AUDIO VALVES: 5R4GY 5R4GYS CV717 RECTIFIER
These are the latest discovery for audiophile applications with many users claiming a spacious airy sound when compared to the 5U4G The 5R4GY is a high voltage power rectifier and was designed for transmitter use. It has a rating of 180 Watts. The maximum reservoir capacitor is specified at 4 µF and the rectifier needs a series resistance of 250 Ω to limit peak current.
Indeed this lovely rectifier has found usage in such classic esoteric designs as:-
Cary CAD300SE Signature,
Emotive Audio Sira linestage
Woo Audio WA22
World Audio Design 300B PSE,
Here are a few vital statistics for you to match to your requirements.
5R4GY=5V Filament @ 2A,
PIV=2800V @ Imax=150ma,
PIV=2400V @ Imax=175ma,
PIV=2100V @ Imax=250ma
Tube V drop = 67V @ 250mA DC
5R4GY, RCA, BROWN BASE, SMOOTH ANODE, JUNE 1949 PRODUCTION, 0-26 DATE CODE,
6X5GT, BRIMAR, BLACK BASE, WHITE PRINT, 1H8 432, AUGUST 1958 PRODUCTION 6X5
CV717, MILITARY SPECIFICATION, 5R4GY, BRIMAR, STC OLDWAY, 5 RIBBED CHARCOAL PLATE, BROWN BASE WITH WHITE PRINT, MARCH 1965 STC OLDWAY 5R4G