This auction is for a lot of 20 vintage used type 50L6 radio tubes (one of the AA5 set). I have tested about half of these tubes with excellent results. They need cleaned. This auction is for the actu

 

This Sharp 8 digit Math student "Thin-Man" scientific calulator with Comprehensive applicaton book is complete. Model EL-509A-T with text. Original box in good condition and interior clear plastic tra

 

Here for sale is a:   Vintage Old Engineering calculator. It is complete and in a  case, my father used one of these to do calculations to create structural steel construction drawings. It appears t

 

Excellent lot of six factory recorded classical vocal reel to reel tapes featuring major orchestras, conductors, soloists and labels. All are 7.5 IPS, have been play tested and have the original inser

 

You are bidding on two 10" TDK metal reels. They were found at an estate sale of a clean, smoke free environment. The reels are in very good condition and the boxes they are in are in good condition a

 

You're looking at a Cunningham CX-345 Tube. This tube tests at 1450 on my TV-10/U where the minimum is 1170. You will get a test sheet with each tube you have purchased. They are being sold in "as-is"

 

HP 65 external charger for Hewlett Packard calculator HP 35 45 55 65 67 I offer an external charger for batteries for the HP35 HP45 HP55 HP65 HP67 HP70 and HP80 calculators in a good condition. Shippi

 

A 12AU7A dual triode, made in the UK by Brimar. Tested for shorts, gas, leakage and Gm on an AVO CT-160. New specs: -8.5V @ 10.5mA, Gm = 2.2 Test results Tube 1 :-9.0V @ 10.5mA, Gm = 2.4 -8.7V @ 10.5m

 

4 Zenith 6K7G Vacuum Tubes RARE Early Style RF & IF Amplifiers These used tubes have been tested for mutual conductance. On my Hickok TV-7 tester they read 56, 61, 62 and 67. A reading of 36 would

 

BJ MONO Tonearm / Pick-up Arm, contains some scratches and oxidation.