This auction is for a very desirable pair of Duovac 842 power triode vacuum tubes. This pair is genuine NOS in original factory boxes. As you can see from the photos, the boxes are rather beat up with

 

SCIENCE LAB EQUIPMENT MASS OF ELECTRON APPARATUS . from school auction. very nice. has a National 2BP1 CRT Tube. made in china. everything was pulled from working classrooms. however, I did not test t

 

DATAMATH CALCULATOR MUSEUM sells on eBay Texas Instruments TI Programmable 59 - CAL-Q-TAX Introduced together with the legendary TI-58 these calculators introduced a novelity, the Solid State Software

 

I am now selling my Marantz 2220 stereo receiver as I have gotten a 2270 to replace it. I have been using this receiver and it is working well and looks great. All lamps and meter work well. The unit

 

This auction is for a lot of (8) good used vintage type 12SQ7 triode/dual diode metal can vacuum tubes. All three sections of all of these tubes tested GOOD on a reliable Hickok Model 800A tube tester

 

This auction is for a Ross Mark-400 battery operated reel to reel tape recorder from the 1960's or 70's. This recorder is portable and lightweight (about 3 pounds). It is made to run off (2) C & (

 

UP FOR AUCTION IS A PANASONIC RQ-303 TAPE RECORDER MADE IN JAPAN HAVE ORIGINAL BOX ALSO THE ITEM IS IN REAL NICE SHAPE I DO TAKE RETURNS ONLY ON MISREPRESENTED ITEMS NOT FOR BUYERS REMORSE I DO NOT CL

 

in from an estate.... Sony AM/FM Portable Transistor Radio Matrix Sound System Model MR-9100W Japan. TESTED AND WORKS. the top of antenna missing and bent. has some wear overall, could use q tip clean

 

You are buying: 4 Strong Assorted 6LQ6 / 6JE6C Tubes made in USA Tested at:GE - 100DuMont - 100Sylvania - 100International - 98Minimum of 55 on the Tester. Also tested and worked good in our equipment

 

Here we have 14 RCA 7895 Nuvistor tubes. All test strong between 80 and 120 where 68 is the minimum All tubes test good with no shorts or leakage. Tested on a B&K 707 Dynamic mutual conductance tu