This transformer is useful not only in crystal radios but in tube regenerative and trf. T72510 t725 t725 t72510 the bogen models t725 and t72510 transformers are speaker matching transformers that allow an 8 ohm speaker to be connected to 70v or 25v ampli fier outputs.
Dave S Homemade Radio Bogen T725 Technical Data
Bogen t725 wiring diagram. It shows the components of the circuit as simplified forms and also the power and also signal links in between the tools. Brit byrnes scanned subject. The bogen model t725 transformer is a speaker matching transformers that allow an 8 ohm speaker to be connected to 70v or 25v amplifier outputs. The bogen t725 audio matching transformer has been a favorite of hobby radio builders for over a decade. Speaker layout wiring methods and phasing are the same for either technology and are covered on pages 70 76. Free download bogen schematic diagram bogen electronic circuit schematics bogen circuit schematics diagram bogen free schematics download results 1 3 of 3 for bogen 018 seconds singlefilephp.
The t725 can be tapped at 4 2 1 12 14 and 18 watts. S86t725pg8w variationsthe loudspeaker assembly shall be a bogen model s86t725pg8w or s86t725pg8wvr s86t725pg8wvk s86t725pg8wbr s86t725pg8wbrvr or s86t725pg8wbrvk or equivalent 8 cone type loudspeaker having a frequency response of at least 50 hz to 12 khz. The t725 can be tapped at 4 2 1 12 14 and 18. An 8 ohm secondary connects to the speaker and the multi tap primary connects to the 70v or 25v amplifier output. Central amplified systems pages 64 67 self amplified systems pages 68 69. Loudspeaker installation methods and connection techniques author.
Series parallel speaker wiring wire loss chart notwithstanding bogens efforts to ensure the accuracy of these drawings bogen makes no representation or warranty express or implied as to the accuracy or reliability of the drawings or any statement depiction or implication set forth therein or arising therefrom as to the product to which. Variety of bogen paging system wiring diagram. The outer two black wires are 8 ohms. Axial sensitivity shall be 95 db measured at 1 watt4 feet. The bogen t725 audio transformer is an excellent audio matching transformer for your crystal radio. An 8 ohm secondary connects to the speaker and the multi tap primary connects to the 70v or 25v amplifier output.
This bogen t725 has 3 black wires. Dave schmarder with the help from ramon vargas demystifies this transformer. A wiring diagram is a simplified conventional pictorial representation of an electric circuit. Explore its applications in this article. However very little technical data has been available for this builders gem. Loudspeaker installation methods and connection techniques.
This allows you to use lower impedance headphones with your crystal radio set. The inner black wire is the common ground connection.
Gallery of Bogen T725 Wiring Diagram
