Tube-Town Forum
Technik => Tech-Talk VOX => Thema gestartet von: bi7340aa am 26.11.2023 11:32
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Hi all!
Does any of the forum members have experience replacing the rectifier on a 5U4G?
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Voltages will be a bit lower.
I'd recommend to stay with the GZ34. Add rectifier diodes in series (1n4007 or better), and never use the standby switch. Leave it on or remove it completely.
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Not a good idea to use a 5U4G in an AC30.
Heater current of 5U4G is 3A, GZ34 is 1.9A.
So the 5V heater winding will overheat.
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Thanks, I know that the filament current 5U4 is 3 A.
But I don’t know what current the 5V winding is designed for...
The transformer for AC30 from Inmаdout, for example, is rated at 3A...
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But I don’t know what current the 5V winding is designed for...
I don't know either, but it seems unlikely that the original Vox PT could safely handle a 60% increased current.
Another benefit of the GZ34 is its delayed heat-up, resulting in delayed ramp-up of B+.
This saves tube life.
Why don't you want to use the GZ34?
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My 5AR4 is dead and there is no replacement. But my friend offered help in the form of 5U4)))
I have already ordered a new 5AR4, so the issue can be considered resolved.
I thank everyone who cares! :bier:
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I guess you know that 5AR4 is just the american name for a GZ34?
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Yes, sure. Thank you :topjob: