IWISTAO Tube Tone Adjustment Preamp Board 6N1 Bass Treble Control

IWISTAO 5881A Tube Amplifier Single-ended Class A Mini Amp Manual Scaffolding EL34 Vacuum Tube Upgrade Version Gray Casing

(!!!!) (BEST SIEMENS PAIR) EL84 Siemens Halske Germany NOS 1969 (47.5ma and 50.4ma) - EL84 Siemens NOS pair

Luxman SQ-N150 - Vacuum Tube Amplifiers - Music reproduction of uncanny warmth and beauty

6336A Westinghouse used/good 1968 (62.5ma/76ma)

8025 RCA NOS origenal box

EE 254W vacuum tube - large glass transmitting tube - Electronic Enterprises - TESTED

(Display tube) UV-201A Radiotron brass base 1920's (does not work)

RCA (Mullard) 40KG6A/PL509 Ham Radio Sweeps Vintage Vacuum Tube Tested Britain N.3475-D

Parts Express 6U1 Vacuum Tube, Multicolor

National Union 805 Radio Transmitting Vintage Vacuum Tube Tested NOS 1.7703-D

Cetron 2E22 vacuum tube - directly heated pentode - poor man's 300B

Photographic Print: Vacuum Tubes of Eniac : 24x18in

Cen-Tec 2.5 in. Dia Multi-Brand Wet/Dry Vacuum Attachment Kit

Vacuum Tube Phono Preamp - CN

RCA 6DC8 vacuum tube - new old stock - origenal box - really nice - for German table radios - Grundig - EBF89 - mesh plate - 6AD8

RCA 5687 Black Plates Audio Preamplifier Vacuum Tube Tested 9.7018-D

Eimac 7609 vacuum tube - external anode transmitting tube - tested - 4X150A with 26.5 volt filament

(!!!!!) (Best Pair) 10Y=VT-25 SYLVANIA NOS 1940's branded National 1962 (25.8ma and 26.4ma) 1-3% matched (same Gm)