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 Vox Foundation Bass serial number 2501 (pictures to follow shortly). An entry has also been made for Vox Supreme serial number 2351, inspected (designated ready for sale) on the 26th of August, 1970.
25th October
Entries for a couple of later JMI Conquerors have been added on this page - 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 registered here. The main page on these pedals can be found here.
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 - see this page.
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 6460, 6871, and 6943.
14th August
A couple of details from a large circuit diagram for the Vox Discotheque / Discotape, 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 added to this page.
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 VSEL Conqueror serial number 2082, 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 1494, 1516, and 1542; and "Vox Sound Equipment Limited" numbers 2032, 2069, 2340, and 2368.
26th February
Entries for seven Defiants have been added: JMI serial number: 1393; "Vox Sound Equipment Limited" 2153 and 2283; and "Vox Sound Limited" 2570, 2670, 2820, and 2845.
25th February
Entries for seven Supremes have been added: JMI serial numbers 1107 and 1291; "Vox Sound Equipment Limited" 2284; and "Vox Sound Limited" 2339, 2512, 2526, and 2591.
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 on this page.
VSEL Traveller serial number 2000.
7th January
Thanks to Josh, pictures of JMI wah serial number 6382 have been added on this page. 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.
Updates November and December 2021.
Updates September to December 2020.
Updates August to December 2018.
Updates for June and July 2018.
Updates for January to May 2018.
Updates for November and December 2017.
Updates for September and October 2017.
Updates for July and August 2017.
Updates for January and February 2017.