I've been told that this is the place to come for guitar and amp wisdom, so hoping someone can help me out...
Being a tragic eBay addict, I picked up an old valve head last week, and I'm struggling to find out any information about it or the company that made it. It's a basic 50W single channel, non master volume head, no reverb, with two ECC83 and two EL34. It was being sold as a bass amp, and apparently came with a 1x18 cab, but there's nothing about the amp itself that seems bass-specific. Controls are on/off, Volume, Treble, Bass and Mid, and there's a Presence control which is a six-position switch. It sounds great in a sort of Sound City / Hiwatt vein.
To judge by the cheesy front panel graphics, it was made in the early 70s. It is badged 'Center', and a label on the back says it was made by Center Electronics of Rayleigh, Essex. The model number just seems to be 'Mk 2 50'. There is a serial number, and the whole thing looks like a production amp rather than a prototype or one-off.
It has been suggested that it looks a bit like some of the early Roost amps, and I discovered that Roost apparently bought a defunct local electronics concern called Centre (or Centre?) in about 1975. However, it doesn't seem to be identical with any Roost model I know of. So my best guess is that earlier on, Center made their own amps in small quantities (presumably!), perhaps using Roost cabinets and some parts. Anyone ever come across one of these before?
A few photos -- sorry, haven't had a chance to get inside it yet: http://i1064.photobucket.com/albums/u364/stuckfast/front.jpghttp://i1064.photobucket.com/albums/u364/stuckfast/back.jpg http://i1064.photobucket.com/albums/u364/stuckfast/chassis.jpg