--- title: Telos Alliance Blog Featuring Audio News Events Products & Updates | Vintage Electronics (2) description: Vintage Electronics | Telos Alliance has led the audio industry’s innovation in Broadcast Audio, Digital Mixing & Mastering, Audio Processors & Compression, Broadcast Mixing Consoles, Audio Interfaces, AoIP & VoIP for over three decades. The Telos Alliance family of products include Telos® Systems, Omnia® Audio, Axia® Audio, Linear Acoustic®, 25-Seven® Systems, Minnetonka™ Audio and Jünger Audio. Covering all ranges of Audio Applications for Radio & Television from Telos Infinity IP Intercom Systems, Jünger Audio AIXpressor Audio Processor, Omnia 11 Radio Processors, Axia Networked Quasar Broadcast Mixing Consoles and Linear Acoustic AMS Audio Quality Loudness Monitoring and 25-Seven TVC-15 Watermark Analyzer & Monitor. Telos Alliance offers audio solutions for any and every Radio, Television, Live Events, Podcast & Live Streaming Studio With Telos Alliance “Broadcast Without Limits” “Love What You Hear” (2) --- [![Vintage Audio: Wilkinson Transmitter Extension Meter | Telos Alliance](https://blogs.telosalliance.com/hubfs/Blogs/FitA%20-%20Transmitter%20Extension%20Meter/Wilkinson%20front.jpg)](https://blogs.telosalliance.com/wilkinson-extension-meter-panel) ## [Vintage Audio: Wilkinson Transmitter Extension Meter | Telos Alliance](https://blogs.telosalliance.com/wilkinson-extension-meter-panel) By [The Telos Alliance Team](https://blogs.telosalliance.com/author/telos-alliance-team) on Aug 4, 2016, 3:13:00 PM - [Tweet](https://twitter.com/share) # ![Wilkinson Transmitter Extension Meter](https://blogs.telosalliance.com/hs-fs/hubfs/Blogs/FitA%20-%20Transmitter%20Extension%20Meter/Wilkinson%20front.jpg?width=340&name=Wilkinson%20front.jpg "Wilkinson Transmitter Extension Meter")Vintage Audio: Wilkinson Transmitter Extension Meter This chapter of Found in the Attic explores a forgotten chapter in the history of broadcast remote control technology, [transmitter extension meter panels](https://books.google.com/books?id=iLM8AAAAIAAJ&pg=PA217&lpg=PA217&dq=transmitter+extension+meters&source=bl&ots=RZ_c1rJlMj&sig=OWW3cwCmqt4oWZyB5XD8eRsPlRk&hl=en&sa=X&ved=0ahUKEwir-OOR0J3OAhVDSCYKHTTBD4kQ6AEIRTAC#v=onepage&q=transmitter%20extension%20meters&f=false). In the earliest days of radio, the Commission required all operating transmitter sites to be manned by someone with a First Class FCC license. That person was required to take meter readings every 30 minutes, maintain the transmitter log, and make repairs, or switch to a backup in the event of failures. As technology evolved, and transmitters became more reliable, the rules were relaxed so that sites could be controlled remotely. In FCC lingo, the studio where the operator on duty was stationed was known as the control point. They Commission allowed most stations to have operators with a Third Class license and broadcast endorsement on duty. There were exceptions for directional stations, and those with higher power, which still required the First Class ticket. [Read More](https://blogs.telosalliance.com/wilkinson-extension-meter-panel) Topics: [Vintage Electronics](https://blogs.telosalliance.com/topic/vintage-electronics), [Vintage Technology](https://blogs.telosalliance.com/topic/vintage-technology) [![Vintage Audio: Hallicrafters S-20 'Sky Champion' receiver | Telos Alliance](https://blogs.telosalliance.com/hubfs/Blogs/FitA%20-%20Hallicrafters/S-20%20front.jpg)](https://blogs.telosalliance.com/hallicrafters-s20-sky-champion-receiver) ## [Vintage Audio: Hallicrafters S-20 'Sky Champion' receiver | Telos Alliance](https://blogs.telosalliance.com/hallicrafters-s20-sky-champion-receiver) By [The Telos Alliance Team](https://blogs.telosalliance.com/author/telos-alliance-team) on Jul 19, 2016, 10:29:00 PM - [Tweet](https://twitter.com/share) # ![Hallicrafters S-20 Sky Champion receiver](https://blogs.telosalliance.com/hs-fs/hubfs/Blogs/FitA%20-%20Hallicrafters/S-20%20front.jpg?width=340&name=S-20%20front.jpg "Hallicrafters S-20 Sky Champion receiver")Vintage Audio: Hallicrafters S-20 'Sky Champion' receiver This installment of Found in the Attic examines the Hallicrafters S-20 'Sky Champion' receiver. The 'Sky Champion' line was the company's' mid-priced communications receiver.   