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Baobab

(4,667 posts)
Thu Apr 21, 2016, 11:26 AM Apr 2016

How to get a source of wildly diverse news that does not scream corporate anything

SOFTWARE DEFINED RADIO!

Go to ebay and buy one of the two following

{a "RTL2832U+R820T" DVB dongle
AND a "HF up converter" and download the software for it and the software at http://sdr.osmocom.org/trac/wiki/rtl-sdr - Using this setup you will also be able to listen to all sorts of other local VHF/UHF stuff - including super hifi FM, also satellites, weather, emergency services, etc. I recommend the free CubicSDR program to receive with. }

Or buy a "softrock rx ensemble III" or
some other one of the new cheap SDRs. (in most cases much better HF/shortwave/ham reception up to 30 MHz)

Buy a USB extension cable and a bunch of clip on RFI suppression beads (I would get a bunch, at least 10- try to get more in a bunch of different sizes)

Buy a 50-100 foot long length of wire and a ground rod and coax cable. Attach one end of wire up as high and in the clear as you can. (observe lightning precautions though.)

Wind yourself a 9:1 balun using a #2 or for VHF #6 ferrite or #43 iron powder toroid core. Put them all together. (you can even use a RFI noise suppression bead for this)

Install CubicSDR, Linrad, Rocky, or any of a dozen other programs.. software that acts as a receiver.

And then treat yourself to visual shortwave HF / FM and even AM radio using your new software defined radio.

Tons of fun and you get a wide variety of programming from around the world, most of it is stuff you would never ever find on the Internet. Even pirate radio stations, revolutions in progress, all sorts of stuff. You may even be able to listen to your local fire, police ambulance, utility trucks, etc. In short its like a really good scanner.

The dongle itself is the best $15 I ever spent.

Note, you need a relatively fast computer to do this right. But if you have one you will end up with a real amazing receiving setup that is not quite but almost the equal of a whole rack of very expensive radio equipment 10 years ago.

19 replies = new reply since forum marked as read
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How to get a source of wildly diverse news that does not scream corporate anything (Original Post) Baobab Apr 2016 OP
Wow...thanks for this! K&R with a bookmark! nt haikugal Apr 2016 #1
I have been listening a lot to my Kenwood TS-480. As a kid I listened to LiberalArkie Apr 2016 #2
Me too! I have been an SWL since I was a kid.. Baobab Apr 2016 #3
My Kenwood is a current model, it has all the DSP stuff and is all mode LiberalArkie Apr 2016 #4
Sometimes Baobab Apr 2016 #5
You can start off with a Tech and get a el-cheapo Baofeng V/Uhf radio for less than $50.00 LiberalArkie Apr 2016 #8
is there a way to use it like you would a base station? (I dont care how it looks) Baobab Apr 2016 #15
The Baofeng is a vhf uhf radio. Line of sight like business radio and police radio. LiberalArkie Apr 2016 #16
Actually, looking into it I think I can do what i want to do Baobab Apr 2016 #17
I think I could build a QRP multiband rig. Baobab Apr 2016 #18
do you have an SDR panadaptor on it? Baobab Apr 2016 #6
No it is an regular state of the art HF radio.. It has a serial port so that the settings and LiberalArkie Apr 2016 #19
Looks like you could run an IF Tap out of your kenwood and then get SDR using some hamlib-compatible Baobab Apr 2016 #7
Before I move to Apple stuff, I used to operate my ts-480 from work over the internet LiberalArkie Apr 2016 #9
Should be easy Baobab Apr 2016 #10
Here is a video you might like concerning SDR LiberalArkie Apr 2016 #14
Oh neat!!! sending to my son now. wendylaroux Apr 2016 #11
they make great gifts Baobab Apr 2016 #12
Awesome! I love this stuff,don't understand alot of it,but that's what google's for. wendylaroux Apr 2016 #13

LiberalArkie

(15,716 posts)
2. I have been listening a lot to my Kenwood TS-480. As a kid I listened to
Thu Apr 21, 2016, 11:34 AM
Apr 2016

my Hallicrafter sort wave for my news. Radio Netherlands, Radio Moscow, Radio Havana Cuba, BBC, VOA. That is where I learned about our corporate news.

Baobab

(4,667 posts)
3. Me too! I have been an SWL since I was a kid..
Thu Apr 21, 2016, 11:44 AM
Apr 2016

SWL with SDR is the way to go these days!

You could team up an SDR with your Kenwood by adding an IF tap. Then you could visualize the IF bandpass using the SDR and also use it to receive. Those older kenwood radios are quite decent but adding an SDR to them makes a quite usable setup. You probably could use a cheap softrock one band SDR. Which would not cost much at all. Or you could use an RTLSDR in direct sampling mode. or just by itself. It depends on the IF frequency. I am sure you can find that info in a few minutes on Google.

Use the word "panadapter" "IF tap" bla bla bla.

LiberalArkie

(15,716 posts)
4. My Kenwood is a current model, it has all the DSP stuff and is all mode
Thu Apr 21, 2016, 11:51 AM
Apr 2016

and is 30kHz - 60MHz so it has everything I want. Too many rightwing nuts on ham for me to ever get on the nets any more. Ham radio never seemed to appeal to Liberals for some reason.

Baobab

(4,667 posts)
5. Sometimes
Thu Apr 21, 2016, 01:47 PM
Apr 2016

But I often hear people I think I would be able to chat with.

Its so cool to be able to talk to people all around the world.

Ive wanted to do that ever since i was a kid.

the equipment is too expensive. WHEN I do it i will probably start out with a QRP rig and build my own PA.

Ive been meaning to do that for a long time.

