Author Topic: 40m NVIS for this coming Sunday  (Read 85022 times)

Offline Carl

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Re: 40m NVIS for this coming Sunday
« Reply #210 on: February 15, 2015, 08:23:38 AM »
Not sure if cold weather will help today but I got it...-7 actual -26 wind chill

Tends to promote static , but that happens even at 50 degrees we have here today.
I plan to be there from the house rather that the BOL.

Offline chad

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Re: 40m NVIS for this coming Sunday
« Reply #211 on: February 15, 2015, 10:06:25 AM »
switched my phone plan over to my sister's family plan, saving $70 a month and got a new phone...

I got the PSK31 app don't quite understand it, maybe we can try that today.

Offline Canadian Prepper

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Re: 40m NVIS for this coming Sunday
« Reply #212 on: February 15, 2015, 11:38:26 AM »
I'll be listening from my QTH with the wire antenna. Fingers crossed that we'll be able to make contact.

Offline Alan Georges

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Re: 40m NVIS for this coming Sunday
« Reply #213 on: February 15, 2015, 11:43:50 AM »
OK, same schedule as last week suit everybody?
Quote
For starter frequencies here's the same set as before:
1:00 CST: 40m 7.275 LSB
1:15 CST: 20m 14.320 USB  (and stay away from 14.313, it's the FCC-designated troll freq)
1:30 CST: 10m 28.570 USB
We can refine what to actually use on the fly, via the chat room.

Offline Carl

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Re: 40m NVIS for this coming Sunday
« Reply #214 on: February 15, 2015, 11:54:06 AM »
Just got in the hole,delayed so I will work from here.

Offline chad

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Re: 40m NVIS for this coming Sunday
« Reply #215 on: March 01, 2015, 01:43:49 PM »
Went to the gun range today, I'll be ready to test next Sunday.

Offline Carl

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Re: 40m NVIS for this coming Sunday
« Reply #216 on: March 01, 2015, 02:05:36 PM »
Went to the gun range today, I'll be ready to test next Sunday.

I did the same as last week,waited in TSP chat...no one showed so I typed to Keebler for a bit.

Offline Alan Georges

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Re: 40m NVIS for this coming Sunday
« Reply #217 on: March 01, 2015, 05:34:38 PM »
Went to the gun range today, I'll be ready to test next Sunday.
Likewise.   Had a class.

Offline chad

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Re: 40m NVIS for this coming Sunday
« Reply #218 on: March 07, 2015, 09:19:52 AM »
bump....only to get more eye's on the post.

All are welcome, tomorrow @ 1 CST, meet up in the chat room.

Offline Carl

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Re: 40m NVIS for this coming Sunday
« Reply #219 on: March 07, 2015, 10:20:44 AM »
bump....only to get more eye's on the post.

All are welcome, tomorrow @ 1 CST, meet up in the chat room.

I plan to be there.

Offline Alan Georges

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Re: 40m NVIS for this coming Sunday
« Reply #220 on: March 07, 2015, 12:17:40 PM »
I'll try to make it, looking about 70%-ish right now.  Here's the forecast:

40m


20m


10m


Hmm, that 10m doesn't look good at all.  Maybe stick to 40 & 20.  We've never had any 10m traffic anyway.

Offline Canadian Prepper

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Re: 40m NVIS for this coming Sunday
« Reply #221 on: March 09, 2015, 06:24:32 PM »
Sorry folks, but I had a range day and much needed escape from the city on Sunday.

Offline Carl

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Re: 40m NVIS for this coming Sunday
« Reply #222 on: March 09, 2015, 06:31:48 PM »
Sorry folks, but I had a range day and much needed escape from the city on Sunday.

No big deal,we visit,shoot the bull and any are welcome.

Offline armymars

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Re: 40m NVIS for this coming Sunday
« Reply #223 on: March 10, 2015, 05:53:12 PM »
  OT I have a 1897 577 Martini Enfield, long lever, with solid head brass if you need me to shoot the bull. 750gr Barnes bullet at 1700 fps. The gun weighs 11 pounds, but it's not enough. Grin.

Offline Carl

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Re: 40m NVIS for this coming Sunday
« Reply #224 on: March 10, 2015, 06:00:13 PM »
I would rather use a knife to butcher it than to kill,cook,and quarter it with a firearm...all in one shot.

