First off; before I get into tube detail I want to describe how my tubes are tested. I test all my tubes with a state of the art tube tester which is a computerized Western Electric - Hickok KS-15874-

 

Rare Marantz 920 Design Speaker Series System floor standing speakers are a perfect example of extreme quality engineering. Visually stunning with a HUGE soundstage they will make a statement in any r

 

lamourie Store Description This is a clean, working Heathkit digital alarm clock purchased in April 1978. It's in great cosmetic condition and works fine (it ran through the test procedure on page 21)

 

This auction is for 6 pcs. of RCA 5R4G full wave rectifier tube- all test excellent on Hickok type 532 tester. No boxes so assume used. Good appearance and good keyways. Great tubes for vintage audio

 

You are looking at the very nice preamp using ECC83(12AX7) tube This was made for using with recorder player so it is included phono stage. Amplier of age is about 20 years, I did test it in my system

 

A 70+ piece lot of assorted type vintage tubes for bid. All are RADIO types! These tubes are used pulls from old radio equipment, medium and large size types. Many different brands; SYLVANIA, GENERAL

 

Set of four NOS Ei 12AX7 ECC83 tubes. NOTE these tubes are from the original Ei plant which was destroyed during the war. These original tubes with smooth plates and pinched bases are VERY rare and ha

 

2 BOSTON ACOUSTIC A-100 VINTAGE SPEAKERS WITH WOOD CABINETS.THE SPEAKERS ARE WORKING .BUT THEY NEED A NEW SPEAKERS' FOAM RINGS.

 

ziypher Store Vintage Vacuum Tubes Create Widget or customize colors. supremeauctiononlinesoftware.widgets.FeedbackWidgetBasic.swf

 

Variable from an AM radio, probably the late 1920s. It is 3-1/4" x 3 1/4" x 2 1/4" H, with the original knob. The plates are close spaced, so it probably exceeds 500 pF. It could use a good cleaning.