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In Reply to: RE: Container find posted by otc on June 30, 2009 at 08:30:17
As others have pointed out , it is probably a commercial unit although it is most complex as it seems to have a phono input as well as mike inputs If there is no circuitry ( live, that is ) in the input module then it must have been dependent on the in the input devices having their own preamps and the input module serving as a line switcher,
Don't know about the 60 volt output but many commercial amplifiers have a 70 volt output for commercial speakers and thus need a matching transformer for normal impedance speakers. You may want to take a closer examination of the output transformer, however. Most US commercial types have various taps in order to run normal impedance speakers. Being tha B&0 is still around they may have the specs still for the output transformer.
As with any vintage amplifier most likely any electrolytic caps will be shot. You do not mention any rectifier tube so I am assuming that the the unit has a solid state rectifier, but please check carefully as some theater amps in the US had separate power supplies, separating the B+ and filament circuitry from the actual signal amplifier circuitry.
A photo of the internals would be helpful, although I doubt if many of these Euro type commercial units ever made it to the US.
Stu
I will gladly provide some photos of the internals. Will wait 'till tomorrow, for better ligth.
You are right about the solid state rectifier, as well as a mains transformer, and a series of 600 V, 32 microF capacitors.
Also an encapsulation that holds ?? the output transformer maybe.
And a 2-position switch with a sign saying 100V, 20 Ohm.
Thank You so far.
He should measure the 60V output. If it's as I suspect, it might be 60VDC to power the exciter lamp for the soundtrack.
My fault - it is the version of the amplifier, V60. I thought it meant 60 Volt.....
There is no 60 V output as such. The only output is one loudspeaker terminal, DIN-type (a flimsy one), labeled "Hojttaler" which is danish for loudspeaker.
Then the brown/red knob on the front would be a security circuitbreaker? It is connected in series with the power switch.
Finally I'm having the idea, that the line unit could be a passive selector/mixer, since there are 2 pots labeled Reg1 and Reg2, that could correspond to the 2 microphone and 2 lightcell DIN input-terminals? Maybe...
Will post pics of internals tomorrow.
Thank You so far.
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