Offline chad

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Re: 40m NVIS for this coming Sunday
« Reply #225 on: March 10, 2015, 06:32:51 PM »
  OT I have a 1897 577 Martini Enfield, long lever, with solid head brass if you need me to shoot the bull. 750gr Barnes bullet at 1700 fps. The gun weighs 11 pounds, but it's not enough. Grin.

Carl, it looks like we got more eye's on the Sunday 40 NVIS post....but... I'm not looking forward to "armymars" incoming 750gr transmission.

Offline armymars

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Re: 40m NVIS for this coming Sunday
« Reply #226 on: March 11, 2015, 12:40:07 PM »
  If we go PSK31 I promise to limit myself to 20 watts.

Offline chad

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Re: 40m NVIS for this coming Sunday
« Reply #227 on: March 13, 2015, 09:04:24 AM »
Been reading up on psk31, it's range is 600-2300 HZ, last time we tried I think we tried feq 7.025 KHZ so I'd have dial the psk31 to feq 725 right?

Offline Carl

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Re: 40m NVIS for this coming Sunday
« Reply #228 on: March 13, 2015, 09:19:34 AM »
Been reading up on psk31, it's range is 600-2300 HZ, last time we tried I think we tried feq 7.025 KHZ so I'd have dial the psk31 to feq 725 right?

Phase Shift Keying (PSK) is an audible ,narrow band signal. If I send at 14.070 and a PSK 'sound' at 2,000 ...then you will hear a 2000 HZ noise at 14.070. While I actually am sending at 14.072. If you tune exactly my frequency(14.072)...you hear NOTHING.

Link to see video.You hear PSK in the video.

https://www.youtube.com/watch?v=8VtRBO_cBB8

Offline chad

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Re: 40m NVIS for this coming Sunday
« Reply #229 on: March 13, 2015, 10:49:52 AM »
Phase Shift Keying (PSK) is an audible ,narrow band signal. If I send at 14.070 and a PSK 'sound' at 2,000 ...then you will hear a 2000 HZ noise at 14.070. While I actually am sending at 14.072. If you tune exactly my frequency(14.072)...you hear NOTHING.

Link to see video.You hear PSK in the video.

https://www.youtube.com/watch?v=8VtRBO_cBB8


That helped...

Let's see if I got this.

My SW radio is tuned to your feq and my psk31 is listening to my SW and I'm watching for a white line to cascading down the waterfall, then I click on the white line and pray..

Offline Carl

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Re: 40m NVIS for this coming Sunday
« Reply #230 on: March 13, 2015, 10:59:07 AM »
That sounds right.

Offline chad

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Re: 40m NVIS for this coming Sunday
« Reply #231 on: March 13, 2015, 11:18:34 AM »
That sounds right.


Ok, we'll test Sunday.

Offline armymars

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Re: 40m NVIS for this coming Sunday
« Reply #232 on: March 13, 2015, 04:51:29 PM »
  On 40 meters psk hangs out at 7.070 plus or minus.

Offline chad

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Re: 40m NVIS for this coming Sunday
« Reply #233 on: March 13, 2015, 06:22:34 PM »
Phase Shift Keying (PSK) is an audible ,narrow band signal. If I send at 14.070 and a PSK 'sound' at 2,000 ...then you will hear a 2000 HZ noise at 14.070. While I actually am sending at 14.072. If you tune exactly my frequency(14.072)...you hear NOTHING.

Link to see video.You hear PSK in the video.

https://www.youtube.com/watch?v=8VtRBO_cBB8

I'm confused again....

If you send at 14.070 (ham radio) is there a separate device that sends the PSK 'sound' or is that sound within the 14.070 ham transmission?



Offline Alan Georges

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Re: 40m NVIS for this coming Sunday
« Reply #234 on: March 13, 2015, 07:15:02 PM »
I'm confused again....

If you send at 14.070 (ham radio) is there a separate device that sends the PSK 'sound' or is that sound within the 14.070 ham transmission?

The PSK tone is in the upper sideband of the 14.070 transmission.  In Carl's example, as he said, the tone will be at 14.072, but you tune for 14.070 and let the receiver's bandwidth scoop up the signal.

Let's back up for a minute.  Imagine you're listening to plain ol' broadcast AM radio, on say, 1.600 MHz (or as AM dials usually and equivalently put it, 1600 kHz).  There's an upper and a lower sideband that extends plus-or-minus about 4 khz, and those are what carry the sound.  So the whole signal runs from about 1.596 to 1.604 MHz.  You still set the receiver to 1.600 MHz, and let the bandwidth scoop up the rest of the signal.

