Introduction

Notes on how to date AC50s

SMALL BOX AC50s - AC50 mark 1 (copper panel)

The design of the AC50 mark 1 (autumn 1963).

AC50 mark 1: thin box - serial numbers 1000-1100.

AC50 mark 1: serial number 1015B and cab.

AC50 mark 1: serial number 1034B and cab.

AC50 mark 1: thick edged box, diamond input - serial numbers 1100-1530.

The Beatles' early AC50s.

Other bands with thin-edged AC50s.

Bands with thick-edged (diamond-input) AC50s.

A JMI design for an AC50 Super Twin trolley (?).

Bands with later AC50s.

Hunts capacitor date codes in early Vox AC50s.

LARGE BOX AC50s - AC50 mark 2 - valve rectified, twin channel

The electronic design of the AC50 mark 2.

Introduction to Vox AC50 mark 2 large box amplifiers.

The pages below give late small box and early large box AC50s (which are intermingled at first) in serial number order:

1. Serial numbers c. 1300-1750.

2. Serial numbers currently unknown.

3. Serial numbers c. 1750-2200.

Sets of images of serial number 1354:

Serial number 1354, general views; - power section; - and preamp.

A set of images of AC50 Foundation Bass serial number 1384:

Serial number 1384, general views.

Sets of images of serial number 1578:

Serial number 1578: box; - power section; - and preamp.

Sets of images of serial number 1749:

Serial number 1749, general views; - main chassis and preamp; - and speaker cabinet.

An early large box valve rectified AC50, serial number unknown:

Serial number unknown - a set of photos.

LARGE BOX AC50s - AC50 mark 3 and 4 - solid state rectified

4. Serial numbers in the 2000s (assembled by Triumph Electronics for Vox).

5. Serial numbers in the 2000s (assembled by Burndept Electronics for Vox).

6. Serial numbers in the 3000s.

7. Serial numbers in the 4000s.

The AC50 with add-on reverb.

8. Serial numbers in the 5000s.

9. Serial numbers in the 6000s.

10. Serial numbers in the 7000s (AC50 Mark III and IV).

11. Serial numbers in the 8000s (AC50 Mark IV).

12. Late AC50s issued by Triumph Electronics in late 1967.

Vox PA50 (MC50) amplifiers

Vox 50 watt Public Address amplifiers (1964-1966) - the MC50.

Vox 50 watt PA amplifiers (1966-1968).

A Vox MC50/4 PA amplifier from 1967.

Later AC50s - VSEL, VSL and Dallas Arbiter (Dallas Musical Limited)

Vox Sound Equipment Limited AC50s - 1967-1968.

Vox Sound Limited AC50 warranty literature.

A Vox Sound Limited AC50 produced by Dallas Musical Limited, early 1975.

13. Vox Sound Ltd AC50s - 1970-1976.

SPEAKER CABINETS

Foundation Bass cabinets.

Bass speakers.

Super Twin speaker cabinets: 2 x 12" and Goodmans Midax horn.

Trolleys for AC50 Super Twin speaker cabinets.

Goodmans and Fane speaker catalogues and pricelists.

FACTORIES

The Burndept works at Erith - contractors for Vox.

Triumph Electronics, Purley - contractors for Vox.

The Triumph PAV50.

COMPONENTS AND MISCELLANEOUS

Schematics.

Adverts, catalogues and brochures part 1.

Adverts, catalogues and brochures part 2.

Dealers and small ads.

Beat Monthly magazine.

Brimistors.

Transformers