Littelfuse 034404X Portafusibili Soffiati Indicatori Montaggio a Pannello per 3AG, 3AB
Littlefuse P/N 03440404X. Blown Fuse Indicating Holders for 3AG and 3AB 1/4" x 1-1/4" Fuses. Neon lamp glows when fuse is blown! of fractional amperage fuses and the parallel resistance of the indicator lamp and its resistor (47K in this case).