Hugh Hetherington Hearing Aid Museum
Hugh Hetherington Hearing Aid Museum

The Hearing Aid Museum

Hearing Aids of all types—Ear Trumpets, Carbon Hearing Aids, Vacuum Tube Hearing Aids, Transistor Hearing Aids, Body Hearing Aids, Eyeglass Hearing Aids and much more!

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Click on the "General Information" button (top button above) for an overview and general information on this category of hearing aid.

 

Body Type Transistor Hearing Aids

Zenith "Crusader" [Mod I] Transistor (Body) Hearing Aid

The Zenith "Crusader" [Mod I] Transistor Hearing Aid was manufactured by the Hearing Aid Division of the Zenith Radio Corp. beginning in August, 1958. It was an 4-transistor aid.

The difference between the Zenith "Crusader" (previous page) and the "Crusader [Mod I] is that the Mod I had an external clip-in microphone like the "Crusader X" (not shown).

The Zenith "Crusader" [Mod I] measured 2" x 1⅜" x ⅝" thick (1" thick with plug-in microphone), and weighed 1˝ oz. with battery. The case was  gold-colored anodized aluminum.

The picture at the right shows the earlier version of the Zenith "Crusader" [Mod I] with the microphone (right) attached to the external microphone cord.

The "Crusader" [Mod I]  had the word "ZENITH" centered across the bottom (as shown), exactly like the original "Crusader" had.

 

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Top view of an earlier version of the Zenith "Crusader" [Mod I] showing the 1 to 7 volume control/on-off switch (top front right). The 4-position tone control (top front left) is labeled "H" (high), "M" (mid), "L" (low) and "F" (full) . The receiver cord jack is in the center (rear).

The earlier versions of the Mod I had black-colored controls with yellow letters and numbers on them.

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 In contrast, later versions of the Zenith "Crusader" Mod I and all versions of the Mod II had cream-colored controls with black letters and numbers on them.

The serial number of the above earlier version of the "Crusader" Mod I hearing aid is 705,178. The serial number of the later version of the "Crusader" Mod I (shown on the right) is much higher, namely 4,106,504.

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Rear view of the earlier version of the "Crusader" [Mod I] showing the battery door which swung up from the bottom of the case revealing the battery compartment (bottom). The Zenith "Crusader" [Mod I] took an "N" size 1.4 volt No. 401 mercury battery.

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Front view of the earlier version of the Zenith "Crusader" [Mod I] showing the unusual clip-on microphone. (The "Crusader" [Mod I] did not have a built-in microphone.)

This way the microphone could be attached to the hearing aid (as shown) or removed and attached to the clothing while the hearing aid itself was "hidden" in a pocket.

The microphone ports are the two holes, one on each side of the Zenith crest.

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Front view of the earlier version of the Zenith "Crusader" [Mod I] showing the clip-on microphone removed revealing the two microphone jacks (black circles). Notice the long sharp prongs on the microphone so it could pierce thick clothing easily.

 

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Front view of the earlier version of the Zenith "Crusader" [Mod I] showing the plug of the microphone cord that could be plugged in in place of the microphone itself.

 

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Other end of the earlier version of the Zenith "Crusader" [Mod I] microphone cord showing the two jacks (right side top and bottom of the white plug) and the bottom of the microphone (bottom right).

 

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The microphone of the earlier version of the Zenith "Crusader" [Mod I] shown plugged into the remote microphone cord.

 

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Front view of the later version of the Zenith "Crusader" [Mod I] showing the external microphone plugged in.

Notice the different design on the front—a crown at the top and the diamond-shaped microphone port centered on the lower front.

 

 

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Close-up of the upper left corner of the external microphone of the later version of the Zenith "Crusader" [Mod I]. Notice that this external microphone also has a t-coil in the case as evidenced by the "T" t-coil and "M" microphone switch (shown in the "T" position.

 

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Rear view of the earlier version of the Zenith "Crusader" [Mod I] hearing aid. Engraved into the back it reads "Zenith", "Crusader" and "the royalty of hearing".

In the top left corner is engraved the word "VOLUME", and in the top right corner the word "TONE".

The serial number on the battery door is 0705178.

 

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Rear view of the later version of the Zenith "Crusader" [Mod I] hearing aid. It is the same on the back except for a much higher serial number.

The serial number on the battery door of this later Mod I model is 4106504.

 

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View of the earlier version of the Zenith "Crusader" [Mod I] in its original case.
 

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Top view of the carrying case of the earlier version of the Zenith "Crusader" [Mod I].

 

 

 

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