Vintage Grundig Tube Stereo FM Multiplex MPX Decoder Adapter $24.99 USD Sold on: 2014-May-15 Marketplace: eBay 1 Treasure 0 Trash 100% Detail: FM decoder adapter used on Grundig tube receivers. I don't know all of the applications but it has a 9 pin plug to connect to the receiver (see picture). The adapter was working with my Grundig SO 240... More Relevance Historical Items
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