Tubes tests.
Item Tag: New
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2D21 NOS Amperex radio audio amplifier vacuum tubes 4 valves Germany 5727 2D21W
Tubes tests Price is for all tubes pictured.
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Class A Single Ended EL34 5Z3P Tube Audio Amplifier 13W*2 HIFI Valve Amp DIY Kit
1set Class A Single Ended EL34 5Z3P Tube Audio Amplifier DIY Kit. Tubes used: 2pcs EL34B, 2pcs 6N9P, 1pc 5Z3P. This is only one set kit, you need to assembled by yourself. Enjoy DIY. 5pcs tube sockets.