[TR] Triumph Bendix Radio

[John Finlayson]

I have a 1967 Triumph radio, manufactured by Bendix. The model number is
7BTRX. On the left side of the case near the rear is a polarity switch. Does
anyone know which way the switch should be set for positive ground, up or
down? There is no indication on the radio which way to set it and I don't want
to apply power till I know which way to set it.

Any help would be greatly appreciated.

Thanks
John Finlayson