This board is a 85mm x 46mm turretboard built on 2.0mm thick Fibre Glass sheet in very deep dark brown, almost black. It is fitted with sturdy turret lugs standing 8.4mm above the board, fully wired and tested and ready to use.
This board is fitted with 2 x 22uF capacitors @ 450V and 2 x 22uF capacitors rated at 500V, with a bleed resistor fitted so the full HT is safely drained back to zero a while after the amp is switched off. Referring to the drawing above, the bottom row of pins (Capacitor positive ends) are wired from left to right as follows; A is wired to the feed point for the push/pull output transformer windings, which is the centre of the primary winding and this supply provides the anodes of the output valves. Also feeds the power choke. B filters the supply for the screens of the output valves. C filters the supply for the Phase Inverter (and hence the preamp stages). The upper row of pins (capacitor negative ends) are both ground points and for best hum reduction should be wired separately via two short thick wires to the common chassis star ground point. Note that due to demand, there is now a waiting list for these Turret boards, so please do contact us as the earliest opportunity to allocate a production time for your board. Other Turret Boards built and fitted with components, including your own custom designs, also available - contact us for details and a quotation.
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