LARGE BOX AC50s - SOLID STATE RECTIFIED

1967 and 1968

Serial numbers in the 8000s

Amps assembled at the Burndept factory (always the presence of the stamped chassis number). American-style logos.

Late Vox AC50 - 1967 to 1968

The band "influention" with a late large box AC50 (note the logo) on top of a Super Foundation Bass speaker cabinet.

The external characteristics of these amps are much as : American style logo at front, two-pin corner protectors, Amphenol connectors on the back panel. The only major difference is the regular appearance now of the white warning plaque.

Internally: amps begin to have more and more components used in the solid state amps: yellow Dubillier coupling caps in the preamp, and small Radiospares potentiometers. CCL capacitors had already been brought in by around serial number 7400.

It is also worth noting that cathode bypass caps are dropped for the preamp valves (V1 and V2).

Vox AC50 serial number 8168
Vox AC50 serial number 8168

Above details from serial no. 8168. First pic showing one of the small pots in the preamp (the same type as in the early solid state amps). The second pic showing two of the yellow Dubillier caps. For examples of the Vox solid state amps, .

1968

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By serial number 8168, however, we are already well into 1968: the CCL filter capacitors are dated "B8" = February 1968. An outline of the CCL codes .

Vox AC50 serial number 8168

In the left-hand capacitor, one can only see the name "CCL". At right though, we have the date code "B8".

These late amps were produced close to the end of Jennings Musical Industries (in mid 1968). For the rise of "Vox Sound Equipment Limited" (VSEL), which took over from JMI, on the Vox Supreme website. AC50s issued by "Vox Sound Equipment Limited" are .

Below, a register of amps. If anyone knows of others that have not yet been included, as ever do let me know.

Serial number 8063 - whereabouts unknown

  • vox ac50 serial number 8063
  • vox ac50 serial number 8063
  • vox ac50 serial number 8063
  • vox ac50 serial number 8063
  • vox ac50 serial number 8063
  • vox ac50 serial number 8063
  • vox ac50 serial number 8063
  • vox ac50 serial number 8063

Serial number 8106 - currently in the USA

  • Vox AC50 serial number 8106
  • Vox AC50 serial number 8106
  • Vox AC50 serial number 8106

Serial number 8108 - currently in Europe

  • Vox AC50 serial number 8108
  • Vox AC50 serial number 8108
  • Vox AC50 serial number 8108
  • Vox AC50 serial number 8108
  • 8108

Serial number in the 8000s - whereabouts unknown

No serial number, but chassis number 4076. One can just see in the second picture one of the red CCL capacitors. Its date code appears to be "C7" = March 1967. As in the case of amps on this page, there are no cathode bypass capacitors for the preamp valves.

From this point serial number plates are headed "AMPLIFIER" rather than "VOX AMPLIFIER"

Serial number 8168 - currently in the USA

  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168
  • Vox AC50 serial number 8168

Chassis no. 4232. The CCL filter cap has the date code "B8" = February 1968. The preamp has yellow Dubillier capacitors and metal fixing plates for the pots (both found in Vox solid state amps).

NEW

Serial number in the 8000s

This amp is here because it has no cathode bypass caps. Amps with numbers in the 7000s seem to have them. Note the presence of the doubled up red CCL main filter caps on the upper chassis.

NEW

Serial number unknown

  • 8178
  • 8178
  • 8178
  • 8178
  • 8178
  • 8178

Chassis no. 4071. No serial number plate, so the amp's position here is not absolutely certain. However, in company with the amp above, number 8178, there are no cathode bypass caps in the preamp. The pots have the date code "EN" = May 1966. Thanks to Misha for the pictures.

Serial number 8178 - currently in Germany

  • 8178
  • 8178
  • 8178
  • 8178
  • 8178
  • 8178
  • 8178
  • 8178
  • 8178
  • 8178
  • 8178
  • 8178
  • 8178

Very probably issued with the solid state Foundation Bass cab which accompanies it.

Serial number 8219 - currently in the USA

  • 8168
  • 8168
  • 8168
  • 8168
  • 8168
  • 8168
  • 8168
  • 8168

Chassis no. 3422. New grille cloth and replaced logo.

Serial number 8297 - currently in Australia

  • 8297
  • 8297

A late JMI AC50, probably one of the last to be made, along with a beautiful collection of Rickenbackers. Thanks to Kieren for the pictures.

Serial number in the 8000s - currently in Australia

  • 8000s
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  • 8000s

Chassis no. 4282. The CCL filter cap has the date code "B8" = February 1968.

Serial number probably in the 8000s - currently in Denmark

  • 8000s

Serial number probably in the 8000s - currently in Spain

  • 8000s

Pictured with a re-grilled Dynamic Bass (solid state series) cab.

Serial number probably in the 8000s - whereabouts unknown

  • 8000s
  • 8000s
  • 8000s
  • 8000s

Serial number probably in the 8000s - whereabouts unknown

  • 8000s
  • 8000s
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  • 8000s