List of updates / new info. on Vox solid state amps (1967-1972).

2025

27th January

A series of updates and new info coming shortly.

2024

20th December

Thanks to John, an entry added for (pictures to follow shortly). An entry has also been made for , inspected (designated ready for sale) on the 26th of August, 1970.

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25th October

Entries for a couple of later JMI Conquerors - serial numbers 1466 and 1490.

JMI Conqueror serial number 1466.

JMI Conqueror serial number 1480.

4th October

Thanks to Richard, pictures of Queen's Award wah pedal, serial number 7685, now . The main page on these pedals .

11th September

A further instance of a mis-printed control panel, a small batch produced early in production - at the Top Boost switch the legend reads "OFF" - "MRB" instead of "OFF" - "ON". The panel belongs to the preamp of a Defiant or Supreme (power section missing).

Early Vox Defiant or Supreme control panel, detail.

10th September

Thanks to Ulrik, pictures of Italian-made "Clyde Script Wah" serial number 5612, produced for use in Italy, its board potted to prevent copying of the circuit. A number of such pedals were also made for use in England, a "Queen's Award" base-plate being fitted instead of the type pictured below - .

Italian-made "Clyde Script Wah" serial number 5612.

Also to record that entries for three more English-made "Grey Wahs" have been created - serial numbers , , and .

14th August

A couple of details from a large circuit diagram for the , drawn up with a "Vox Sound Equipment Limited" information panel. Issue 1, however, is dated 8th October, 1971, well into the "Vox Sound Limited" era. Further details to follow.

DT001 to DT014 are likely to have been mechanical drawings for specific assemblies.

The main information panel.

Changes, top left of the sheet.

30th June

Thanks to Anthony, pictures of "Vox Sound Limited" Supreme serial number 2532, still in excellent condition, have now been .

VSL Supreme serial number 2532.

19th May

Thanks to Pavel, pictures of a "Vox Sound Equipment Limited" Defiant with the back board from JMI Dynamic Bass serial number 1093.

VSEL Defiant, serial number unknown.

16th May

Thanks to Hubi, some updated pictures of , nicely restored.

VSEL Conqueror serial number 2082.

5th April

Thanks to Michael, pictures of "Vox Sound Equipment Limited" Defiant, serial number 2172, probably ready for sale in late spring / early summer 1969. One of the main power transistors has the date code "6918" = 18th week of 1969. Further pics can be found here.

"Vox Sound Equipment Limited" Defiant, serial number 2172.

28th February

Some notes on the pre-production Supreme power section from the second half of 1966. The orange 2250uf Plessey capacitors are dated "JUN 1965", the grey Radiospares 5000uf cap. "PXB" = February 1966. The Radiospares cement caps have "XC" and "XE" = March and May 1966.

Three of the main power transistors (2N3055s) are branded "ITT". The fourth, pictured below, is unbranded, the print giving only "2N3055" and "6 R". Whether "6" stands for 1966 is unknown. The wiring loom is extremely tight and all solder joints are apparently original, which is to say that the transistors have a good chance of being original too.

The unbranded 2N3055 with "6 R". The other three power transistors are branded "ITT".

The four heatsinks on which the transistors are mounted are fixed to the upright of the chassis with four 4BA machine screws (and nuts) each. It is impossible to remove the middle pair of heatsinks without first removing the mains transformer - not an ideal arrangement where repairs/replacements are concerned.

27th February

Entries for six Conquerors added: JMI serial numbers , , and ; and "Vox Sound Equipment Limited" numbers , , , and .

26th February

Entries for seven Defiants have been added: JMI serial number: ; "Vox Sound Equipment Limited" and ; and "Vox Sound Limited" , , , and .

25th February

Entries for seven Supremes have been added: JMI serial numbers and ; "Vox Sound Equipment Limited" ; and "Vox Sound Limited" , , , and .

24th February

The plate of "Vox Sound Equipment Limited" Traveller, serial number 2000, the first of a batch (inherited from JMI, which had ceased trading by March '68) made ready for sale by the new company in late 1968 / early 1969. VSEL began its number sequences at 2000 across the range - we have Dynamic Bass number 2000, and Super Foundation Bass number 2000 too. Traveller serial number 2001 can be seen .

VSEL Traveller serial number 2000.

7th January

Thanks to Josh, pictures of JMI wah serial number 6382 have been . The pedal had wrongly been given as number 6192.

From around serial number 6300 the number was stamped directly on the base and the trafolyte panel done away with.

JMI wah serial number 6382.

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