Additionally, an affordable method to decode for EAS reception
Marcos O’Roarke, senior engineer at Linkup Communications in Denver, can also be the “SoCal Broadcast Engineer,” posting neat engineering movies on YouTube.
With the vacations proper across the nook, Marcos did a short video describing a few of the instruments that make his life simpler. It would provide you with some gift-giving concepts. At YouTube, it’s “The Important Instruments Each Engineer Wants.”
Marcos has a superb variety of non-engineers viewing, too. His adventures round broadcast amenities supply a peek backstage for PDs and GMs who marvel, “Simply what does that engineer do?”
Kevin offers us the Raspberry
Kevin Trueblood is president of KTrue Media Providers, which supplies technical options for broadcast, digital and IT wants and relies in Fort Myers, Fla. His web site is www.ktruemediaservices.com. He does his contract work along with his full-time job as affiliate basic supervisor for WGCU Public Media.
Kevin was happy that we talked about the SSH No Ports service just lately. He lets us know {that a} comparable service is offered — without spending a dime — from Cloudflarereferred to as reverse proxy.
Kevin has one at a consumer’s transmitter website; it lets him entry the native safety cameras and transmitter distant management. Very like SSH No Ports, site visitors is managed via an affordable Raspberry Pi. Kevin can entry the gadgets via any internet browser. No ports are open on the firewall and no VPN is required.
It’s a helpful and cheap resolution that may safe your gadgets whereas making them accessible.
Extra Saigon reminiscences
Burt Fisher noticed the images we’ve revealed exhibiting gear on show at Independence Palace in Ho Chi Minh Metropolis, aka Saigon.
Bert himself visited in 2012 and shares two extra images from that go to, and we share them right here. When you’ve come throughout fascinating broadcast gear in your travels, take pix and ship them my manner.
Sticky resolution to shielding
Our engineering colleague Dan Slentz was requested by a buddy to assist him discover conductive tape. Dan urged www.grainger.com. Seek for “copper tape” or “conducting electrical tape” and you will see rolls in addition to squares or strips of the fabric, which will be useful when shielding.
Cheap EAS receiver resolution
And Ron Schacht writes in to notice that since Dayton has gone away, individuals are having points discovering receivers appropriate to decode AM or FM stations for EAS reception.
You should purchase high-quality tuners however that’s severe overkill for this utility. You’ll be able to solder wires throughout a conveyable radio or desk radio, if you will discover one, however there’s a drawback to this method too. If you’re at a distance from your assigned monitor station, you can not put an exterior antenna on most client radios.
Ron’s reply is to select up a few actually low cost car radios.
Low cost shops and on-line sources like Amazon promote plain ol’ AM/FM radios for $30 or much less. They’ve fairly good sensitivity on each bands and supply an exterior antenna connection. Those Ron has discovered have been rock-solid for staying on frequency.
Ron has mounted a pair on a rack panel and mounted it in his rack out of sight. The audio required to drive an EAS decoder is so low that the radio quantity is saved all the way down to the purpose the place a 500 mA 12 volt wall wart will run the radio. Be sure to get a regulated wall wart only for sufficient filtering.
Now, Ron cautions that some radios received’t permit you to floor one of many speaker wires. In such a case, you should use a 70 volt speaker transformer between the radio and the EAS enter. You may additionally must put a resistive pad between the 70 volt line out and the EAS decoder in. On radios the place one aspect of the speaker will be grounded, you may run the audio proper into the EAS field.
Many radios now have two separate energy feeds; one powers the radio and the opposite powers the frequency reminiscence. Ron has used blocking diodes on the reminiscence wire to feed the identical 12 volts that runs the radio to the reminiscence. He then provides a 9 volt battery to the reminiscence line, so if the AC energy fails, the battery will maintain the frequency within the reminiscence.
This resolution has saved some cash within the engineering price range and offered dependable EAS reception.
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