Way back in the 1980s while
Westinghouse Oceanic Davison in Annapolis, Maryland, an engineer who knew I
had recently obtained a 1941 Crosley Model 03CB console style radio generously gave
me his B&K
Dyna−Quik Model 650 Vacuum Tube Tester. It is a very comprehensive portable
tester used 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. One 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. Note the advertisement claims selling one additional
tube per service call, five times per day would pay for the tester in a few weeks.
Doing the math, that's $1 profit/tube 5 tubes/day x 5 days/week = $25 profit/week.
At $170 for the Dyna-Quik Model 650 Tube Tester, it works out to about seven weeks
- not a bad return on investment (ROI).
B & K Dyna-Quik Tube & Transistor Tester
Cut Testing Time in Half-
Double Tube Sales
Makes Money for Servicemen Everywhere
New Model 650
Fastest, Most Complete, Portable Dynamic Mutual Conductance Tube & Transistor
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. Tests each section of multiple tubes separately
for Gm - Shorts - Grid Emission - Gas Content - and life. Provides instantaneous
Heater Continuity check. Shows tube condition on "Good-Bad" scale and in micro mhos.
Special bridge assures automatic line compensation. 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.
Famous Model 500 Money-Making Portable Dynamic Mutual Conductance Tube Tester
Servicemen say: "Best tube tester I've ever owned for speed and dependability."
"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 micro mhos. 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
New Model 510 Accessory Socket Panel
Adds over 50% more sockets to the B&K Model 500 Dyna-Quik. Enables you to
quick-check many more tube types, old and new. Fits inside the cover of the Model
500. The Model 510 Accessory Socket Panel comes completely wired, ready to install
and connect. Net, $29.95
• Each Dyna-Quik Tube Tester completely tests each tube in seconds
• Eliminates substitution testing
• Shows customer true condition and life expectancy of tubes
• Sells more tubes right on-the-spot
• Cuts servicing time, wins customer confidence
• Saves costly call-backs, brings more profit
One extra tube sale on each of 5 calls a day pays for the Dyna-Quik in a few
Posted March 12, 2020