Hickok Model 18 Signal Generator (1939)
This Hickok Model 18 Signal Generator is the prettiest piece of test
gear that I own. My RCA Chanalyst runs
a close second.
I got it for a great price. At a swap meet, I was buying a
vintage oscilloscope from a fellow collector, when he said, "Would you also like
this one for free?"
Who could say no? The generator was in like-new condition. The owner had even
replaced a ratty old leather handle with a new one.
The cabinet is finished with a lustrous deep blue paint, and the controls and
marking are stylish.
At the top, you see two horizontal drum-type dials. The left dial is
a decibel meter and the right one displays output frequencies in six bands,
labeled A-F.
The generator employs four tubes.
Tube |
Type |
Function |
V1 |
6J7 |
Main oscillator |
V2 |
6C6 |
Negative oscillator |
V3 |
6K7 |
Mixer |
V4 |
1V |
Rectifier |
Like all Hickok products, it is well built.
The coils are wound on expensive ceramic forms and the
construction details are impeccable. (One tube has been removed
in this photo.)
I also have the original manual, which is detailed and quite technical, giving
the theory of operation as well as operating instructions. You can download the free
Model 17/18 manual
from Steven Johnson's Antique Technology website.
That site also has the Hickok 1939 catalog
showing the Model 18 priced at $54.
I haven't restored this generator, so I haven't used it except for making
some initial tests.
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