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!

FREESubscriptionto:
Hearing Loss Help
The premier e-zine for people with hearing loss

Your email address
will never be
rented, traded or sold!

Your First Name:

Your E-mail:

General Info

Non-Electric

Carbon

Vacuum Tube

Transistor (Body)

Transistor (Ear)

Cochlear Implants

Miscellaneous

For Sale

Search this site:

Results per
page

all words

any words

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

Assistive Listening Devices (ALDs)

Williams Sound PPA R7 Four-Channel FM Receiver

The Williams Sound PPA R7 4-channel FM receiver was produced by the Williams Sound Corporation of Eden Prairie, MN around 1985.

It was a small battery-operated transistorized portable FM receiver.

The PPA R7 measured 3 9/16" x 2⅜" x 15/16" (9.1 x 6.1 x 2.4 cm) and weighed 2.4 oz (68 g) without the battery.

PPA stands for Personal Public Address. The PPA receivers were used with a higher-powered FM transmitter for use in churches and meetings.

This FM system had a range of several hundred feet and operated in the 72 - 76 mHz band.

Click picture for larger view

Top view of the Williams Sound PPA R7 4-channel FM receiver showing the earphone jack (left), the volume control/on-off switch (center) and the 4-channel frequency switch (right).

Click picture for larger view

View of the battery compartment of the Williams Sound PPA R7 4-channel FM receiver. This receiver took a standard 9-volt battery.

Click picture for larger view

Close-up of the inside of the lid of the battery compartment of the Williams Sound PPA R7 4-channel FM receiver showing the model number (R7) and manufacturer.

Click picture for larger view

(If a larger picture doesn't appear, you may have to turn your pop-up blocker off)