Negative Voltage using tube rectifier?

[ohynot]

hi all,

How to make negative voltage using Tube rectfier?
will a diode after rectifier will do? any other method?
thanks.

ynot.

 

[Eli Duttman]

You need diodes with discreet, not shared, cathodes. If you are building a negative supply using a CT power trafo winding: connect the cathodes to the ends of the trafo, ground the CT, and tie both plates together. Take the negative rail from the connected plates.

 

[316a]

hi all,

How to make negative voltage using Tube rectfier?
will a diode after rectifier will do? any other method?
thanks.

ynot.

6AL5 would be suitable for low current applications for use as a full wave . Dampers or 35Z4 / EY84 etc for higher currents half wave . If you're intending using tube diodes for bias supplies I'd recommend against it though . It's a whole lot easier and saves a heater winding to use snubbed SS diodes if you ask me !

316a

 

[Eli Duttman]

>>It's a whole lot easier and saves a heater winding to use snubbed SS diodes if you ask me !<<

Not only is it easier; in the case of a bias supply, the instant on behavior of SS diodes is BENEFICIAL. A negative voltage on the grid protects against cathode stripping.

 

[tubetvr]

How to make negative voltage using Tube rectfier?

The easiest way is to connect the positive output of an ordinary rectifier circuit, (using a tube rectifier) to ground and take the negative voltage from the center tap of the transformer...

BR Hans

 

[ohynot]

Thanks Guys

Best Regards,
Ynot