B & K Manufacturing Company - 747 - Valve characteristic meter
Manufacturer:
Image 1 of 2
If you have any other photos or manuals for the
B & K Manufacturing Company 747
you can
upload the files here.
Equipment:
747
Date:
Category:
Group:
Sub Group:
Information
FEATURES
VERSATILITY—The Dyna-Jet Model 747 tube tester checks over
99% of all vacuum tubes in general use in television
receivers, radios, and audio equipment. Over 2500 tube types
are listed in the tube chart.
FAST “JET-CHECK” TESTING —Most of the popular television and
radio tubes can be checked on the “Jet-Check” section, which
requires setting only the HEATER and SENSITIVITY controls
before testing can begin.
PROGRAMMED TESTING—All tube types which cannot be tested in
the “Jet-Check” section can be given the same type tests in
a separate programmed section. A program switch for each pin
of the tube sets up the test circuit. Such programmed
testing means the instrument is obsolescence proof; all new
tube types that are introduced can be tested.
DYNAMIC TESTING—Amplifying tubes in either the “Jet-Check”
or programmed section are given a true dynamic mutual
conductance (Gm) test. Diodes and rectifiers are tested for
emission. Test results are reliable, even for high voltage
regulators. A large, easy-to-read BAD—?—GOOD meter displays
the test results.
HIGH VOLTAGE REGULATORS—A special dynamic test has been
designed into the Model 747 to properly test high voltage
regulator tubes with proper plate current. Some competitive
testers destroy tubes with a high current emission test,
while others test with insufficient current which results in
all tubes testing good. This special dynamic test injects a
signal voltage to the grid and another much higher voltage
applied to the plate. After extensive set testing and
circuit design we now have a test that separates the good
tubes from the bad.
SHORTS TEST—A single pushbutton shorts test checks shorts or
leakage between elements. Leakage paths up to 1 megohm will
light the SHORTS lamp, and leakage as low as y% microampere
can be detected on the meter.
GRID EMISSION TEST—A single pushbutton test checks gas, grid
emission, or grid-to-cathode leakage by a sensitive grid
current check. Grid leakage paths of 100 megohms can be
easily detected on the meter.
LIFE TEST—A single slide switch checks life expectancy by
dropping heater and operating voltages 10% to determine the
tube’s reserve capacity.
DUAL SECTION TUBE TESTING—Each section of a dual section
tube is tested separately. Therefore, tubes with identical
sections can be checked and selected for balance between
sections. This is convenient for selecting dual section
tubes to be used in push-pull circuits.
TUBE CHART—The tube chart is an integral part of the tester.
It lists all set-up instructions for testing each tube type.
Pages are indexed for ease and speed in locating tube types.
Over 2500 listings cover nearly all tube types available.
Additions are published regulary to add the newest tube types.
VOLTAGE REGULATED—Compensation for line voltage variations
gives highly reliable test readings at all times.
PORTABILITY—The rugged, easy to carry case, which is made of
molded plastic, allows the tester to be carried into the
home on service calls, or used on the bench.
PIN STRAIGHTENERS—Five built-in pin straighteners
accommodate all tube types with flexible pins.
3 Manuals
User manual
Manual type:
User manual
Pages:
31
Size:
1.9 MB
Language:
english
Revision:
Manual-ID:
485-115-9-001
Date:
Quality:
Scanned document, all readable.
Upload date:
Aug. 6, 2018
MD5:
d8d10ff2-c921-1480-8c30-afa080c5570f
Downloads:
228
Schematics and partlist
Manual type:
Schematics and partlist
Pages:
3
Size:
157.5 KB
Language:
english
Revision:
Manual-ID:
Date:
January 1971
Quality:
Scanned document, all readable.
Upload date:
Aug. 6, 2018
MD5:
24542887-a6ac-0961-80b8-da1bae59c955
Downloads:
198
User manual
Manual type:
User manual
Pages:
61
Size:
15.9 MB
Language:
english
Revision:
Manual-ID:
Date:
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
Aug. 7, 2018
MD5:
666d400e-fd83-b183-4053-1939efdfc7d9
Downloads:
352