Vox AC30 website sitemap (2023)
Chronology / Timeline - in progress.
Links (in progress) - begun 24th Oct. 2021.
Jennings Musical Instruments Limited
Companies preceding Jennings Musical Industries - 1951-1956.
INDEX PAGE for Jennings Organs - 1953-1967. Over forty pages at present (January 2023).
Trademarks - 1951-1963.
Early amplifiers
Early Jennings Amplifiers - 1952-1957.
The Vox AC2, AC4, and Domino range
The Vox AC2 (in progress) - late 1960-1962.
Early Vox AC4s - 1962-1963.
Notes on the circuit - early 1960s.
Early Vox AC4s - 1962-1963.
The Vox Domino range - introduction.
The Vox AC10
Derek Underdown's Ten Watt Amplifier designs from Univox to AC10 - Glen Lambert.
Overview of versions of the Vox AC10 - Late 1957 to early 1962.
The Vox AC10 Amplifier no. 2 - 1960
The Vox Vibrato Control Unit - 1960
An early split-front AC10 early 1961
Vox AC10 Twins, part 1 - late 1961 to 1964
Vox AC10 Twins, part 2 - 1964 to 1965
Vox AC10 Twins, part 1 - 1965 to 1967
Elac speakers - 1960 to 1967
The Vox AC15
The Vox AC1/15 - documents, late 1957-1959.
The Vox AC1/15 (first circuit) - serial numbers in the 3000s, 1957-1959.
The Vox AC/15 (second circuit) - serial numbers c. 3850- low 4000s, early 1960 to autumn 1960.
The Vox AC/15 and AC/10 amplifier no.2 circuit - OS/005 - by Glen Lambert.
The Vox AC15 (third circuit) - serial numbers c. 4060 - 4500, mid 1960 to late 1961.
The Vox AC15 - serial numbers c. 4500 - 5300.
The Vox AC15 - serial numbers c. 5300-5600, and the new sequence for Twins, 1000-1600.
Vox AC15 prices - 1957 - 1964.
Thomas Organ, USA - late 1964 to 1968.
Thomas Organ, USA - - 1969.
The AC2/30 and AC/30 (single speaker): 1957 - 1960
The single speaker AC2/30 - late 1957 to early 1958.
The single speaker AC/30 - summer 1959 to mid 1960 - serial numbers from 4000 to around 4150.
Vox Vibravox - late 1957 to mid 1960.
The Jennings vibrato circuit, 1957-1960 - Glen Lambert.
The Jennings / Meazzi Echo unit - 1959 to mid 1961.
AC30 Twins, black panel, mid 1960 to late 1961
The AC30 Twin: creation stories - 1960.
AC30s with TV Fronts - 1960 and 1961.
AC30/4s - black panels - serial numbers in the 4000s - late 1960 to late autumn 1961.
AC30/6s with black panels - serial numbers in the 4000s - late 1960 to late 1961.
A circuit change dated February 1961.
A quirk in AC30 chassis made by Westrex - late 1961 / early 1962.
WIMA capacitors - Tropydur, Tropyfol and Durolit.
Hunts electrolytic capacitors - 1960-1964.
Vox AC30 Operating Guide, version 1 - 1961-1964.
Vox AC30 brochure - Spring 1961.
Westrex factory inspection tags - 1961 to 1963.
Links to pages on circuit diagrams, speakers, other components, and so on, can be found lower down this page.
The early contractors
Chassis (metalwork) fabricated by Burnham Engineering. 1960 and 1961
Chassis assembled by Westrex. from Spring 1961
Buying your AC30 in the 1960s
Hire Purchase in the 1960s - buying by instalment.
AC30 Twins, copper panel - late 1961 to 1964
Beige (fawn, tan) AC30s - serial numbers in the 5000s - late 1961 to 1962.
Serial number 5002N, details - early 1962.
Beige (fawn, tan) AC30s - serial numbers in the 6000s - late 1962 to 1963.
Beige (fawn, tan) AC30s - serial numbers unknown.
Black vinyl ("dimpled or "pebble") AC30s - serial numbers in the 7000s - 1963 (through to the last third of the year).
An AC30 chassis from early 1963 - details of components.
AC30 Twins - serial numbers in the 8000s - mid and later 1963.
AC30 Twins - serial numbers in the 9000s - Late 1963 to early 1964.
AC30 Twins, Expanded Frequency, and Super Twins - serial numbers in the 10000s - Early 1964.
AC30 Twins - serial numbers in the 11000s - Early to mid 1964.
The new Treble model - beginning with serial numbers in the 11000s.
Westrex factory inspection tags - 1961 to 1963.
Vox AC30 Top Boost
First reports of the "stereophonic" Top Boost circuit - Summer 1961
The Top Boost circuit - 1961-1964.
Top Boost assemblies, surviving examples - 1961-1964.
Chassis with copper panels and integrated Top Boost controls - late 1963 and 1964.
Vox AC30s with Top Boost controls on the control panel - 1964 (to be continued).
