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RE: 5R4GY and filter cap values

That 47 muF. is too big for all the common 5 V. rectifiers, except the 5AR4/GZ34. Check the data sheets, for yourself.

The forward drop percentage in a 5Y3 is greater than that in a 5R4. Remember, the 67 V. drop in a 5R4 is at its 250 mA. rated max. A 5Y3 is rated for 125 mA. max.

A CL-130 inrush current limiter between the vacuum rectifier and the comparatively large 1st filter cap. might save the day.

Eli D.


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  • RE: 5R4GY and filter cap values - Eli Duttman 08:36:15 03/21/17 (0)

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