Senso actually says: TBA470 see: TDA470/TDA0470 So he doesn't differentiate between TDA470 and TDA0470. > According to http://www.vintageplanet.nl/index.html > TBA470 is equivalent to TDA0470. > Some kind of transistor array. > > I expect (though I can't prove it) that TDA470 is somethng very different.