4-tube for sale, brand-new and used.

SquareTrade A© AP6.0

22mm Clamp Electronic Retractable Landing Gear Skid DIY Set for RC Multicopter FPVDescription: 22mm Clamp Electronic Retractable Landing Gear Skid DIY Set for RC Multicopter FPV Features: - Upgrade part, 6mm main shaft, with out of control protection - Tube clamp: 22mm - Work voltage: 7.4-26V - Suit for 4.5kg or below weight RC Multicopters FPV - Part includes two set of electronic rod part, controller board and carbon fiber tube

The Radiation Alert® Sentry EC is a Personal Alarming Dosimeter / Ratemeter designed to ensure the safety of personnel that work in occupations with potential x-ray or gamma exposure. The pocket sized unit has an energy compensated tube for a linear response to gamma and built in memory for recording data points for tracking accumulated exposure. The SentryCom Software option enables you to generate incident reconstruction for analysis.

Inspector USB Handheld Digital Radiation Alert® DetectorThe Inspector and Inspector Plus are now The Inspector USB!! Now with USB and the included Observer USB Software, you can download your data from the internal memory, set computer alarms, and calibrate your instrument!

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This is a Vintage 1930s - 40s Supreme Model 89D Deluxe Tube Tester in Box. It is in Like New Condition on the inside with a couple of scratches on the outside top of the case & the bottom several (see pics). I am selling as is & untested.

Jackson Model 648S Tube Tester, excellent condition. Although not as common as the B&K or Hickok testers, this is a very well made and documented unit. Full manual and service information book (including calibration) is available on Ebay (NOT included with this auction).

Tube tester comes with shown paperwork. Unit has been sitting unused for the last 10 years in air-conditioned storage. I tested 2 tubes and compared results with another tube tester, the results were accurate.

Tube tester comes with all shown accessories & paperwork. Unit has been sitting unused for the last 10 years in air-conditioned storage. I tested 2 tubes and compared results with another tube tester, the results were accurate.

Here is a mutual conductance tester you can be proud of and count on for decades to come, a beautiful refubished, calibrated, and improved B&K 707. This one was from Glendale Union High School, Phoenix, AZ and has not seen much use - a great thing! Very well preserved and super clean from that dry climate.

The EICO Model 666 Dynamic Conductance Tube & Trans. able to test both tubes and transistors. Among its advantages are rapid and simple operation, close simulation of actual tube operating conditions, and unexcelled thoroughness and accuracy of test.

TYPE: Mutual Conductance Dynamic Tube Tester MAKE/MODEL: B&K Model 700 FEATURES INCLUDE: but are NOT limited to the following: CHECKS 4, 5, 6, & 7 pin large, regular and mini, octal, including many AUDIO & RF tubes, various filament voltages, tube chart + MORE! INCLUDES: (1)B&K Model 700 with AC Cord (2) DYNA-QUICK Tube Testing Chart (3) tube plate cap wire with connector. IN GOOD WORKING CONDITION.

US-ARMY I-177-B Vacuum Tube Tester Features: True Mutual Conductance Tube Tester Manufactured for US-Army circa late 1940s- early 1950s Tests amplifier tubes on Good/Reject Quality scale and for Mutual Conductance (Gm) in three ranges 3000, 6000 and 15000 uMhos Capable of testing Vintage "antique" vacuum tubes of 40s era. I tested one tube. The unit turns on.

WIORKING Weston 744-4 Commercial

You are bidding on a vintage Supreme model 85 vacuum tube tester for antique radios. Very nice looking vintage 1935 Supreme 85 tube tester. This is the early version, with the round meter instead of the fan-shaped meters Supreme used on later testers.

***DESCRIPTION*** Here's a decent Hickok 600A tube tester I have used for several years testing only some simple guitar-amp tubes: 6L6, 12AX7, 12AU7's.... etc. I'm only selling it because I recently bought a calibrated 539C tester.

Jackson Dynamic Plate Conductance Tube Tester, model # 648. Works great and is very clean. Comes with factory operating instructions, and a copy of special tube test set up data manual.