Donald Hester
Washington State Licensed Home Inspector #647
WSDA#80050
InterNachi Member #NACHI10022401
509-670-9572
Contact Us
Washington State Licensed Home Inspector #647
WSDA#80050
InterNachi Member #NACHI10022401
509-670-9572
Contact Us
DonHester's blog
Days of yore the old RCA DYNAMIC DEMONSTRATOR
Submitted by DonHester on Sun, 02/19/2017 - 12:22.
Days of yore the old RCA DYNAMIC DEMONSTRATOR
Wenatchee Home Inspections
With technology today we sometimes forget those day of the past. Here is a little piece of history I ran upon during an home inspection, this is from RCA, The RCA Dynamic Demonstrator.
These were produced to teach aspiring radio junkies the ins and outs of how a radio works. There were other demonstrators made to teach other electronics such as televisions, AM- FM etc.
From RCA-
“The RCA DYNAMIC DEMONSTRATOR, when used in conjunction with RCA Test Equipment, shows exactly how the most complicated circuits function. It facilitates instruction methods and provides the student with an effective method for observing by visual, aural, and/or quantitative means all functions and phenomena that occur in a radio circuit—from antenna to loudspeaker, using the popular system of Signal Tracing.
The Dynamic Demonstrator is a typically modern superheterodyne receiver equipped with automatic volume control, automatic frequency control ami phase inversion . . . with all working parts mounted on a vertical board more than five feet long and nearly three feet high! The schematic circuit of the receiver fills the entire hoard, with actual circuit components mounted directly adjacent to the circuit symbols.”
Transforms Text books into Action--Has a great Academic Value for teaching or learning radio principles.
SPECIFICATIONS
• CIRCUIT
Typical 12-Tube 3-Band Superheterodyne with Tuned R-F Stage. AFC, AVC, Phase Inversion,
Push-Pull Output.—Broadcast Band in Normal Alignment Only. Suffucient Broadcast Sensitivity for Demonstration.
• TUBES AND FUNCTION . . .
RCA-6K7—R-F Amplifier, RCA-6J7—Oscillator, RCA-6J7—Automatic Frequency Control, RCA-6L7—First
Detector, RCA-6K7—l-F Amplifier, RCA-6H6—Discriminator, RCA-6H6—2nd Detector amd AVC, RCA-
6US/6G5—Magic Eye Tuning Indicator, RCA-6SC7—First A-F and Phase Inverter. 2—RCA-6F6’s Push-Pull
A-F Power Output, RCA-5Y3-G—Rectifier.
All tubes and sockets mounted on rear
Here is from another ad from a 1948 Popular Mechanics-
CONSIDERED a most practical and efficient tool for the teaching of radio theory, operation and
maintenance for which earlier models were used during the war, this improved unit that now includes an FM section is also useful for demonstrating the application of test equipment to radio servicing. Developed by the test-and-measuring-equipment division of the RCA Tube Department, the instrument is a complete, operating, six-tube radio receiver with its circuits and components laid out flat on a panel 45 in. long and 33 in. high. All parts are easily accessible and clearly exposed for study while in operation.
I found this all fun and most radiophiles would love running into this piece of history.
"If it weren't for Philo T. Farnsworth, inventor of television, we'd still be eating frozen radio dinners."
Johnny Carson
NCW Home Inspections, LLC is a Licensed Washington State Home Inspection service located in Wenatchee Washington serving Chelan County, Douglas County, Kittitas County, Okanogan County and Grant County Washington and the cities of Wenatchee, Leavenworth, Cashmere, Oroville, Cle Elum, East Wenatchee, Quincy and many more…
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Instructor- Fundamentals of Home Inspection- Bellingham Technical College
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