I'm building a preamp, and looking at rectifier options. Before I ask anything, this will use a dedicated VPL12-4000 filament transformer that I can tie to the HV B+ for safer heater to cathode potential.
I need a full wave bridge. I was looking at the 6BY5 with a pair of SS diodes for a hybrid bridge. I'd love to use two 6BY5s, but I would have to leave the filaments ungrounded to do so. Or, I suppose I could leave the filaments untied from the B+ and elevate them for both tubes?
The other option I'm looking at is the 6 or 12AX4. I love the aesthetic concept of seeing the four diodes lit up for a bridge, but I am curious if there are any drawbacks to using full wave bridges with tubes minus the lifespan.
Any weight in either direction if you had to select one?
Thanks!
I need a full wave bridge. I was looking at the 6BY5 with a pair of SS diodes for a hybrid bridge. I'd love to use two 6BY5s, but I would have to leave the filaments ungrounded to do so. Or, I suppose I could leave the filaments untied from the B+ and elevate them for both tubes?
The other option I'm looking at is the 6 or 12AX4. I love the aesthetic concept of seeing the four diodes lit up for a bridge, but I am curious if there are any drawbacks to using full wave bridges with tubes minus the lifespan.
Any weight in either direction if you had to select one?
Thanks!
Using 2 6BY5s requires 2 separate filament trafos.
You have the (IMO) right idea in going for a hybrid bridge. There's no double forward drop penalty and 1 filament trafo is "all she wrote". 😀
You said preamp. Therefore, the B+ rail voltage can't be very "tall". While the vacuum diodes are darned good at suppressing SS diode switching noise, not generating the noise must be better. 2X Cree C3D02060F 2 A./600 PIV Schottky diodes will finish the bridge very nicely.
You have the (IMO) right idea in going for a hybrid bridge. There's no double forward drop penalty and 1 filament trafo is "all she wrote". 😀
You said preamp. Therefore, the B+ rail voltage can't be very "tall". While the vacuum diodes are darned good at suppressing SS diode switching noise, not generating the noise must be better. 2X Cree C3D02060F 2 A./600 PIV Schottky diodes will finish the bridge very nicely.
Thanks!
Odd question, but is there harm in paralleling 6BY5s? I've got an extra hole, so that would help.
Also, I need to float the filaments on these because of the heater cathode tolerance. 1/4 B+ is OK here as long as it is not attached to B+?
Odd question, but is there harm in paralleling 6BY5s? I've got an extra hole, so that would help.
Also, I need to float the filaments on these because of the heater cathode tolerance. 1/4 B+ is OK here as long as it is not attached to B+?
- Status
- Not open for further replies.