Vox AC30: copper and grey panels, Celestion blues and silvers
Mid 1964: serial numbers in the 14000s
Serial number 14592, amp model and number itself machine stamped.
Continued from the page on AC30s with serial numbers in the 13000s. So far no Super Twins with stray numbers in the 14000s have come to light.
Throughout the 14000s, as in the case of amps with numbers in the 13000s, one finds three models: the "Treble", designated with a "T" on its serial number plate; "Normal" voicing designated by an "N", and Bass designated "B". All three had their own schematics, in order: OS/056, OS/065 and OS/057. Some notes on the treble circuit, which was new in 1964, can be found on this page.
"TB" - also stamped on the plate - indicates that the amp was fitted with the Top Boost circuit.
Documents relating to the AC30 in 1964 are being assembled here.
Significant component date codes in amps on this page are mostly of mid 1964: 20th week of the year for a blue Hunts electrolyic capacitors; second quarter of '64 ("B/64") for Mullard "mustard" caps.
Transformers are mostly Albions and Parmekos. At this point, Woden (hitherto used more or less exclusively by Burndept) was designing a simplified and cheaper set of transformers for JMI - see this page. Existing stocks had presumably been used up.
Celestion silver alnicos - the T1088 - designed for JMI in the Spring of 1964 did not wholly supercede the Celestion blue - the T530 - at first. Amps with serial numbers in the 14000s tend to have one or other for quite a while. The earliest date codes known for Celestion silvers are from the middle of May.
New grey control panels, which are also to be found sporadically on amps with numbers in 13000s, were used with increasing frequency towards the end of the 14000s.
As mentioned at the head of this page, serial number plates are normally machine stamped. The voicing - "N", "T" or "B" - is still hand stamped, however.
If anyone knows of further amps that should be incorporated on this page, do let me know.
Serial number 14039 B - currently in Europe
A mixture of Mullard mustard and WIMA coupling capacitors in the preamp. Speakers are Celestion silvers - T1088 - which had come in by May 1964. The mustards have the date code B4N = Blackburn factory, second quarter of 1964. One of the blue Hunts electrolytics has the date code "HWT" = 20th week of 1964.
Serial number 14060 - currently in the USA
Existence recorded by Jim Elyea.
Serial number 14062 B - currently in the UK
Chassis number 07244. Assembled by Burndept. Either Parmeko or Albion transformers. A combination of Mullard mustard and WIMA coupling caps in the preamp.
Serial number 14188 T - currently in the UK
Chassis number 05712. Assembled by Westrex? Equipped with Celestion blues.
Serial number 14230 - currently in Denmark
Exported to Denmark early on. See also serial number 14317 immediately below. "Europaisk Musik Import" acted as agent/distributor for Vox in Denmark through to 1970 and probably beyond. Voltage and frequency rating whited out on the serial number plate.
Chassis no. 05976. Assembled by Westrex? Transformers are Albions. The Mullard mustard capacitors in the preamp have date codes: "B/64" = second quarter of 1964. One of the blue Hunts electrolytic caps has the date code "WIT" = 13th week of '64. Speakers are Celestion blues. At one time the amp had swivel side stands. Thanks to Finn for the pictures.
Serial number 14317 T - currently in Denmark
Probably exported to Denmark early on. In company with serial no, 14230, above, the voltage and frequency rating has been whited out. Speakers are Celestion silvers. The original cover, handsome in orange, still survives.
Serial number 14358 T - currently in Finland
Serial number 14513 - currently in Europe
Serial number 14545 - whereabouts unknown
Serial number plate only for the time being.
Serial number 14592 - currently in Europe
Mullard and WIMA coupling caps. The Mullards have date codes "A4N" and "B4N" = first and second quarters of 1964. The speakers are Celestion silvers.
Serial number 14625 T - currently in the UK
Superb condition. Chassis number 05751. Parmeko transformers and choke. The Mullard mustard caps have date codes "A4N" and "B4N"(B/64) = first and second quarters of 1964. The main filter capacitor (chassis top) has the date code "VC" = March 1964. The original silver Celestion T1088s are still in place. Thanks to John for the info.
Serial number 14629 T - currently in the UK
Copper panel, Celestion silver alnico speakers.
Serial number 14678 - currently in Europe
Grey control panel; Celestion blues.
Serial number 14800 - currently in the USA
Existence recorded by Jim Elyea.
Serial number 14xxx - currently in Europe