SANWA (Airtronics) - Radio Gear
Japanese radio gear marketed under the 'Airtronics' name in the USA.
1975
Adverts - Sanwa 6 - Radio review Sep 1975
1976
1978
Advert - Sanwa Custom - Radio review Oct 1978
1979
1980
Sanwa Custom FM 6 - Radio review Jan 1980.
Note 'Black' version of the custom has helicopter mixing function i.e. collective / tail rotor mixing and collective / throttle mixing with hold facility; general description here - Hovering About
1982
1983