“In radio or wireless telephony, Private Line is a term trademarked by Motorola to describe their implementation of Continuous Tone-Coded Squelch System (CTCSS), a method of using low-frequency subaudible tones to share a single radio channel among multiple users.” [ 1 ]
These short podcasts are an approachable way of learning about technical topics related to Amateur Radio. The following topics have been discussed since the first epsode on April 7, 2016:
- HF Loop Antennas
- AM and SSB
- Meteor Scatter
- Long Delayed Echoes
- Restoring Old Radios
- Antenna System Troubleshooting
- Yagi Antennas
- Stealth Antennas
- Anderson PowerPoles and Antenna Polarization
- HF Mobile Antennas
- Bits vs Baud
- Coping with the Solar Minimum
- Coaxial Connectors
- Software Defined Radio
- Standing Wave Ratio
- Magnetic Loop Antennas
- HF Propagation
- Are Linear Amplifiers Really Worthwhile?
- All About Baluns
- Hunting Down Interference
- Open Wire Feed Lines
- Does CW Really Get Through When Nothing Else Can?
- HF Vertical Antennas
A contact form for submitting questions to the Doctor and a complete podcast archive are available on the ARRL’s The Doctor Will See You Now page.
About the ARRL The Doctor Is In Podcast
Sponsored by DX Engineering, ARRL The Doctor is In is an informative discussion of all things technical. Listen on your computer, tablet, or smartphone—whenever and wherever you like!
Every 2 weeks, your host, QST Editor in Chief Steve Ford, WB8IMY, and the Doctor himself, Joel Hallas, W1ZR, will discuss a broad range of technical topics. You can also e-mail your questions firstname.lastname@example.org, And the Doctor may answer them in a future podcast.
Enjoy ARRL The Doctor is In on Apple iTunes, or by using your iPhone or iPad podcast app (just search for ARRL The Doctor is In). You can also listen online at Blubrry, or at Stitcher (free registration required, or browse the site as a guest) and through the free Stitcher app for iOS, Kindle, or Android devices. [ 2 ]
[ 1 ] “Private line”, Wikipedia, retrieved March 2, 2017, https://en.wikipedia.org/wiki/Private_line.
[ 2 ] “The Doctor Will See You Now!”, ARRL The national association for Amateur Radio, last modified February 21 2017, http://www.arrl.org/news/the-doctor-will-see-you-now-13.