I am offering 8 line output preamplifier with output transformer based on Germanium transistors (2xAC181k, 2x AC180k) and one silicon BC109 made by Polish Klangfilm company back in 1971. 300 ohm input, 6V maximum output voltage, very good quality and sound, coming with schematic, 8 pieces, raw modules, 123 EUR each (unless you are overseas or having EU VAT number, then price is 100 EUR each). They have a similar size as Siemens V276. PM when interested.