NOS RCA 5R4GYB
SKU: rca 5R4GYB
Various labels and boxes including RCA, Motorola, Sylvania, etc. Slightly more sag than a 5U4GB. Great option for amps that call for 5AR4/GZ34s where lower plate voltage, more sag/compression, and earlier breakup are desired. Great in Vox AC 30s to prolong the life of your EL84s.