In our ham radio case, you only have the upper sideband; no carrier, and no lower sideband.  What's more, instead of a bunch of frequencies containing a voice or something from nearly 0 up to say 3 kHz, there's only a narrow range (~35 Hz) of frequencies containing the PSK31 signal.  But it's still within the receiver's bandwidth at 14.072 MHz, and it still gets through the radio and into whatever digital processor you're using.  The radio's taking in everything from 14.070 up to about 14.073, and that's what's on the waterfall display.

Bottom line: set your receiver on 14.070 USB.  Open up any bandwidth filters fairly wide, say 3 kHz or so.  Listen for the whistling tones.  When you can receive those, pipe it into whatever you're using to decode.

Offline chad

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Re: 40m NVIS for this coming Sunday
« Reply #235 on: March 13, 2015, 08:18:56 PM »
Phase Shift Keying (PSK) is an audible ,narrow band signal. If I send at 14.070 and a PSK 'sound' at 2,000 ...then you will hear a 2000 HZ noise at 14.070. While I actually am sending at 14.072. If you tune exactly my frequency(14.072)...you hear NOTHING.

Link to see video.You hear PSK in the video.

https://www.youtube.com/watch?v=8VtRBO_cBB8


The PSK tone is in the upper sideband of the 14.070 transmission.  In Carl's example, as he said, the tone will be at 14.072, but you tune for 14.070 and let the receiver's bandwidth scoop up the signal.

Let's back up for a minute.  Imagine you're listening to plain ol' broadcast AM radio, on say, 1.600 MHz (or as AM dials usually and equivalently put it, 1600 kHz).  There's an upper and a lower sideband that extends plus-or-minus about 4 khz, and those are what carry the sound.  So the whole signal runs from about 1.596 to 1.604 MHz.  You still set the receiver to 1.600 MHz, and let the bandwidth scoop up the rest of the signal.

In our ham radio case, you only have the upper sideband; no carrier, and no lower sideband.  What's more, instead of a bunch of frequencies containing a voice or something from nearly 0 up to say 3 kHz, there's only a narrow range (~35 Hz) of frequencies containing the PSK31 signal.  But it's still within the receiver's bandwidth at 14.072 MHz, and it still gets through the radio and into whatever digital processor you're using.  The radio's taking in everything from 14.070 up to about 14.073, and that's what's on the waterfall display.

Bottom line: set your receiver on 14.070 USB.  Open up any bandwidth filters fairly wide, say 3 kHz or so.  Listen for the whistling tones.  When you can receive those, pipe it into whatever you're using to decode.

Thank you both, +2


I'll spend time  reading and rereading your posts, I should be up to speed Sunday.






Offline Alan Georges

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Re: 40m NVIS for this coming Sunday
« Reply #236 on: March 14, 2015, 06:55:44 PM »
Tomorrow's forcast:

40m SSB:


20m SSB:



40m PSK31:

20m PSK31:


So... ya wanna do PSK31?  Or stick to SSB?

If we go with PSK31, I suggest that we move off the main PSK frequencies by, say, 5kHz.  Do we even have enough PSK31-capable people out there to bother trying?

Offline Carl

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Re: 40m NVIS for this coming Sunday
« Reply #237 on: March 14, 2015, 07:02:32 PM »
We are testing stuff,so let's not give up before we try ,remember NVIS is not normal propagation.

Offline chad

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Re: 40m NVIS for this coming Sunday
« Reply #238 on: March 14, 2015, 07:48:12 PM »
Quote
we go with PSK31, I suggest that we move off the main PSK frequencies by, say, 5kHz.  Do we even have enough PSK31-capable people out there to bother trying?

Let's try...



Offline Alan Georges

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Re: 40m NVIS for this coming Sunday
« Reply #239 on: March 14, 2015, 10:19:16 PM »
We are testing stuff,so let's not give up before we try ,remember NVIS is not normal propagation.
Hey, I wasn't saying "automatic fail, all quit and go home"!  I was just asking if anybody else here had PSK31 and would be listening.  I mean, I can always dial up a bunch of random 20m PSK contacts in Cuba anytime, but it's Y'ALL who I want to talk to.

OK, so...  let's do PSK31 tomorrow!