--- title: Telos Alliance Blog Featuring Audio News Events Products & Updates (57) description: 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” (57) --- [![Vintage Audio: AC VTVM | Telos Alliance](https://blogs.telosalliance.com/hubfs/Discrepancy_Sheet/FitA_AC_VTVM/Front.jpg)](https://blogs.telosalliance.com/ac-vtvm) ## [Vintage Audio: AC VTVM | Telos Alliance](https://blogs.telosalliance.com/ac-vtvm) By [The Telos Alliance Team](https://blogs.telosalliance.com/author/telos-alliance-team) on Dec 29, 2015, 4:49:31 PM - [Tweet](https://twitter.com/share) # ![AC VTVM](https://blogs.telosalliance.com/hubfs/Discrepancy_Sheet/FitA_AC_VTVM/Front.jpg "AC VTVM")Vintage Audio: AC VTVM A good AC VTVM is an essential tool for troubleshooting analog audio gear, and was also needed for the annual FCC proof-of-performance measurements back in the day. B&W 410 and [HP 403B](http://www.radiomuseum.org/r/hp_ac_voltmeter_403b_403_b.html) meters were frequently seen on the bench at many stations, but an equally-impressive but less remembered device was the Navy ME-6D/U. This installment of Found in the Attic recalls this often overlooked AC voltmeter. [Read More](https://blogs.telosalliance.com/ac-vtvm) [![Vintage Audio: RF Test Twofer | Telos Alliance](https://blogs.telosalliance.com/hubfs/Discrepancy_Sheet/FitA_RF_Twofer/Millen__HD.jpg)](https://blogs.telosalliance.com/rf-test-twofer) ## [Vintage Audio: RF Test Twofer | Telos Alliance](https://blogs.telosalliance.com/rf-test-twofer) By [The Telos Alliance Team](https://blogs.telosalliance.com/author/telos-alliance-team) on Dec 28, 2015, 2:19:05 PM - [Tweet](https://twitter.com/share) # ![Millen 90651 Grid-Dip Meter & Heathkit HD-1250](https://blogs.telosalliance.com/hubfs/Discrepancy_Sheet/FitA_RF_Twofer/Millen__HD.jpg "Millen 90651 Grid-Dip Meter & Heathkit HD-1250")Vintage Audio: RF Test Twofer It's hard to believe in this day of digital technology and broadband RF strips, but at one time a solid understanding of tuned RF circuits was an essential part of electronics troubleshooting, as well as to getting your FCC First Class License. Today, the grid-dip meter is all but forgotten, but it was, and still is, an essential item in the RF engineer's toolbox. This Found in the Attic is another twofer, and looks at both the [Millen 90651 Grid-Dip Meter](http://www.isquare.com/millen/eqpicts/90651.html) and [Heathkit HD-1250](http://www.heathkit.nu/heathkit_nu_HD-1250.html) solid-state dip meter. [Read More](https://blogs.telosalliance.com/rf-test-twofer) [![Vintage Audio: Uher 4000 | Telos Alliance](https://blogs.telosalliance.com/hubfs/Discrepancy_Sheet/FitA_Uher/2_units.jpg)](https://blogs.telosalliance.com/uher-4000) ## [Vintage Audio: Uher 4000 | Telos Alliance](https://blogs.telosalliance.com/uher-4000) By [The Telos Alliance Team](https://blogs.telosalliance.com/author/telos-alliance-team) on Dec 28, 2015, 1:40:33 PM - [Tweet](https://twitter.com/share) # ![Uher L & Uher S](https://blogs.telosalliance.com/hs-fs/hubfs/Discrepancy_Sheet/FitA_Uher/2_units.jpg?width=325&name=2_units.jpg "Uher L & Uher S")Vintage Audio: Uher 4000 Back in the days when every radio station worth its salt had a news department, broadcast equipment catalogs had a section for remote news gathering equipment. Included were items like the indestructible [EV-635A microphone](http://www.electrovoice.com/product.php?id=100), mic flags, NiCad batteries and chargers, telephone couplers and of course, portable recorders. [Read More](https://blogs.telosalliance.com/uher-4000) [![Vintage Audio: Taberamp Record Electronics | Telos Alliance](https://blogs.telosalliance.com/hubfs/Discrepancy_Sheet/FitA_Taber/Front.jpg)](https://blogs.telosalliance.com/taberamp-record-electronics) ## [Vintage Audio: Taberamp Record Electronics | Telos Alliance](https://blogs.telosalliance.com/taberamp-record-electronics) By [The Telos Alliance Team](https://blogs.telosalliance.com/author/telos-alliance-team) on Dec 28, 2015, 1:02:12 PM - [Tweet](https://twitter.com/share) # ![Taberamp](https://blogs.telosalliance.com/hs-fs/hubfs/Discrepancy_Sheet/FitA_Taber/Front.jpg?width=300&name=Front.jpg "Taberamp")Vintage Audio: Taberamp Record Electronics   For over four decades, open