RE: SD-10G & RX700 Range Check
Nathan King and I fly at what must be the most heavily Airtronics-centric flying club in the midwest. We have 25 or 30 members flying various SD-series radios, RDS8000s, and even a few folks flying Airtronics 72Mhz gear. We're Airtronics fans, which is what makes this current issue so frustrating.
What we're seeing are SD-10g transmitters failing range tests with various FHSS-1 receivers. We can rebind the exact same receiver in the exact same plane with the exact same setup and environmental conditions and batteries to an RDS8000, and the radio setup range tests perfectly.
I saw the same thing in a Great Planes Escapade .60 ARF a couple of weeks ago. Harry Perkons was using an RX500 receiver, and his SD-10g failed the range test while my RDS8000 passed easily. Nathan's plane failed the range test with two different SD-10g transmitters paired to an RX700 and a 92824, then passed the same range tests using two different RDS8000s.
When re-testing Nathan's 2M Icepoint pattern plane, one of the pilots noticed that the receiver LED was going dark for a split second periodically. The LED should be solid blue, but it would go dark for a split second quite frequently when range testing either of the SD-10g transmitters. During successful range tests with one of the RDS8000 transmitters, the light would stay solid blue much more regularly, only darkening once in a great while.
This range test failure problem only seems to affect the SD-10g, it is very consistent, and it is easily reproduced. The consistency with which rebinding to an RDS8000 eliminates the problem seems to rule out batteries, installation, environment, or receiver failure. We haven't had the opportunity to retest a range check failure with an SD-5g or SD-6g yet. By all appearances, we have a problem with our SD-10g transmitters.