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)
Amateur Radio
an introduction on Amateur Radio
http://www.arrl.org/what-is-ham-radio
http://www.arrl.org/what-is-ham-radio
in pics:https://www.google.gr/search?q=HAM+Radio&tbm=isch&tbo=u&source=univ&sa=X&ei=4KCCUsfwF7HM0AXr6IDIAw&ved=0CDsQsAQ&biw=1280&bih=887
some sites
http://www.radioera.com/radioera.root/shop/
http://www.k5og.com/index.html
http://www.arizona-am.net/TUCSON/AL0F/al0f.html
http://www.laud.no/la6nca/
http://www.agder.net/la8ak/e.htm
EME
http://www.hamradionews.net/2012/06/sv1btr-eme-array.html
AM
http://www.arizona-am.net/
COLLINS
http://www.radioera.com/ham_radio.htm
DRAKE
http://www.ea1ddo.es/drake.html
http://www.homer.se/radio/drake.php
http://www.radiophile.com/tr3-tr4.htm
Hallicrafters
http://www.radioblvd.com/SX28Notes.html
RCA's Amazing AR-88 Receivers
http://www.radioblvd.com/ar88.htm
BIG Antennas
http://www.qsl.net/f4azf/antennes/antennes.htm
U.S. Communications Equipment WW2
http://www.radioblvd.com/WWII-PostWar%20Hamgear.htm
German vintage equipment WW2 and more
http://home.versatel.nl/gmwzijlstra-prummel/
http://www.laud.no/la6nca/staaland/
http://www.laud.no/ww2/index.htm
http://www.agder.net/la8ak/e.htm
Magazines
http://www.dxzone.com/catalog/Publications/Magazines/
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.
