Vox AC30: grey panels, Celestion silvers

1965: serial numbers in the 18000s and 19000s

The dome voltage selector, which first appears in AC30s with serial numbers in the high 16000s.

Continued from the page on AC30s with .

Control panels are grey. Dome voltage selectors occur as standard, as they are for amps with serial number in the 17000s. Chassis were assembled by Burndept, the contract with Westrex having ended in early 1965, shortly after JMI's move (expansion) into Burndept's West Street Factory in Erith - the "West Street Works".

The four models are still: "TB" for "Top Boost", designated "TB" on the serial number plate, the circuit's controls normally integral in the control panel; "Treble" designated with a "T"; and "B" for Bass. The two last had their own schematics, in order: OS/056, OS/065 and OS/057. "Normal" voicing no longer seems to be an active designation. Some notes on the treble circuit, which was new in 1964, can be found .

A good number of the amps, or rather chassis, illustrated below are "Top Boost" models. "Bass" and "Treble versions are comparatively uncommon. Serial numbers are machine stamped, the model (voicing) - "T", "B" or "TB" - still added with hand stamps, however.

A growing collection of documents relating to the AC30 in 1965 .

Celestion silver alnicos - the T1088 - designed for JMI in the Spring of 1964 are standard. Grille cloth is normally now black.

If anyone knows of further amps that should be incorporated on this page, .

Serial numbers in the 18000s

Serial number 18000 - currently in the USA

Existence recorded by Jim Elyea

Serial number 18173 B - currently in the UK (?)

Complete with its original cover. The Woden choke has the date code "HV" = September 1964, and the transformers "KV" = October '64.

Serial number 18313 TB - currently in the UK (?)

Top boost controls integrated in the panel.

Serial number 18427 TB - currently in the USA (?)

Small pictures from ebay some years ago. Note the brown grille cloth and the link voltage selector. It may be that the serial number plate was added from some other source.

Serial number 18450 - currently in the USA

Existence recorded by Jim Elyea

Serial number 18549 TB

Top boost controls integrated in the panel. The mains transformer and grille cloth replaced. Few visible changes otherwise in the preamp and power section.

Serial number 18786 TB - currently in Italy

Currently (December 2020) . Control panel with integrated Top Boost controls. The Woden choke has the date code "HV" = September 1964, and the output transformer "KV" = October '64.

Serial number 18900 - currently in the USA

Existence recorded by Jim Elyea

SERIAL NUMBERS UNKNOWN

Currently in the USA

Chassis number 8407. A Bass model. The cabinet has been regrilled. Woden and Albion transformers. The Woden OT has the date code "HV" = August 1964. The Mullard mustard capacitors in the preamp have B/64 and B4N = second quarter of '64. One of the blue Hunts cathode bypass caps has "HIT" = 23rd week of '64. The main TCC filter cap in the preamp has the date code "VH" = August 1964.

Serial numbers in the 19000s

Serial number 19340 - currently in the USA

Existence recorded by Jim Elyea

Serial number 19427 T - currently in Europe

Original footswitch still present.

Serial number 19455 - currently in Germany

Sold on ebay some time ago.

Serial number 19575 - currently in the USA

Existence recorded by Jim Elyea

Serial number 19665 TB - currently in the UK

Top boost controls integrated in the panel. The cover is from a 1980s AC30.

Serial number 19858 TB

As above, Top boost controls integrated in the panel. The original runner designating the model is still present lower right on the grille cloth.

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