Inside a 9-Volt Battery - RF Cafe
![Inside a 9-Volt Battery - RF Cafe](https://www.rfcafe.com/references/electrical/images/Duracell-9V-Battery-AAAA-Cells.jpg)
![](https://www.rfcafe.com/references/popular-electronics/images7/popular-electronics-september-1972-cover.jpg)
Simple Solid-State Circuits for the Experimenter, September 1972 Popular Electronics - RF Cafe
![](https://www.rfcafe.com/references/radio-craft/images2/Philco-Models-39-Superhet-radio-service-data-sheet-radio-craft-may-1936.jpg)
Philco Models 39 and 39A, 6-Tube Dual-Range Battery Superhet, May 1936 Radio-Craft - RF
![](https://www.rfcafe.com/references/radio-news/images2/belmont-5p19-schematic-sep-1947-radio-news-1.jpg)
Belmont Model 5P19 Radio Schematic and Parts List, September 1947 Radio News - RF Cafe
![](https://www.rfcafe.com/references/radio-craft/images2/renode-gridless-tube-radio-craft-february-1936-1.jpg)
The Renode - A New Gridless Tube, February 1936 Radio-Craft - RF Cafe
![](https://www.rfcafe.com/references/radio-electronics/images2/mini-antenna-radio-electronics-february-1968-1.jpg)
Build a Mini-Tenna for FM Radio, February 1968 Radio-Electronics - RF Cafe
![](https://www.rfcafe.com/references/electrical/images/Duracell-9V-Battery-AAAA-Cells-Bundled.jpg)
Inside a 9-Volt Battery - RF Cafe
![](https://www.rfcafe.com/references/life/images/electric-motors-life-december-27-1943-5.jpg)
The Electric Motor, December 27, 1943 Life - RF Cafe
![](https://www.rfcafe.com/references/radio-electronics/images/jfet-radio-electronics-june-1969-2.jpg)
JFET's - Put Last Month's Theory to Work, June 1969 Radio-Electronics - RF Cafe
Lithium-Polymer (Li-Po or Li-Poly) Battery Characteristics - RF Cafe
![](https://www.rfcafe.com/references/radio-craft/images2/majestic-model-25-radio-service-data-sheet-short-wave-craft-feb-1935.jpg)
Majestic Model 25, 9-Tube Twin-Detector Radio Service Data Sheet, February 1932 Radio-Craft - RF Cafe
![](https://www.rfcafe.com/references/radio-electronics/images2/interference-causes-remedies-radio-electronics-july-1960-2.jpg)
Interference - Causes, Remedies and Location, July 1960 Radio-Electronics - RF Cafe
![](https://www.rfcafe.com/references/radio-craft/images5/ge-model-250-suitcase-radio-willard-battery.jpg)
GE Model 250 Radio Service Data Sheet, August 1946 Radio-Craft - RF Cafe