Identifying a System A modulator
On the Bring and buy at Harpenden I bought a die cast box with some sockets on. When opening it up this weekend I found it contained a well built System A modulator based on 2 MC1496 chips with Crystals for 41.5 and 45Mhz all on a single board. I have not seen one of these before can anyone help with the origin of this and possibly point me to a manual or other info.
Many thanks
Chris
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