Posted on 08/19/2017 5:37:59 AM PDT by canalabamian
Peck away...
Yup. Audio rectification? I believe that there is an immunity test done now, especially for consumer devices.
However, power and distance rule here and if you have a high wattage source just a few feet away like in your neighbors backyard, it is very difficult to prevent.
The hook, for me, was the DMR system that allow the connection of the radio and the computer network.
The Winsystem, PAPANET, and Brandmeister are interesting.
Scavenging and re-purpose hacks are fun. The used parts shelf at Habitat For Humanity has many treasures. Making antennas from “stuff” is neat (two steel coat hangers and PVC pipe).
All I know is Parasitic diodes are in the junctions of most substrate chips for Voltage protection
The older I get the dummer I get
I believe it is a voltage/charge reference for the PN junctions in a semiconductor. Like a copper ground plane structure in a printed circuit board. It is a common return path for the current so as to prevent disparities in adjacent subcircuits. Especially, when there are high speed parallel signals.
You must be talking about the "waterfall".
When Radio Shack got out of the Amateur radio business about 15 years ago, I bought (3) 25 watt max transceivers, a really nice dual band handheld, an AC to DC power supply, and numerous mobile antennas for about $250.00. My primary transceiver is an older ICOM 208H. I recently bought a Beofeng handheld to play with for under $30.00.
We primarily use VHF when we travel, which is most of the timw.
On the Smart side HAM!
Still Locked and Loaded,,,I Hope.
Yes, I am.
WA5VJB has lots of articles on how to build free or cheap antennas for almost any application.
http://www.wa5vjb.com/references.html
I used to have pictures of it on my QRZ page. I have them on my computer somewhere, I should find and post them.
Exactly.
I let my license lapse but would love to get back into it one day. The suggestions to go to ARRL are on point.
Thanks
Just purchased a Yaesu FT-60R Dual band on Amazon for $150 used like new. Normally $183 or so... I was learnig toward on the BaoFeng producs, but they are Chinese made...maybe for a second radio. The Yaesu is Japanese made with customer service here in the States. Very well reviewd unit and far easier to program than the BaoFeng manually. Both can be programmed via computer, but then again it seems the BaoFeng sometimes has issues with poor cabling choices and drivers.
The BaoFeng has additional transmit channels than the Yaesu, such as the FRS GMRS, but it is illegal to use that radio to transmit on those channesl as it is not FCC compliant due to too much power for those channels. The Yaesu is FCC compliant all the way around. The Yaesu does not use a lithium-ion battery pack and has the ability with the proper carriage (extra) to just use six alkaline AA batteries...that is good in an emergency situation.
I also got the Diamond 77 (?) Antennae to go with the radio for future use. The rubber duck is adequate for most uses, but the longer antennae is for when I have to use a different band to reach out and touch someone.
The Yaesu and the BaoFeng are both dual band—as a licensed Technician you are able to use the 2M and 70cm bands. The General and Extra Licenses allow more band usage. Fair enough.
The ARRL licensing books are the way to go...spend the money and get the sprial bound. Should take a few days to learn what you need to pass the Technician license. Only 35 questions and you have to get something like 26 correct to pass. Hey passing is passing, right? I plan on taking my test in either earlier November, or December.
You can purchase a radio prior to licensing. You just cannot transmit until you have a license. A big no-no.
Hope this helps. I learned all this in an afternoon just crusing amazon and a few ham sites. Good Luck.
I am getting the radio to not only follow the wildfires in our neck of the woods. Yes we had the LaPorte and Wall fires this year just down the road from us. But to be able to use to get needed information either in or out.
THe dual band radios do have scanner capability, in that if you enter the freqs of your local police, fire, etc, then you can listen in. You can find those frequencies on the net. Some major cities/areas have switched from analog to digital or have trunk systems so the messaging is encoded and you are not able to listen in. There is a way to check to see if your local agencies are digital or not....mine are not.
Good Luck!
Thank you!
Holy crap! With that out in the yard you can talk to Mars.
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