Reading Schematics 5F6-A Annotated Schematic With Signal Flow and Component FunctionBass Tube Amp Schematic - DIY 12AU7 Tube Preamplifier. I'm not sure what motivated me to decide on building a high-gain tube preamp of this sort. Maybe it was the tube computer sound card idea I have seen, or the fact that I have enough junk to fill a dump truck.. A bass reflex system (also known as a ported, vented box or reflex port) is a type of loudspeaker enclosure that uses a port (hole) or vent cut into the cabinet and a section of tubing or pipe affixed to the port. This port enables the sound from the rear side of the diaphragm to increase the efficiency of the system at low frequencies as compared to a typical sealed- or closed-box loudspeaker. "compAA3" Compactron AM tube radio This is the classic AA5 AM tube radio modified to use three Compactron tubes. The diagram below shows the modifications (in green) done to an otherwise standard AA5 AM radio circuit..
So how do these differences affect the sound? To start with, the series resistance at the emitter limits the amount of drive available to drive an amplifier input (although not by much), and in concert with the series capacitor forms a voltage divider with the output shunt resistor and the input impedance of the amplifier plugged into it. This drops the available signal only a trivial amount.
Fender Super Bassman Tube Amp Schematic - Model 135W | electrical ... Fender Super Bassman Tube Amp Schematic - Model 135W
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