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FDP Forum / Amp Mods, Repairs, and Projects / What is this cap, sockets and transformer?

blues74 EU "...gonna be a magic boy..."	Jul 29th, 2010 07:54 AM   Edit   Profile   Print Topic   Search Topic Hello I've got an Italian Meazzi Factotum Special (2 channel PA amp with tape echo, from about 1960-'62) that I'm trying to bring back to life. If anyone has one of these, or even has a schematic, I would be very happy:-) What you see in the pic: - Two power transformers, one very small and one bigger. (The two OT's for each channel are on the other side of the board). Why would it have two PT's? The amp has 14 tubes... - A big metallic cap which says "CF 50 + 50 uF", and has two voltage ratings. What could this mean? - Above the bigger PT, near the speaker outputs, are two tube sockets. I'm guessing these are rectifiers? One for each channel? And how can you tell what tubes it wants? Sockets were empty when I got it. According to the owner, the amp has worked without these tubes, which I find confusing, but he might be wrong). Picture (This message was last edited by blues74 at 07:57 AM, Jul 29th, 2010)
Steve Dallman Contributing Member *** Merrill, Wisconsin Shoot, Winter's over already?	Jul 29th, 2010 08:31 AM   Edit   Profile   Print Topic   Search Topic That small transformer with the two yellow wires is the choke.
SonicBlue Sunbury-on-Thames	Jul 29th, 2010 09:01 AM   Edit   Profile   Print Topic   Search Topic You can downlaod a schematic (hand drawn) from this link
jazzguitar Delicious tone ! Looking for the perfect job	Jul 29th, 2010 03:34 PM   Edit   Profile   Print Topic   Search Topic That is the peak and the permanent voltage rating.
blues74 EU "...gonna be a magic boy..."	Jul 30th, 2010 10:04 AM   Edit   Profile   Print Topic   Search Topic Thanks! How would you see if someone has put in solid state rectifying? A bunch of diodes somewhere?
rfrakes331K USA RonHalen Jokingly He Says	Aug 11th, 2010 06:25 AM   Edit   Profile   Print Topic   Search Topic On a PA sometimes there are impedance matching transformer modules that plug in like that. They provide balnce for the Microphones. This was true for the Dukane PA I had. You would see 4 diodes in a box pattern.

FDP Forum / Amp Mods, Repairs, and Projects / What is this cap, sockets and transformer?

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