Eico 666

eBay

Eico Model 666 Dynamic Conductance Tube Transistor Tester w/ manuals los angeles $75 Nov 27, 2025

eBay

vintage Eico 666 tube tester tube data set up manual $25 Nov 7, 2025

eBay

RCA 12SA7 GT Vacuum Tube * EICO Model 666 Tested $15 Sep 22, 2025

eBay

5 6CG7 Vintage Vacuum Tubes - Mixed Lot - Tested on EICO 666 $40 Sep 6, 2025

eBay

6FQ7 6CG7 Vacuum Tubes - Tested on EICO 666 - 6 Total Tubes In Auction $40 Sep 6, 2025

eBay

Six (6) Sylvania 6CG7 6FQ7 Vacuum Tubes - Tested on EICO 666 - See Photos $55 Sep 6, 2025

eBay

Capehart 5Y3GT Vacuum Tube * EICO 666 Tested $18 Aug 28, 2025

eBay

Sylvania JAN CHS 6SJ7 WGT Vacuum Tube * EICO 666 Tested $19 Aug 27, 2025

eBay

Raytheon 6X5 GT Vacuum Tube EICO 666 Tested $16 Aug 27, 2025

eBay

Sylvania 6X5 GT Vacuum Tube * Tested on EICO 666 $15 Aug 27, 2025

eBay

RCA Radiotron 6X5 GT/G Vacuum Tube * EICO 666 Tested Good $12 Aug 27, 2025

eBay

(7) 5Y3 GT RCA Black Plate Vacuum Tubes * EICO 666 Tested $43 Aug 27, 2025

eBay

Sylvania JAN CHS 5Y3WGT Audio Radio Receiver Vacuum Tube Tested On EICO 666 $15 Aug 27, 2025

eBay

Philco 5Y3GT Vacuum Tube * Tested Good on EICO 666 $12 Aug 27, 2025

eBay

2 GE 6005 6AQ5 Vacuum Tubes Results * EICO 666 Tested $22 Aug 27, 2025

eBay

6CG7 6FQ7 Sylvania Gray Plate Vacuum Tube * EICO 666 Tested $17 Aug 27, 2025

eBay

Sylvania 5Y4GA Full Wave Rectifier Vacuum Tube * EICO 666 Tested $15 Aug 24, 2025

eBay

Magnavox 6DA4 Vacuum Tube - Tested on EICO 666 $10 Aug 23, 2025

eBay

RCA 6N7 GT/G VACUUM TUBE TESTED on EICO 666 $12 Aug 23, 2025

eBay

6V6 GT Lot (Qty 5), Mixed Construction, Vacuum Tubes * EICO 666 Tested $65 Aug 22, 2025

eBay

Emerson 12SK7GT Vacuum Tube * EICO 666 Tested $21 Aug 21, 2025

eBay

National Union JAN-6H6GT Vacuum Tube - TESTED on EICO 666 $14 Aug 21, 2025

eBay

Röhrenprüfgerät EICO 666 €450 Aug 21, 2025
- Dec 4, 2025

eBay

Remington 6F5G Tube - EICO 666 Tested - See Photos $26 Aug 20, 2025

eBay

Raytheon Electron Tube 6J5WGT * Tested on EICO 666 * Jan-CRP-6J5WGT $25 Aug 20, 2025

eBay

RCA Victor Vacuum Tube * 6BG6G * 6-52 * EICO 666 Tested $20 Aug 19, 2025

eBay

6G6 TUBE RCA TESTED on EICO 666 $16 Aug 18, 2025

eBay

Silvertone 227 Tube * Engraved Base * Tested on EICO 666 * $14 Aug 16, 2025

eBay

Eico Dynamic Conductance Tube & Transistor 666 Instruction Vintage Manuals Book $19 Jan 7, 2025

eBay

9 TUBES 6SG7 6SK7 6SQ7 6Y6GT DUAL DIODE TRIODE PENTODE 8 PIN EICO 666 GOOD USED $30 Aug 25, 2022

eBay

SEVEN RECTIFIER PENTODE 8 PIN TESTED EICO 666 25B6 25L6 25Z6 35Z4 USED $22 Aug 25, 2022