LiberalArkie

(15,716 posts)
8. You can start off with a Tech and get a el-cheapo Baofeng V/Uhf radio for less than $50.00
Thu Apr 21, 2016, 02:33 PM
Apr 2016

That is what most people do and then get their General and buy a used Kenwood/Yaesu etc HF radio.

Again that is the way I started also.

Baobab

(4,667 posts)
15. is there a way to use it like you would a base station? (I dont care how it looks)
Sat Apr 23, 2016, 03:55 PM
Apr 2016

a 'dock" maybe?

5 watts is okay if you have a decent antenna. (maybe a j-pole made out of 300 ohm twinlead hung in the attic would work.)

LiberalArkie

(15,716 posts)
16. The Baofeng is a vhf uhf radio. Line of sight like business radio and police radio.
Sat Apr 23, 2016, 04:21 PM
Apr 2016

They normally go through repeaters on tall towers. But are mainly local. You can go online and look up ham repeaters.

I just keep my HT (handy talky) charged up and use an external antenna and use a 50w mobile when out and about.

However if you want distant like foreign, then the HF 1.5 mhz to 30 mhz radio with single side band would be the way to go. A lot of guys work QRP (low power) for the heck of it. People have been know to work the world on CW (morse code) with QRP as CW really does not require that much power, just a good receiver. A lot of people are using the digital modes like PSK31 which also need very little power.

Baobab

(4,667 posts)
17. Actually, looking into it I think I can do what i want to do
Sat Apr 23, 2016, 05:43 PM
Apr 2016

I just want to be able to do other stuff and wear a headset with a mike and maybe use a foot pedal for PTT so my hands are free to use the computer.

then the question becomes- do i want to talk to my local hams- Sure- why not, they seem like nice guys from what I hear of them. Seems like the hobby is a lot less popular now than in the past. Which is kind of sad.

For VHF/UHF 5 watts is likely fine, esp. with a three or four element coathanger Yagi. just would like to be able to get to know my local radio geeks.

HF and digital modes seems fairly interesting too.

I like building radio stuff.

its amazing what you can do with SMT. Much easier to DIY now than in the past.

Baobab

(4,667 posts)
18. I think I could build a QRP multiband rig.
Sat Apr 23, 2016, 05:50 PM
Apr 2016

The hermes lite looks quite affordable.. its a 12 bit SDR based on the Be-micro SDK FPGA dev board.

https://groups.google.com/forum/#!forum/hermes-lite

LiberalArkie

(15,716 posts)
19. No it is an regular state of the art HF radio.. It has a serial port so that the settings and
Sat Apr 23, 2016, 06:03 PM
Apr 2016

stuff can be changed or views from a computer. It is a nice mobile/base radio.



http://www.universal-radio.com/catalog/hamhf/0480.html

Baobab

(4,667 posts)
7. Looks like you could run an IF Tap out of your kenwood and then get SDR using some hamlib-compatible
Thu Apr 21, 2016, 02:01 PM
Apr 2016

program so you could click to tune in both directions with a softrock and perhaps also wit an RTLSDR? (dont know for sure on that, definitely you could with a softrock).

you might find the receive on a softrock is as good or better as your kenwood, if you have a good audio card (24 bits, very low SN)

Another direction i have been thinking about is the Hermes-Lite which is based on an Be-Micro Altera FPGA dev board - Its software comparable with the Hermes HPSDR software tools.

I am on Linux so most windows software is out for me. One nice thing about SDR is that in many cases you can put your station somewhere and operate from your laptop over wifi

In the living room, at the kitchen table, or even sitting in your bed with your SO, pets, etc.

That sounds great!

LiberalArkie

(15,716 posts)
9. Before I move to Apple stuff, I used to operate my ts-480 from work over the internet
Thu Apr 21, 2016, 02:41 PM
Apr 2016

Kenwood had all that software for free on their website. I have thought about getting one of those SDR things, a lot of the guys where I used to work were playing with SDR. Since I retired and a little bit before, I just want things to work without a lot of hassle.

I had been on Linux on a lot of things since slackware 0.0.13 and the 4 floppy disk method. I got a Mac Mini to play with writing some software for my iPhone and found out it was BSD, I was hooked and never looked back. I had been wanting a good desktop for Linux for so long and here was the best desk top with real Unix also. I felt at home.

Baobab

(4,667 posts)
10. Should be easy
Thu Apr 21, 2016, 02:51 PM
Apr 2016


You likely just need to add a shielded coax cable to tap the IF at some point, you may need a preamp to reduce noise..feeding back from the SDR IF - a very simple LNA MMIC would work. just to ensure the signals only go in the outbound direction to the SDR.

there are a few SDR programs that work on Macs


Cubic SDR and Linrad maybe?

Baobab

(4,667 posts)
12. they make great gifts
Thu Apr 21, 2016, 05:16 PM
Apr 2016

I usually pay around $7-12 . I have given a lot of them away as presents.

I like the (white or sometimes black) mid sized one with the IEC/PAL connector (not the MCX connector which wears out fast)

It has a curved row of holes on it and on the side it has written in blue or silver text "DVB+DAB+FM"

Ive had very good luck with that specific model. No need to spend more money than that. In fact because this specific model has some electrical advantages over the more popular model 9in my opinion) its a better value.

this model lends itself to a lot of hobby project fun.

They have a nifty little square PCB that you can remove from all the plastic and incorporate into other devices as a complete SDR IF stage. All four corners of the PCB are at ground potential.

its tiny, only around the size of a postage stamp. So you can incorporate them into some task specific device like the feed for a DIY hydrogen line radio telescope - typically then you would use an active USB extension.

A search on Youtube on "RTL2832" will show that they can become the core of hundreds of great science projects for kids or adults.

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