3rd harmonic

G'day, circled for a long time on these pages. Then got round to creating an account, couldn't resist commenting on something audio related (as my professional area of expertise). But thought i should do a legitimate post. I've done most of my flying at YADG (Aldinga) with Adelaide biplanes, in the Sporty's, Cubcrafters cub and Aeronca Champ (both tailwheel) Very much enjoy the tail wheel flying as it has helped improved my skills considerably... Although did my first bit of flying at Camden in Sydney through Cadets in the early 90's in a Tomahawk. For family reasons (kids), flying has been on/off again for the last 6-7 years, actually most off rather then on - sigh! Anyway, against what might be considered sensible i brought the written-off wreck of a Morgan Sierra 19-5645. It was previously built and owned by someone else on this page and i brought it off a 3rd party in Melbourne after it had been sitting in a storage unit for a while. The intention has been to restore it to flying condition, with some improvements along the way. But for the same reason (Kids - i mean they are wonderful, but why would you??), plus house reno's, full time work ect the project has been inching forward at a pace that might be considered less than glacial. Still i have been getting somewhere and i do appreciate there is considerable collective knowledge/wisdom from the members who frequent these pages - including the resident know-it-all (i mean that in the nicest possible way) Nev People sometime refer to me as a know-it-all, so it takes one to know one. The jokes and banter is good value too!! I did meet Ray T, who is at Camden coincidentally who was really good talk to, I might post something up in the Morgan section in due course... Cheers Andrew

The reference to Analogue Gnd or more accurately signal Gnd in this context, is different /separate to the Chassis/negative supply Gnd Often on audio gear that has both Digital and Analogue interfaces there are separate grounds for those respective interfaces, especially if the signals are unbalance (RCA) which they are in this case. Internally the signal ground will (hopefully) be free of any contamination from currents drawn by the RF output stage or digital parts of the radio. Yes, i'd say it would be a reference for the headphone outputs - these would normally expect to see a 32ohm load minimum, an 8Ohm speaker may overload the output - the specs in the manual may have some limitation with regard to this...