A French made tube tester for both American and European tubes since 1950.Voltage selector 110-245v 50Hz. Dimensions H450 - 340 - D165.
Weight 7Kg

It was made in Canada by Stark Electronics Instruments.The TV-7 series are built like tanks and seems to me, to be one of the best designed tube testers ever made. They are based on a Hickok design and are great for testing real old tubes prior to WWII. It will test many, but not all, tubes made after WWII.

WestonModel 981-3 Tube Tester.
High quality components with welded steel case Tests for Mutual Conductance (Gm), Shorts, and Tube LifeTests both sections of dual section tubes without resetting selectors Seven Plate & Screen voltages up to 225 VDC and Bias voltages to -20 VDC. Four grid signals at 4000 Hz. Nice, smooth built-in roll chart6L6GC under test in pictures 4 & 5 = 2000 X 3 = 6000 micromhos. Nice case--almost mint

Specifications of AVO CT 160

Tests Filament, Insulation, cathode/heater leakage resistance to 25M ohms, gas, current draw, mutual conductance.
Bases British 4/5/7/9 pin (B4/B5/B7/B7A/B9), P type base (8SC), International Octal, Mazda Octal, UX4, UX5, UX6, UX7, American SM7, American loctal (B8B or B8G), B9D, B8D, Hivac 4 pin (SM4), Hivac 5 pin (SM5), B7G (miniature), B9A (noval), B3G, 5AA and 7AA for Acorn valves, F8, B8A, B5A.
Two uncommitted clips which can be connected to top cap or side cap connections.
Mains Selectable 105-120 in 5V steps, 175-250 in 5V steps @ 50-500Hz. AC.
Heater 0.625, 1.25, 1.4, 2.0, 2.5, 3.0, 4.0, 4.5, 5.0, 5.7, 6.3, 7.5, 10, 11, 12.6, 13, 15, 16, 18, 20, 23, 25, 28, 30, 35, 40, 45, 48, 55, 70, 80, 117
Anode 20, 40, 60, 75, 90, 100, 150, 200, 250, 300, 400
Screen 20, 40, 60, 75, 90, 100, 125, 150, 200, 250, 300
Grid Continuously variable from 0 to -40V.
Other Measures anode current up to 100mA, gm from 0-20mA/Vm, diode/rectifier efficiency, short circuit protected.
Weight 25 lbs

INTERESTING PAGES (not completed)

It's very big number of Amateur Radio sites

Amateur Radio
an introduction on Amateur Radio

 in pics:

some sites

RCA's Amazing AR-88 Receivers

BIG Antennas

U.S. Communications Equipment WW2

German vintage equipment WW2 and more


My beautiful Tube testers
After long time i deside to pick up from my basement sorage my Tubetesters .
So i have to make some cleaning and restoration on them .
until then have some view of them.
I have to make some changes on old caps and resistors as well on soldered components.
Enjoy them.
One British one French and two from the States. There is no manual from AVO.

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