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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: RE: Google'd site posted by Tre' on March 27, 2016 at 19:27:36:
The 6X5 and other 6V IDH rectifiers were designed to operate off the same filament supply as other 6V tubes in the circuit. Therefore it possessed designed-in h-k insulation capable of withstanding a typical B+ of roughly 300V. In most circuit designs of the era the 6X5 came from, the cathodes of the other tubes would be grounded either directly or thru a relatively low value resistor. The filament circuit of these tubes was also usually referenced to ground thru a center tap or by grounding one leg. If the 6X5 develops an h-k leak, B+ will be shunted to ground theu the heater circuit. If the filament supply is floating, a 6X5 h-k leak will raise the filament circuit to B+ level thus far exceeding the h-k voltage rating of the other tubes. Either case leads to circuit failure, sometimes catastrophic. Bottom line is that a 6X5 is defective if there is an h-k leak and shouldn't be used.
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Follow Ups
- RE: Google'd site - Steve O 20:02:31 03/27/16 (2)
- RE: Google'd site - Tre' 20:37:48 03/27/16 (1)
- Not dangerous at all if the rectifier h-k ratings are respected... - Steve O 21:41:39 03/27/16 (0)
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