DATAMATH CALCULATOR MUSEUM sells on eBay Texas Instruments TI-54 - NEW-IN-BOX Texas Instruments introduced in 1981 with the TI-54 the first calculator performing complex calculations. The technology i

 

Radofin Model 1710 Calculator I am selling a Radofin Model 1710. The calculator is in good shape. The pen does write. It takes 6 AAA batteries not included to operate.The calculator shown is the one y

 

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

 

Japanese NEC 12AD7 tube. Tests very strong. Plate currents at V(p) = 250V and V(g) = -2.00V Triode 1: 1.41mA Triode 2: 1.45mA Standard worldwide shipping is 5 USD, insured shipping is possible, ask me

 

This vintage mic is in pretty good condition for how ood it is. Some chips in the paint but as you can see in the photos still looks nice. It has the original cable that is still flexible and I can't

 

Lot of 6 RCA stop sign on all tubes designating RCA. New old stock test new on TV-7. Guaranteed not to be DOA (dead on arrival) All 6 tubes have close test results within 5%. Shipping will be $5 in Un

 

Technics by Panasonic Direct Drive Automatic Turntable System SL-1600 with Operating Instruction Manual Purchased about 1978. Worked extremely well until 2010, when I finished replacing all of my musi

 

For sale is a pair of vintage 9 x 15 inch 8 OHM woofers. These came from a RCA console stereo & were tested. There is no visible damage on these speakers. Please check photos & ask any questio

 

The auction is for a Russian triode GM-70 with copper plate. Manufactured in 1981. The tube looks in new condition like never used. . Airmail shipping worldwide usually takes 7 to 10 days if not delay

 

Tascam 22-2 in very good condition.  Everything mechanical works, but I am unable to test the heads.  Cosmetics:  A few small surface scratches, very clean.     VU Meters work, lights in VU meter