Dating vox ac50
We're trying to find the proper date of production for it. Anyway, until I can see some photos I can't give you any clue as to when it was made, however since it's a non-Top Boost, it will have to have been made before late 1965. I dont believe in gutting components unless its absolutely necessary. I think your flickr account is set to private..maybe change the settings to public. AC30 Serial numbers started with the number #4000 and JMI made around 20,000 AC-30's. It had a "W" as it had white knobs and was one of "The Shadow's" amps and made in early 1960. 1964 AC30 is "#12911 N" So by mid `64 they had already made nearly 9,000 AC30's.(8911).
I've been been working on this amp for my good friend. Using the Hunts/Erie accepted manufacturing decoder*, this cap is : SWY = October 1965. WHITSUNDAY = 1234567890 W = 1 H = 2 I = 3 T = 4 S = 5 U = 6 N = 7 D = 8 A= 9 Y = 0 Therefore S = 5 ( 1965 ) W = 1 Y = 0 Therefore.... That was the only Serial Number that was recognized by the factory. The post has your login name as well as the amp mentioned above. Your amp is an early black panel (1960 to '61) chassis in a later cab. Then came black 6 hole panels like yours, and by '62, the familiar candy panels. Same 6 hole black panel and Haddon transformers as yours.
Vox was the pre-eminent musical instrument amplifier manufacturer in the UK and much of Europe in the late 1950’s and early 1960’s, and produced most of the amps used by the most popular bands at the time.
If you’ve heard an early 1960’s pop or rock record from the UK – you’ve heard Vox amplifiers.
The biggest change in 1965 was the move to solid state rectification, a gradual change, from the beginning of the year. Round Amphenol power connectors had come in much earlier.
For the date code system employed on these, see this page.
I'm assuming that's not original, though it's a clean install which could be factory installed. It doesn't match the criteria of any Rose Morris amp. That was the only Serial Number that was recognized by the factory. There are date codes on some parts, mainly the Wima Tropyfol caps(gold coloured) and also on the "mustard" caps, woden Tranny's & Hunts filter Caps. This Is Not the actual Serial number, but an inventory control #.
AC30 Serial numbers started with the number #4000 and JMI made around 20,000 AC-30's. It had a "W" as it had white knobs and was one of "The Shadow's" amps and made in early 1960. 1964 AC30 is "#12911 N" So by mid `64 they had already made nearly 9,000 AC30's.(8911). All JMI/Vox Amps had a Serial Number on the plate that was affixed to the back panel of the cabinet. I guess I have to pony up with Photobucket in order to post. You should see the char on the chassis from it burning up.
By early to mid 1965, Burndept Electronics, which shared a building with Vox off West Street in Erith, Kent, took over the bulk of production, and serial numbers consequently become more reliable as a means of dating - Burndept was a much more orderly place than Triumph.
It should be said, however, that the Burndept chassis numbers stamped on the aluminium upright underneath the input jacks do not run in sequence with the serial numbers: Valve rectified AC50 - note the three main valves from left to right, the GZ34 rectifier, and two EL34 output valves. Amps produced for Vox by Triumph Electronics do not have chassis numbers.