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Eico 635

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eBay

Vintage Sylvania 6KM6 Vintage Sweep Tube - Tested Eico 635 Superb $18 Oct 21, 2025

eBay

RCA 6JB6 VINTAGE SWEEP POWER TUBE - TESTED EICO 635 STRONG $10 Sep 14, 2025

eBay

Rare Original EICO Portable Tube Tester Model 635 Assembly Manual w/ MANY EXTRAS $65 Sep 14, 2024

eBay

EICO Operating Instructions & Tube Data For Model 635 Tube Tester 56E38 $59 May 19, 2024

eBay

EICO Model 635 Operating Instructions Vintage Booklet 20D65 $89 Dec 24, 2023

eBay

SEVEN RECTIFIER PENTODE 8 PIN TESTED EICO 666 25B6 25L6 25Z6 35Z4 USED $22 Aug 25, 2022
- Dec 5, 2025

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