reel tape was the medium of choice for radio stations and recording studios. Over that time, recorder technology, in particular the record-playback electronics, made quantum leaps in performance. Vacuum tubes gave way to transistors, and finally integrated circuits. The history of the technology is quite interesting, and this month's subject is a bit of a mystery, so come along as we examine Taber Manufacturing and Engineering Company's Taberamp tape recording electronics. From the late 1950s through the 70s, [Ampex 350](http://reel2reeltexas.com/AccurateSoundAmpex351Amp4.jpg) and later [440 recorders](http://reel2reeltexas.com/vinAmpexAG445B2.jpg) were a staple at practically every radio station in the country. They were legendary for their battleship-quality construction and long life. Ironically, that was also part of the problem. 350, and later 440 record-playback electronics were alive and well for many years after their audio specs had passed their prime. [Read More](https://blogs.telosalliance.com/taberamp-record-electronics) [![Vintage Audio: RCA Victor 45-J-2 Turntable | Telos Alliance](https://blogs.telosalliance.com/hubfs/Discrepancy_Sheet/FitA_RCA_45_Turntable/In_Action.jpg)](https://blogs.telosalliance.com/rca-victor-45-j2-turntable) ## [Vintage Audio: RCA Victor 45-J-2 Turntable | Telos Alliance](https://blogs.telosalliance.com/rca-victor-45-j2-turntable) By [The Telos Alliance Team](https://blogs.telosalliance.com/author/telos-alliance-team) on Dec 28, 2015, 12:27:16 PM - [Tweet](https://twitter.com/share) # ![RCA Victor 45-J-2 Turntable](https://blogs.telosalliance.com/hs-fs/hubfs/Discrepancy_Sheet/FitA_RCA_45_Turntable/In_Action.jpg?width=300&name=In_Action.jpg "RCA Victor 45-J-2 Turntable")Vintage Audio: RCA Victor 45-J-2 Turntable An earlier installment of Found in the Attic examined the ATC-Collins P-190, the first commercially produced cart machine. The point was made that the fast-paced Top-40 format would not have been possible without this device. The same can be said for 45 RPM records. The difference is that the cart machine was designed for radio from day one, while the 7-inch record began as a consumer medium. It wasn't long though, until it became the mainstay of Top 40 music. [Read More](https://blogs.telosalliance.com/rca-victor-45-j2-turntable) [![Vintage Audio: Unlikely Portables | Telos Alliance](https://blogs.telosalliance.com/hubfs/Discrepancy_Sheet/FitA_Unlikely_Portables/Both.jpg)](https://blogs.telosalliance.com/unlikely-portables) ## [Vintage Audio: Unlikely Portables | Telos Alliance](https://blogs.telosalliance.com/unlikely-portables) By [The Telos Alliance Team](https://blogs.telosalliance.com/author/telos-alliance-team) on Dec 28, 2015, 12:07:04 PM - [Tweet](https://twitter.com/share) # ![Unlikely Portables](https://blogs.telosalliance.com/hubfs/Discrepancy_Sheet/FitA_Unlikely_Portables/Both.jpg "Unlikely Portables")Vintage Audio: Unlikely Portables The advent of the transistor made radio a truly put-it-in-your-pocket device. The earlier suitcase radios of the 1940s got radio out of the living room, but weren't really portable by today's standards. The first transistor radios were AM receivers. As the technology improved, short wave bands, and then FM were added to the mix. By the mid-1970s, AM-FM portables of various sizes and styles were ubiquitous. There were also radios with other bands included. These were never hugely popular, but they are still an interesting chapter in the history of portable radios. This Found in the Attic is a twofer, and features the [Lafayette Radio Electronics Guardian 11](http://www.radiomuseum.org/r/lafayette_guardian_11.html) and the [Panasonic RF-1104](https://books.google.com/books?id=bwEAAAAAMBAJ&pg=PA5&lpg=PA5&dq=panasonic+rf-1104&source=bl&ots=DqPG3Bg_oE&sig=7_qljSFenkBVwStxvLZ929uEukE&hl=en&sa=X&ved=0CEMQ6AEwCGoVChMI3Lbivsi7yAIVSD0-Ch374gDQ#v=onepage&q=panasonic%20rf-1104&f=false). [Read More](https://blogs.telosalliance.com/unlikely-portables) [![Vintage Audio: Ampro TTP-S Turntable Preamp | Telos Alliance](https://blogs.telosalliance.com/hubfs/Discrepancy_Sheet/FitA_Ampro/front.jpg)](https://blogs.telosalliance.com/ampro-ttp-s-turntable-preamp) ## [Vintage Audio: Ampro TTP-S