AC30 Twins, copper and grey panel - 1964
AC30 Twins - serial numbers in the 12000s - Early to mid 1964.
AC30 Twins - serial numbers in the 13000s - Mid 1964.
AC30 Twins - serial numbers in the 14000s - Mid 1964.
A grey panel chassis, serial number probably originally in the 14000s - Mid 1964.
AC30 Twins - serial numbers in the 15000s - Mid 1964.
AC30 Twins, grey panel - JMI late 1964 - 1968.
Vox AC30s in America, 1964-1966.
AC30 Twins - serial numbers in the 16000s - Later 1964.
AC30 Twins - serial numbers in the 17000s - Late 1964 / Early 1965.
AC30 Twins - serial numbers in the 18000s and 19000s - 1965.
AC30 Twins - serial numbers in the 20000s and 21000s - Late 1965 to 1967.
AC30 Twins - serial numbers in the 22000s and 23000s - 1967 and 1968.
AC30 Super Twins and Super Reverb Twins
Very early SUPER TWINS - Adam Faith, The Shadows, and Shane Fenton and the Fentones - late 1961 / early 1962
Early AC30 SUPER TWINS - serial numbers in the range 5000 to 10000 - late 1961 to 1964.
Geloso speaker connectors and sockets - 1961-1964.
AC30 SUPER TWINS in 1964 - serial numbers in the range 2500 to 3000 - 1964.
AC30 SUPER TWINS - serial numbers in the range 3000 to 6000 - Late 1964-1968.
AC30 Super Twins at Dartford Road, late summer, 1964 .
Early Super Reverb Twins - serial numbers from 6000s to new series 2500s - mid 1962 to early 1964.
Later Super Reverb Twins - new series serial numbers from 3000s to 5000s - 1965 to 1968.
Specials
Perspex AC30s for Trade Fairs - 1964-1965.
AC30s in coloured vinyl - 1963-1965.
The expanded AC30 - the AC30X - two fifteen inch speakers.
Public Address - the M.C.30 - 1964-1968.
The Vox Transonic and Lightweight 30
The Vox AC30 Super Transonic - 30 watts, space-age transistor combo - 1963 to 1964.
The Vox AC30 Lightweight - 30 watt transistor combo, Vox T60 amplifier chassis - 1964 to 1965.
AC30 Twins, grey panel - 1968/1969 to 1973 (VSEL and VSL).
AC30 Twins made in Italy - serial numbers in the 2000s, 5000s, 6000s, and 30000s - 1969 to 1972.
AC30 Twins made in the Birch Stolec factory - serial numbers in the 25000s, 26000s, and 1000s - 1971 to 1973.
"Dallas Musical Limited" and early "Dallas Arbiter" AC30s - 1974-1975.
AC30 Twins issued by Dallas Musical Limited and early Dallas Arbiter - serial numbers beginning "74" and "75" - 1974 to 1975.
Jennings Electronic Industries, 1970s
Tom Jennings and Dick Denney after JMI.
The Jennings AC40 - 1970-1973 (page on the Vox AC100 website).
The JEI V30 - 1973-1975 (page on the Vox AC100 website).
Circuit diagrams (schematics)
Early AC30 circuit diagrams - 1957-1960.
The AC30/6 (in progress) - 1960-1974.
Valves
MAIN INDEX PAGE FOR AC30 VALVES - 1960-1968.
AC30 Twins still with original valves - 1960-1968.
Brimar date codes - Burndept-made AC30s, late 1962 to mid 1964.
Mullard EF86 - (1960-1961).
Mullard ECC83 - (1959-1968).
Mullard ECC82 - (1960-1968).
Mullard EL84 - (1960-1968).
The GZ34 rectifier valve - (1959-1968).
Transformers
AC30 transformers (overview) - Haddon, Albion, and Woden, 1959-1968.
WODEN transformers - date codes and batches, 1962-1968
Speakers
Early Goodmans and Celestion speakers - 1957-1961.
Celestion blue speakers - 1960-1964.
Celestion RIC cones, 1960-1963 - 1960-1964.
Documents
Allan Billington, manager of the Jennings Shop 1950-1956..
Jennings - the early companies 1949-1956..
Documents for 1955-1956 and 1961 forthcoming.
People
Alan Pyne - the Artists Loan shed and 119 Dartford Road - (1960s to 2000s)..
Bands
Accessories, Components, etc.
Component date codes - (1960-1968).
Control panels - black, copper, and grey (1960-1968).
JMI's cabinet makers (contractors) - 1960-1967.
Rexine and Vynide coverings - 1957 to 1963 (to be continued).
Handles on Vox AC30 cabinets - Late 1960 to 1964 (to be extended).
Geloso speaker connectors and sockets - 1961-1964.
Chassis numbers stamped by Burndept Electronics (one of JMI's contractors) - 1962-1968.
Burndept chassis colour codes - 1962-1968.
AC30 stands - 1960-1967.
AC30 swivel side stands - 1964-1967.
Coloured AC30 covers - 1962-1965.
WIMA capacitors - 1960-1967.
Hunts electrolytic capacitors - 1960-1964.