Manufacturer and factory: Philips Sittard
Code: Zf1 X8D
Year of production: 1958
Conditions: NIB new in box
Rating : 1
Original package : yes
Another sample print on tubes not producer
The EF40 is a voltage amplifying pentode, primarily intended for use in high gain RC coupled AF voltage amplifier stages.
PRICE FOR SINGLE TUBE, TWO AVAILABLE
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