U18/20 Marconi Marconiphone flat jagged top black plate full getter holy grail FW4/800 CV31
Marconiphone U18/20 £ 500 pair.
Marconiphone U18/20 £ 900 quartet.
Description
A set of four pieces rare Marconiphone U18/20.
The patterns you see here have flat jagged top mica with black plate.
Tall version with clean top.
Narrow plates make these valves a winner especially a set of four identical pieces.
The reservoir capacitance is 16uF hence suitable for all audio applications.
All four U18/20 tested with full emission and perfect working order.
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