RADIO' for the wiring details.

In order to open the schematic, you'll need to download and install ExpressPCB per the instructions on the page.

http://vx-aviation.com/page_3.html

By the way, even though I've connected the GPSMap 296 to the GTX327, the transponder does not recognize any GPS information. I'm hoping that Garmin will update the 296 software at some point to allow this.

If they do this, then I can get auto-standby from the 327 when groundspeed is zero, plus lat/lon display.

Vern

Thanks Vern. I thought I read on the Garmin site that the 296 GS should get the 327 to go from SDBY to ALT and back, but I could have been thinking of something else.

Unless my information is out of date, I don't think the GTX 327 or GTX 330 understand the NMEA 0183 serial format, so I don't think there's much use in connecting the serial output of a Garmin handheld to either of these transponders. (The 396 and 496 can take serial traffic data from a GTX 330, but that's a different wire).

mcb

Matt, I think you are right, I don't know where I got the idea.. wishful thinking probably. Now I'm wondering how useful it is to be connected to the SL40...

Definitely connect it to the SL-40. The autotune of frequencies is a very handy feature. It saves fumbling with flight guides and charts.

Another useful function is that You can set up a primary and two standby frequencies: primary and secondary on the SL-40 and one on the GPS. Pushing a button on the GPS then sends it to the SL-40.

I've found this useful in formation: one tactical frequency, another for local air-to-air traffic and the third (set) for the destination airport.

Also, sometimes we fly in formation between airports that are about 7 miles apart. It's nice to have quick frequency changes!

Vern

Thanks, that's what I was wondering, worth messing around with the panel for.

Vern I not finding that schematic, maybe I need more coffee.

Here's a summary of the Instructions to download the schematic for my RV-9A electrical system design:

1. First, download ExpressPCB which installs two programs: ExpressSCH and ExpressPCB. ExpressSCH is the one you want to use.

2. Download my electrical system schematic

3. To open the schematic, double-click the file, or if you have Microsoft Schedule on your computer, you will need to open ExpressSCH first, then open the file from within the program.

4. There's also a library of components available, however the schematic contains most of them already that can be copied and pasted. You'll need to install the symbols in the right place on your computer (read the ExpressPCB documentation).

Vern

Ok, now that I have enough caffeine I can notice the tabs at the bottom of the page in Express....

Thanks