[Collins] Differences between 75A2 and 75A3

[Gareth]

My 75A2 is an early model. It had a slightly different tube line up and
sported crystal filtering. At the present time, the literature I had that
states this eludes me. Also, the front upside down triangular escutcheon is
metal. My 75A3's escutcheon is the bakelite type material. And my 75A3 has
the mechanical filter with the metal stub A/B switch behind the BFO pitch
knob. Despite the differences, they are both GREAT receivers!

Gareth KH6RH