In Reply to: Rectifier choices for 650v HT posted by andy evans on June 28, 2012 at 03:28:19:
Hi Andy,
you have not specified the current you need to draw.
Although I generally prefer an all tube bridge, I don't mind a hybrid bridge either if space is restricted.
6AU4 will surely do nicely (depends on the current you need). In case of a hybrid bridge, I would connect the heaters of the dampers to B+ to ease stress on the heater-cathode insulation.
The hybrid bridge with 6AU4s or other dampers will have a nice slow start up and retain pretthy much all of the tube rectifier characteristics.
If you want some cooler looking rectifiers, you could use a pair of 836. They have indirectly heated cathodes but theye are connected to the filament in the tubes themselves. 1616s would be a DH alternative. But these transmitting type rectifiers have high filament current demands.
Best regards
Thomas
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Follow Ups
- RE: Rectifier choices for 650v HT - Thomas Mayer 02:42:33 06/30/12 (2)
- Current needs... - andy evans 03:08:56 06/30/12 (1)
- RE: Current needs... - Thomas Mayer 03:21:24 06/30/12 (0)