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+---- Forum: Long Range Radio and NVIS (http://forum.survivaluk.net/forumdisplay.php?fid=97)
+---- Thread: NVIS equipment (/showthread.php?tid=2066)
NVIS equipment - Lightspeed - 9 July 2012
This thread is to look at viable NVIS equipment that is available on the market today.
First off a simple but ultra sensitive receiver ( no license nor registration required) that will allow monitoring of SSB voice transmission and CW Morse transmission on the 80m or 40m bands. Particularly on 80m at night this receiver will allow monitoring for signals from ham stations around the British Isles and world wide. If stations beyond 25 miles and within 300 miles from you are detectable, they are reaching you via NVIS routes.
http://www.tentec.com/products/Any-Band-Direct-Conversion-Receiver-Kit.html
Its a small kit that is simple to construct, and having constructed it you'll also know how to repair it if the future need arises.
Cost £ 25 plus shipping
Build time approx 6 hours.
RE: NVIS equipment - Skean Dhude - 9 July 2012
Any distributors in the UK?
RE: NVIS equipment - Lightspeed - 9 July 2012
(9 July 2012, 12:50)Skean Dhude Wrote: Any distributors in the UK?
Waters and Stanton used to stock them but they are not listed at the moment.
These are amazingly good little radios for the money.
See http://www.wsplc.co.uk
Simple Low cost transceiver from Ten Tec TT1340 / 1380 available in the UK for less than GBP 130.00
Attached are details
Its a CW transceiver from a well respected manufacturer.
This is a single band unit
VFO Tuning
Output power up to 3w
RE: NVIS equipment - Skean Dhude - 9 July 2012
They are the same price, what is better the 1340 or the 1380?
RE: NVIS equipment - NorthernRaider - 9 July 2012
NVIS ???? Isnt that a TV show about the US navy ?
, may as well be with my technical understanding
RE: NVIS equipment - Paul - 9 July 2012
Hi NR, hows the back?
NVIS for the unknowing is "ham speak" for Near Vertical Incidence Skywave or low frequency transmitters working from 1.8mhz to 10mhz with vertical or inverted v aerials.
Sort of CB sets working at low frequencies. (CB sets work at 27 Mhz)
Typical modes include morse code and SSB.
You'll need a ham foundation licence to work this and then you are limited to 10 watts.
Problems include:-
Aerials are BIG typically in an inverted v 35' long.
Aerials usually need to be tuned in using an aerial tuning unit.
Both ends need to be working NVIS to achieve reliable communications.
You'll need a ham licence.
and of course if you're working morse, you'll have to learn morse!!!!!!!!!!!
Morse is fun.
It's not quite just learning the code though it's also about the timing i.e.
1. A dot is worth 1 unit (you decide how long that is).
2. A dash is equal to 3 dots
3. The space between parts of the same letter is equal to 1 dot
4. The space between two letters is equal to 3 dots
5. The space between two words is equal to seven dots.
Shall I go on? (Y) -.-- or -. (N)
Would you like the morse code now ? (Y) -.-- or -. (N)
RE: NVIS equipment - NorthernRaider - 9 July 2012
Erm Wibble ?
http://www.flickr.com/photos/43478117@N00/7538166020/
RE: NVIS equipment - Juice - 9 July 2012
12. Power supplies and charging systems, most likely 12v
Very easy to make permanent magnet motor (fairly cheap too).
http://www.energy-creator.com/the-coil.php
Then use one of those plastic tool boxes to house it, along with a 12v battery winding handle and pulley (make your own).
http://www.youtube.com/watch?v=r0IyjsPTxcs&feature=player_embedded
[attachment=119]
Cheers Juice.
RE: NVIS equipment - Kenneth Eames - 10 July 2012
Is there anyone in the Glasgow area who has the knowledge? If so, perhaps we could meet and you could explain how to get me up and running. I could buy the kit first and make it up, and then go from there. Buying the rest of the kit when I can afford it. Kenneth Eames.
RE: NVIS equipment - Bug_out_Bag - 10 July 2012
(10 July 2012, 04:38)Kenneth Eames Wrote: Is there anyone in the Glasgow area who has the knowledge? If so, perhaps we could meet and you could explain how to get me up and running. I could buy the kit first and make it up, and then go from there. Buying the rest of the kit when I can afford it. Kenneth Eames.
I have a friend in Edinburgh who may be able to help you?