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252:. Founded in 1923 to provide tuning capacitors for the growing home construction market, by the Fillmore family in Lewisham, England, (there never was a pair of people involved who were Jackson brothers!) the firm went on to manufacture a huge variety of the, mostly air-spaced, two or three gang, variable capacitors, that were at the heart of all radio receivers until the invention of the
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Production of
Capacitor kits began in a shop in Soho for home assembly. After a short while it was realised that it would be better to sell assembled components but through 1923/24 business was erratic. In 1932 the firm was converted to a Private Limited Company and moved to a site near London Bridge
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were supplied. The range then included direct drive and slow motion capacitors that incorporated epicyclic ball-bearing reduction units. The ‘Dilecon’ solid dielectric variable tuning capacitors were widely used for by constructors of
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The money for the enterprise came largely from
Grandfather Fillmore, who wanted to call the company ‘John Bull and Company’, but other relatives opposed this, and it was settled that Jackson Brothers sounded suitably British.
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were major suppliers of capacitors and tuning components for the
Services but in 1941 the Jackson Bros factory was destroyed in a fire-bombing raid. The firm then moved to
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made home sales less attractive and business was difficult for a few years, until a move to sell overseas resulted in sales agents being appointed in the
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and
Crystal set receivers, while air-spaced tuning capacitors which offered greater stability and accuracy were usually used in
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radio equipment became cheaply available, and the relationship with
Wingrove & Rogers reverted to normal competition.
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designs, and the frequency-synthesizer front ends that are now found in most
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until 1992. After the War sales of new radio parts fell as huge amounts of
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