J. H. Brierley (Gramophones & Recordings) Ltd. 
1, St Pauls Avenue, Lytham St Annes, Lancashire. (1944)
46 Tithebarn Street, Liverpool (1945 - 1951)
Kirby Trading Estate, Liverpool (1951)

John Brierley was a manufacturer of ribbon and armature pick-ups, filters, amplifiers, and pre-amplifiers from 1946.

Earlier he wrote several articles on audio gramophone pickups, transformers, and filter design which were published in Wireless World in the early 1940s as below:-

Making a Moving Coil Pick-up,  July 1942, Page 154.

Gramophone Needle Points, Blunt or Sharp, February 1943, Page 36.

Design and Construction of a Low-pass Filter and Feeder Unit,  April 1943, Page 100.

Pickup Coupling Transformer,  July 1943, Page 212.

A list of their manufactured products was listed in Wireless World Jun 1947 as below;

GRAMOPHONE AND SOUND EQUIPMENT

JH. Brierley, Ltd., announced a complete range of new equipment: -

• Ribbon Pickup, £5/10 plus £1/7/6 tax.
• Special Mumetal screened transformer for ribbon pickup, £2.
• Armature pickup, 5gns plus £1/6/9 tax.
• Special Mumetal screened transformer for armature pickup, £1.
• Combined coupling transformer and domestic tone compensation unit for armature pickup, £1/7/6.
• Latest JB /12 /Q amplifier for use with the above pickups with many special features. £48.
• Pre-amplifier, standard type, £9.
• Filters, JB /LPF 1 and 2 with cut-off frequencies of 7,500 c/s and 13,000 c/s respectively, matched for a terminating impedance of 24,000 ohms, £3/10 each.

Full details of any or all the above items will be supplied on receipt of 3d in stamps. [1]

[1] Wireless World Jun 1947, Ad 43