Turntable Preamp | Telos Alliance](https://blogs.telosalliance.com/ampro-ttp-s-turntable-preamp) By [The Telos Alliance Team](https://blogs.telosalliance.com/author/telos-alliance-team) on Dec 28, 2015, 11:37:33 AM - [Tweet](https://twitter.com/share) # ![Ampro TTP-S Turntable Preamp](https://blogs.telosalliance.com/hs-fs/hubfs/Discrepancy_Sheet/FitA_Ampro/front.jpg?width=300&name=front.jpg "Ampro TTP-S Turntable Preamp")Vintage Audio: Ampro TTP-S Turntable Preamp The lowly turntable preamp was one of those things that got no respect at most stations. It was often left in the dark, hanging by the wires inside the turntable pedestal. Stations that would spend a princely sum on a new console, audio processor and transmitter would simply move the old preamp into the new studio. As the drive for better audio quality ratcheted up, that began to change, but slowly. [Read More](https://blogs.telosalliance.com/ampro-ttp-s-turntable-preamp) [![Capturing Audio for Podcasts with Mike Phillips | Telos Alliance](https://blogs.telosalliance.com/hubfs/TWiRT_blog/TWiRT_285.jpg)](https://blogs.telosalliance.com/capturing-audio-for-podcasts-with-mike-phillips) ## [Capturing Audio for Podcasts with Mike Phillips | Telos Alliance](https://blogs.telosalliance.com/capturing-audio-for-podcasts-with-mike-phillips) By [The Telos Alliance Team](https://blogs.telosalliance.com/author/telos-alliance-team) on Dec 19, 2015, 2:25:00 PM - [Tweet](https://twitter.com/share) # ![TWiRT 285](https://blogs.telosalliance.com/hubfs/TWiRT_blog/TWiRT_285.jpg "TWiRT 285")Capturing Audio for Podcasts with Mike Phillips If it sounds sketchy, distorted, or muffled, they won’t listen. Podcasting studio guru, Mike Phillips, divulges his secrets for capturing clean, clear audio. Mics, pre-amps, consoles - what he recommends and how to use them. This is a must-watch for podcasters and any audio content creators! [Read More](https://blogs.telosalliance.com/capturing-audio-for-podcasts-with-mike-phillips) [![POWER101 Goes Digital with Axia iQ & AoIP | Telos Alliance](https://blogs.telosalliance.com/hubfs/success_blog/POWER101/iQ_closeup.jpg)](https://blogs.telosalliance.com/submit-to-the-power-101-of-axia) ## [POWER101 Goes Digital with Axia iQ & AoIP | Telos Alliance](https://blogs.telosalliance.com/submit-to-the-power-101-of-axia) By [The Telos Alliance Team](https://blogs.telosalliance.com/author/telos-alliance-team) on Dec 16, 2015, 5:30:00 AM - [Tweet](https://twitter.com/share) # ![Golden Oldies Hit Radio - POWER101](https://blogs.telosalliance.com/hubfs/Direct_Current/Power_101.jpg "Golden Oldies Hit Radio - POWER101")POWER101 Goes Digital with Axia iQ & AoIP Sean Martin may like to joke about holding the title of 'Head Tea Boy' at POWER101 in England's Exeter / Devon region, but as Director of Business Development for Talk Productions Ltd (POWER101's parent company), he's got his hands in just about everything at the area's coolest local broadcast station. [Read More](https://blogs.telosalliance.com/submit-to-the-power-101-of-axia) [![Naughty or Nice? Christmas Gifts for Engineers | Telos Alliance](https://blogs.telosalliance.com/hubfs/TWiRT_blog/TWiRT_284.jpg)](https://blogs.telosalliance.com/naughty-or-nice-christmas-gifts-for-engineers) ## [Naughty or Nice? Christmas Gifts for Engineers | Telos Alliance](https://blogs.telosalliance.com/naughty-or-nice-christmas-gifts-for-engineers) By [The Telos Alliance Team](https://blogs.telosalliance.com/author/telos-alliance-team) on Dec 11, 2015, 2:01:00 PM - [Tweet](https://twitter.com/share) # ![TWiRT 284](https://blogs.telosalliance.com/hubfs/TWiRT_blog/TWiRT_284.jpg "TWiRT 284")Naughty or Nice? Christmas Gifts for Engineers Who’s the engineer on your Christmas list? Perhaps it’s you! From network and audio analysis tools to weather stations, cameras, and stocking stuffers, Chris Tobin and Kirk Harnack check out some gift ideas for us engineers to put on our wish lists. [Read More](https://blogs.telosalliance.com/naughty-or-nice-christmas-gifts-for-engineers) [Previous](https://blogs.telosalliance.com/page/56) [All posts](https://blogs.telosalliance.com/all) [Next](https://blogs.telosalliance.com/page/58) 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!*