Hi bob,
Several years ago I converted my GNS-530 to a GNS-530W. As I recall I sent the 530 to Garmin while I had my radio guy replace my antenna and cable. When it all came back a few weeks later the difference was astounding. Not only was WAAS there but the unit changed from updating once per second to five times per second. While I’m thinking about it, don’t forget to update your subscription with Jeppessen. Your old GNS subscription(s) won’t work with the WAAS unit(s). I suspect that while you’re waiting on the WAAS upgrade, your radio guy will not only update the antenna/coax cable but also run two RS232 data wires from your 530W/430W to the upgraded (ES model) transponder. What ES, or extended squitter does is allow your transponder to transmit a short burst of data from your GPS back on the secondary radar return. Included in the short burst is your lan/long, and speed along with your mode C altitude and squawk code. When the upgrade is done, don’t forget to test your ADS-B out datalink with the FAA. If you check earlier in these posts you’ll find instructions on how to do that from another PFA member.
My transponder upgrade for ADS-B out comes in March. We’ll share experiences then!
Best,
Scott Sherer
N344TB