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November 1957 Radio-Electronics
 [Table of Contents]
Wax nostalgic about and learn from the history of early electronics.
See articles from Radio-Electronics,
published 1930-1988. All copyrights hereby acknowledged.
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As mentioned a while
back, in the 1980s while
working at
Westinghouse Oceanic Davison in Annapolis, Maryland, an engineer who worked
for knew I
had recently obtained a
1941 Crosley Model 03CB console style radio.
He generously gave
me his B&K
Dyna-Quik Model 650 Vacuum Tube Tester which, although formerly a very
active Amateur radio operator (since boyhood), he didn't need it anymore. The
Model 650 is a very comprehensive portable
tester used at one time by many professional radio and television servicemen. My tester also
had the Model 510 Accessory Socket Panel that added an ability to test 50% more
tube types. An indication that it is one of the later model tube testers is the
inclusion of a transistor testing socket. Unlike testing vacuum tubes, all of
which plugged into sockets to make them easily replaceable, testing a transistor
or solid state diode required unsoldering or clipping the device out of the
circuit and then soldering back in either the verified still good device or a
replacement. It was one of the reasons electronics servicing people eschewed the
adoption of semiconductors. That, and a lot of money was made by the sales of
replacement tubes, with a typical profit of a dollar or so per tube. The
$169.95 price in 1957 is the equivalent of about $1,720 in 2022.
B&K Dyna-Quik Tube Tester Ad
 Make More Money Faster with B&K Laboratory-Accurate Dyna-Quik
Cut Testing Time in Half - Double Tube Sales
Measures true dynamic mutual conductance with laboratory accuracy under actual
operating conditions right in the home. Makes complete tube test in seconds. Quickly
detects weak or inoperative tubes. Shows customer the true condition and life expectancy
of the tubes and sells more tubes right on the spot. Cuts servicing time, saves
costly call-backs, wins customer confidence, and brings more profit. One extra tube
sale on each of 5 calls a day pays for the Dyna-Quik in a few weeks.
See your B & K Distributor, or write for Bulletin 500-650-E
New Model 650
Today's Fastest, Most Complete, Portable
Dynamic Mutual Conductance Tube & Transistor Tester
Offers New Features-More Features! Checks over 99% of the tubes most widely used
in television receivers, plus popular home and portable radio tubes. Tests over
500 tube types. Lists over 125 tube types, with settings, on socket panels for maximum
operating speed. Complete listing in fast telephone-index type selector. Includes
16 spare sockets and sufficient filament voltages for future new tube types. Phosphor
bronze socket contacts. Tests each section of multiple tubes separately for Gm-Shorts-Grid
Emission-Gas Content-and Life. Gives instantaneous Heater Continuity check. Shows
tube condition on "Good-Bad" scale and in micromhos. Special bridge assures automatic
line compensation. Simple to operate. No multiple switching-No roll chart. Includes
pin straighteners. Transistor Tester checks junction, point contact and barrier
transistors, germanium and silicon diodes, selenium and silicon rectifiers. Net,
$169.95
Famous Model 500
World's Fastest Selling Portable
Dynamic Mutual Conductance Tube Tester
This is the B & K quick-check tube tester that has revolutionized TV set
servicing! Servicemen* say: "Best tube tester I've ever owned for speed and dependability!"
"Wonderful instrument. Makes money!" "Paid for itself several times. Really indispensable!"
"Have two ... one for the shop and one for house calls!" "Adds income and saves
unprofitable call-backs!" That is why thousands of the Model 500 are now in profitable
use all over the nation. Tests tubes for Shorts, Grid Emission, Gas Content, Leakage,
and Dynamic Mutual Conductance - in a matter of seconds. Life Test detects tubes
with short life expectancy. Shows tube condition on "Good-Bad" scale and in micromhos.
One switch tests everything. No multiple switching-No roll chart. Special bridge
maintains automatic line compensation. 7-pin and 9-pin straighteners.
Net, $109.95
B & K Manufacturing Co.
3726 N. Southport Ave. • Chicago 13, Illinois
Canada: Atlas Radio Corp. 50 Wingold, Toronto 10, Ont.
Export: Empire Exporters, 439 Broadway, New York 13, N. Y.
* Names on request
Posted April 22, 2022
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