Listen to the Doctor discuss an important part of receiver architecture and discover some interesting historical facts in the Filters episode of the ARRL The Doctor is in podcast.
These short podcasts are an approachable way of learning about technical topics related to Amateur Radio. Recent podcast topics include:
Mailbag S units Vacuum Tubes Automatic Gain Control Antenna Wire Keeping Cool Handheld Transceiver Antennas Listener Mailbag Coaxial Cable vs Balanced Lines NVIS (Near Vertical Incidence Skywave)
About the ARRL The Doctor Is In Podcast
The Doctor is In was a biweekly podcast which presented lively discussions of many technical aspects of Amateur Radio from April 7, 2016, to December 19, 2019.
The podcast was hosted by QST Editor in Chief Steve Ford, WB8IMY, and the Doctor himself, Joel Hallas, W1ZR.
Sponsorship for this podcast was provided by DX Engineering.
A complete podcast archive is available on the ARRL's The Doctor is In page.