Ummmm, The person who had the 12 inch diameter 16 foot tall project I mentioned above that went in ballistic, built a new one with new Adept 22's. Thought he could get away with 30 inches of "separation". I did some serious arm twisting for him to test the setup with bare ematches. By the way he initially responded, I thought he was going to ignore the recommendation but I misjudged him. He tested and found that after a short period of time the altimeters locked up, shutdown and failed to function. Got different electronics for the flight.
I hope it always works for you Chuck but myself, I'd be nervous unless the electronics were shielded from the Garmin like in Konshaks article or pass an extended test. If you have the dog tracker in the nosecone that might be all you need. If it can flop around on the shockcord I'd still be nervous.
I will make mention that the EggTimer deployment altimeter uses opto-isolation of the deloyment channels and likely would be a good match for high powered trackers. The maker has the device that has the deployment computer and the tracker on the same board, the TRS, that works fine.
I've been burned twice in the past before I wised-up. Test first then fly. Kurt
