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.

Vacuum Tube Hearing Aids: 1921-1953

Pylon Model P Vacuum Tube Hearing Aid

The Pylon Model P vacuum tube hearing aid was manufactured by Park Royal Scientific Instruments Ltd. of London, England in 1945.

The Model P was their first and only hearing aid. It was both popular and low priced.

 The black plastic case measured 3⅜” by 4⅛” by 1⅛”. It contained 3 vacuum tubes. Without the batteries, it weighed 5˝ oz.

The fancy designed round microphone grill is shown upper center.

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Top view of the Pylon Model P showing the off-on/volume control slider switch (center) and the earphone jacks to the right.


 

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The inside of the Pylon Model P showing the battery compartment. The two U10 "A" batteries go one on each side (top left and right) and the 30 volt Eveready No. 430 "B" battery on the bottom.

 

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The inside of the back cover showing the make and model number.

 

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A close-up of the front view of the earphone. The earphone is 2" in diameter.

 

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A close-up of the rear view of the earphone. The 4 letters—PRSI—stand for Park Royal Scientific Instruments

 

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The Pylon Model P in its original box.

 

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The original box for the Pylon Model P.

Here is the 4-page original instruction booklet for the Pylon Model P. The Pylon hearing aids were obviously being sold (and repaired) by T. Hawksley Ltd. of London, England.

Also, apparently this hearing aid was repaired in 1952. Here is the letter from T. Hawksley Ltd. stating what repair work was done, and the receipt showing the cost of repairs as 1 shilling.

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