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In Reply to: RE: Container find posted by otc on June 30, 2009 at 08:30:17
I have added some pictures AND a diagram of the poweramp. Pls. browse the jpg's - and disregard the 2 fishing-pictures.
I didn't approach this very smart, because I found some info on a danish homepage. Still I hope for Your kind help regarding som questions.
Picture BOFA V60 pre1:
What are the round things in the top of the picture? Some wires are soldered to each. Looks like capacitors and then again not.
I can inform that the two squares to the right are small encapsulated trafo's. For microphone input?
There's a lot of components soldered to the circuitboards, but it is hard to take a good photograph.
BOFA V60 main3:
What is the other setting for? The technical ones might deduct this from the diagram "v60 diagram".
BOFA V60 main2:
What can I say? This module alone weighs in at 9,5 kg. There is a power cord for 220 Volt connected to the chassis, soldered to two of the pins in the 12 pin plug.
You can see the "magic eye" as well.
If anyone can tell me anything interesting from these jpg's and the diagram, I will be very thankfull.
Now for the info I allready have found:
The real name of the amplifier system is BOFA, which was an industrial sound sub-company of B&O. It was started in 1927 and finally sold to The Philips International Group in 1971, who ran the company for some years after that.
BOFA manufactured primarily sound and light-systems for Cinema's and Movie-theatres.
The amps came in model V15, V40 and V60, where the number tells the output in watts of these mono-modules.
They were considered extremely rugged, highly reliable and with state of the art sound. This is to be considered related to the construction year, which is 1959 for the V60.
In my hometown, the local cinema used V60's until 1991, where they were upgraded to Italian transistorized amps with much higher power and, according to sayings, a quality that was a step or two down from the V60's.
The amps were paired with loudspeaker-systems, often consisting of open baffles with 3 bass-speakers and 1 mid/treble horn. The matching impedance of the loudspeakersystems should be 20 ohms.
Thank You. Hoping for some comments and insight.
Regs
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