Power transformer rectifier info

Note: I am not showing any bias windings or bias taps on any of the above diagrams.

Half wave rectifier circuit - This circuit is found on the old 6G15 Fender stand alone reverb units. It produces very rough DC voltage and needs lots of filtering to smooth it out. The transformer does not need a 5 volt tube rectifier filament winding since there is no tube rectifier. It is very cheap to set up but all you save is 3 diodes and the DC is so rough that you have to filter the crap out of it.

Full wave diode rectifier circuit - This circuit produces DC voltage that is twice as smooth as the half wave circuit. It requires a center tap on the high voltage winding. The transformer does not need a 5 volt tube rectifier filament winding since there is no tube rectifier.
If you measure the AC voltage across the two Red AC windings you will usually see about 700 volts AC. You may end up with roughly 400 plus volts DC coming off the rectifier, depending on the winding current spec's for the high voltage winding. The larger the current rating, the less of a voltage drop you will get under load.

Full wave tube rectifier circuit - This circuit produces DC voltage that is twice as smooth as the half wave circuit. It requires a center tap on the high voltage winding. The transformer requires a 5 volt tube rectifier filament winding to heat the tube rectifier filament.
If you measure the AC voltage across the two Red AC windings you will usually see about 700 volts AC. You may end up with roughly 400 plus volts DC coming off the rectifier, depending on the winding current spec's for the high voltage winding. The larger the current rating, the less of a voltage drop you will get under load.

Full wave bridge rectifier circuit - This circuit produces DC voltage that is 2 times as smooth as the half wave circuit. It needs way less filtering than a half wave circuit and has the added advantage of not needing a center tap on the high voltage winding. The transformer also does not need a 5 volt tube rectifier filament winding.
If you measure the AC voltage across the two Red AC windings you will usually see about 350 volts AC. You may end up with roughly 400 plus volts DC coming off the rectifier, depending on the winding current spec's for the high voltage winding. The larger the current rating, the less of a voltage drop you will get under load.
NOTE: Notice that the high voltage winding AC voltage is roughly half that of the full wave rectifier.

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