ID:
1539
Maker's Name:
Philips
Where made:
Japan
Dimensions:
1.7 × 1.7 × 6.5 cm
This was used as a full-wave rectifier valve in power supplies in domestic radio receivers.
Book reference:
RCA Receiving Tube Manual RC-30, 1975
1539 - Valve Double Diode 6X4/EZ90
