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Where is it from?
- A Manufacturer Blackburn, United Kingdom
Electronic Valve - Mullard, Pentode, Type EF37A, 1958 Reg. No: ST 028071
- The EF37A was a low noise version of the EF36. It was intended for use in low level audio amplifying stages (A. F. amplifier).
This valve is branded 'Miniwatt' so presumably it was marketed under the Philips 'Miniwatt' brand. It has a date code (EP2/B8L) which indicates that it was made in Mullard's Blackburn works in December 1958
Manufactured by: Mullard, Blackburn, England.
Sharp cut-off; 6,3 Volt indirectly heated cathode
- Tubular glass bulb with top cap and octal base with seven pins present. Bulb is coated with red metallic screening paint
- Acquisition Information:
- Unknown from Unknown, 1971
|Dimensions:||97 mm (Length), 32 mm (Diameter)|
|Tagged with:||thermionic electron valves|
|Themes this item is part of:||Engineering Collection, Information & Communication Collection|
|Secondary Classification:||Vacuum Technology|
|Inscriptions:||Bulb: EF37A/MADE IN/GREAT BRITAIN
|Manufacturer:||Mullard Radio Valve Co., Blackburn, Lancashire, England, Great Britain, 1958|