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Old 21st March 2015, 12:29 AM   #1
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Default Question on Tube Rectifier..help please.

will a tube rectifier pass dc ....ie i would like to pass output from a full wave bridge thro a 6x4/ex90. Will it work ? Please dont respond with why.

thanks ever so much in advance

bill
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Old 21st March 2015, 12:41 AM   #2
kevinkr is offline kevinkr  United States
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Yes
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Old 21st March 2015, 12:58 AM   #3
rayma is offline rayma  United States
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Originally Posted by STUDIOPLEX View Post
will a tube rectifier pass dc ....ie i would like to pass output from a full wave bridge thro a 6x4
That's what they do, and this is fine for a soft start, but the filament still must be referred to the cathode.
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Old 21st March 2015, 01:03 AM   #4
kevinkr is offline kevinkr  United States
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@ Rayma the 6X4 is indirectly heated and does not need a cathode to filament connection. (Designed for large positive cathode to filament differential) It was commonly used in applications where the filament supply was common with other 6.3V filaments. (Like tuners, small pre-amps and very small amps)

@Studioplex I hope this helps. Wire as you proposed.
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Old 21st March 2015, 01:09 AM   #5
rayma is offline rayma  United States
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Originally Posted by kevinkr View Post
@ Rayma the 6X4 is indirectly heated and does not need a cathode to filament connection.
(Designed for large positive cathode to filament differential)
Yes, I remember now that's indeed the case.
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Old 21st March 2015, 04:19 AM   #6
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ok thanks I need more voltage than i would get half wave so though full wave bridge into the tube rectifier would raise just put positive on both anodes. I want the sag. etc
thanks guys
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Old 21st March 2015, 05:46 AM   #7
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Originally Posted by STUDIOPLEX View Post
ok thanks I need more voltage than i would get half wave so though full wave bridge into the tube rectifier would raise just put positive on both anodes. I want the sag. etc
thanks guys
So, you are bridge rectifying an untapped winding. There is no need to use both a 4 SS diode bridge and the vacuum rectifier. Construct a hybrid bridge, with 2X UF4007s forming the connection to ground and the tube forming the connection to the B+ filter.
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Old 21st March 2015, 12:09 PM   #8
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google Graetz bridge.
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