RPPC OR McMinnville Radio Homemade Broadcast Band Receiver Horn Speaker Postcard

Condition: Please see included photos for full detail and condition of card.

Rppc or mcminnville radio homemade broadcast band receiver horn speaker postcard

Postally used
BC

The radio is a home-made AM broadcast band receiver.  Many people in that era built their own radios, since commercially built radios were expensive.  The photo shows a commercially manufactured QC radio horn speaker, something that a radio experiment could not easily build.  Notice the light bulb socket hanging just above the silver box.  The boxes below it are plugged into the light bulb wiring. They are the power supply, also home-made.  If I were to date the photo, it would be no earlier than 1924, since that was about that time that battery eliminator circuitry (power supply) became practical and affordable.   

It looks as though the jars on the shelves are not used for storing food, but for storing radio parts and other hardware usually found in an experimenter’s workshop. It is still common to this day for radio enthusiast to store stuff in glass jars, as they are free storage containers. -- Bob Allison, ARRL Laboratory Engineer (American Radio Relay League).

These are vintage postcards. They may have marks, bends, creases, rounded corners, stains, small tears, etc. I take high quality scans of the postcards. Please review the attached photos for the full detail and condition of the card.  

Postally used means the card has been sent through the mail and has a postmark date/ or postage stamp.
POSTALLY UNUSED means the card has not been sent through the mail but may still be stamped, addressed or contain other handwriting.

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carolines_collectibles (80)

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08/12/2017

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Tennessee, United States

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