Introduced in 1938, the S-20 was replaced by the S-20R in 1939. Since it was in production for less than a year, these receivers are somewhat rare. There are several differences between the S-20 and S-20R. The S-20 primarily used tubes with grid caps, while the later S-20R used newer replacements. Tube lineup for the S-20 includes: 6K7, RF stage; 6L7, 1st detector-mixer; 6J5, HF osc; 6K7, IF amp; 6Q7, 2nd detector-AVC-1st audio stage; 6F6, audio out; 6J5, BFO and 80, rectifier. [Read More](https://blogs.telosalliance.com/hallicrafters-s20-sky-champion-receiver) Topics: [Vintage Electronics](https://blogs.telosalliance.com/topic/vintage-electronics), [Vintage Audio Technology](https://blogs.telosalliance.com/topic/vintage-audio-technology) [![Vintage Audio: Zenith Allegro Modular Stereo | Telos Alliance](https://blogs.telosalliance.com/hubfs/Blogs/FitA%20-%20Zenith%20Allegro/Zenith%20top.jpg)](https://blogs.telosalliance.com/zenith-allegro-modular-stereo) ## [Vintage Audio: Zenith Allegro Modular Stereo | Telos Alliance](https://blogs.telosalliance.com/zenith-allegro-modular-stereo) By [The Telos Alliance Team](https://blogs.telosalliance.com/author/telos-alliance-team) on Jun 14, 2016, 10:00:00 AM - [Tweet](https://twitter.com/share) # ![Zenith Allegro Modular Stereo](https://blogs.telosalliance.com/hs-fs/hubfs/Blogs/FitA%20-%20Zenith%20Allegro/Zenith%20top.jpg?width=300&name=Zenith%20top.jpg "Zenith Allegro Modular Stereo")Vintage Audio: Zenith Allegro Modular Stereo The 1970s saw the music industry grow in to a multi-billion dollar business. This explosive growth was one of the driving forces behind a comparable expansion in consumer electronics, and in particular, hi-fi gear. Component stereo gear was the bread and butter of companies such as Pioneer, [Marantz](http://www.us.marantz.com/us/pages/home.aspx) and [Denon](https://usa.denon.com/us). Consumers could purchase tuners, amps and tape decks at a price point they could afford, and upgrade as new technology and/or larger paychecks became available. At the other end of the spectrum were modular stereo systems. These devices usually had all of the above components, along with a turntable, in one chassis. Since all of the electronics were usually on a single motherboard, and there was only one chassis, they could be manufactured fairly inexpensively. There were two varieties of modular stereos. The [large cabinet systems](https://www.youtube.com/watch?v=Mpl2MtHRpQ4) found in virtually every living room during the 1970s was one type, and there were also [tabletop units](https://www.youtube.com/watch?v=kRWBXmpsOmU). [Read More](https://blogs.telosalliance.com/zenith-allegro-modular-stereo) Topics: [Vintage Electronics](https://blogs.telosalliance.com/topic/vintage-electronics) [![NuTone 2067B-2068B Transistor Radio-Intercom System | Telos Alliance](https://blogs.telosalliance.com/hubfs/Blogs/FitA%20-%20NuTone/NuTone1.jpg)](https://blogs.telosalliance.com/nutone-2067b-2068b-transistor-radio-intercom-system) ## [NuTone 2067B-2068B Transistor Radio-Intercom System | Telos Alliance](https://blogs.telosalliance.com/nutone-2067b-2068b-transistor-radio-intercom-system) By [The Telos Alliance Team](https://blogs.telosalliance.com/author/telos-alliance-team) on May 24, 2016, 4:00:00 PM - [Tweet](https://twitter.com/share) # ![NuTone 2067B Radio-Intercom System](https://blogs.telosalliance.com/hs-fs/hubfs/Blogs/FitA%20-%20NuTone/NuTone1.jpg?width=320&name=NuTone1.jpg "NuTone 2067B Radio-Intercom System")NuTone 2067B-2068B Transistor Radio-Intercom System  Radios come in all shapes and sizes, and this column seeks out some of the forgotten and unusual examples. Previous installments have examined farm radios, unlikely portables and early clock radios. This time around, we'll look at the NuTone 2067B transistor radio intercom system. It dates to 1965, when home radio-intercoms were something of a status symbol in larger houses. [Read More](https://blogs.telosalliance.com/nutone-2067b-2068b-transistor-radio-intercom-system) Topics: [Vintage Radio Technology](https://blogs.telosalliance.com/topic/vintage-radio-technology), [Vintage Electronics](https://blogs.telosalliance.com/topic/vintage-electronics) [Previous](https://blogs.telosalliance.com/topic/vintage-electronics/page/1) [All posts](https://blogs.telosalliance.com/all) Blog Search Search ### Recent Posts ## Subscribe *If you love broadcast audio, you'll love Telos Alliance's newsletter. Get it delivered to your inbox by subscribing below!*