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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: Actually 5r4g is not the "same" as 5ar4 posted by DAK on October 30, 2016 at 15:42:24:
The differences between the 5AR4/GZ34 and the 5R4 are very substantial. About the only things the 2 types have in common is the 2 A. filament current draw and a 250 mA. B+ capability.
Forward drop in a 5AR4 is comparatively small, while it is a whopping 67 V. @ 250 mA. in a 5R4.
The 5AR4 tolerates substantial capacitance, at the PSU filter's I/P. The 5R4 is not nearly as tolerant of I/P filter capacitance.
The direct, as opposed to indirect, heating has already been mentioned.
The PIV rating of the 5R4 is greater than that of the 5AR4.
Don't let greedy and/or non-knowledgeable sellers take your hard earned money.
Eli D.
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Follow Ups
- RE: Actually 5r4g is not the "same" as 5ar4 - Eli Duttman 17:14:14 10/30/16 (3)
- RE: The seller is certainly "knowledgable" - DAK 18:26:54 10/30/16 (0)
- RE: Actually 5r4g is not the "same" as 5ar4 - FenderLover 18:13:59 10/30/16 (1)
- Outstanding! Very helpful. Thank you very much! (Nt.) - Winston Smith 19:46:28 10/30/16 (0)
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