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Messages - ultravista

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61
I plan on installing an under the eaves horizontal loop antenna for receive only. The wire is spooled so I don't know the exact length but I estimate it to be 250 - 300 feet.

The wire 'mount' is a long screw to bring the wire off the wood. I wrapped the wire once around the screw to keep it taught until the next screw.

A few questions:
1) For a receive only loop, what is the best way to attach the coax feedline?
2) Which is better - using it as a long wire (free terminating end) or a loop (coax attached to each end)?
3) Would a dipole (terminated or not) perform better than the random length wire or not?
4) Does wrapping the wire around the screw 1 time affect performance?

Looking for feedback on making this antenna efficient.

62
In Windows 10, Line 1 (VAC) is the primary playback device - not recording device. FLDIGI is configured with Line 1 (VAC) for capture. When I change the SDR output to Line 1 (VAC), the waterfall display in FLDIGI  does display the signal; however, it does not decode anything until I enable the Audio Repeater for Line 1 (VAC).

Should VAC be setup for playback or recording?

63
I hope someone w/experience can help with this problem.

To the best of my knowledge, the Audio Repeater isn't necessary for FLDIGI to work.

64
I am running Windows 10 with HDSDR & FLDIGI configured with VAC 4.51.

FLDIGI is configured for the VAC Line 1 and can 'see' the data streams from HDSDR when Windows 10 pipes the audio through VAC Line 1. This configuration appears to be working; however, the output of the FLDIGI decoder is gibberish.

For example, CW is unreadable despite being tuned properly in HDSDR and FLDIGI. Squelch on/off doesn't matter - everything is trash.

The FLDIGI decoder becomes legible only if I enable the Audio Repeater (KS) that comes with FLDIGI. When running, the FLDIGI ouput appears to be correct. Validated with WEFAX and CW.

In other words, FLDIGI only works properly with the Audio Repeater (KS) running; otherwise the output is trash.

I though the Audio Repeater was to pipe the audio elsewhere post FLDIGI, not into FLDIGI.

Does everyone else run the Audio Repeater too?

It doesn't make sense (to me) that I can see the signal in FLDIGI with and without the Audio Repeater running.

65
Equipment / FLDIGI w/HDSDR Controlled by a Yaesu-FT-950
« on: July 12, 2018, 2040 UTC »
I control HDSDR with a Yeasu-FT-950 via an RSP2 and OminiRIG. All is good here ...

I would like to use FLDIGI to decode digital modes. For reasons unknown, I cannot get anything into FLDIGI.

Nothing appears in the FLDIGI waterfall and the output screen is just a string of gibberish characters. The gibberish characters appear with and without the radio on.

Since the rig is controlled by OmniRIG, I cannot get rig control to work within FLDIGI. Not that big of a deal.

I would like FLDIGI to 'listen' in the background and decode what is hears. With that said, how the heck can I get this to work?

Using the machines microphone, and configured in FLDIGI, doesn't seem to do anything. I must me missing something and it is driving me nuts.

66
HF Beacons / Re: hiker 7998 khz
« on: July 07, 2018, 0344 UTC »
Hearing solid tones @ 7998 in Las Vegas, NV tonight.

67
Other / 6666.66 KHZ UNID CW
« on: July 01, 2018, 1548 UTC »
Received July 1 @ 8:40 AM PT from Southern Nevada.

68
I picked up what appears to be the same thing @ 6755.5 USB this evening (06/27/18) @ 9:20 PT in Las Vegas, NV.

69
I swear this sounds like HFDL at the beginning, bursts of 'hiss'. HFDL however is on published/fixed frequencies where these appear to be random. Kind of like the HF 'pips' that randomly appear across the dial. I wonder if the two are related ... they seem to be in the same RF space.

What perplexes me is the CW at the end of some. I don't know morse to translate it but it must be an identifier. Maybe amateur outside of the US?

71
The videos below are similar to some of the 'HFDL Like' signals. In addition to the freq's below, I tume them this evening at 8.321, 6.890, 6.663, 6250.5, 4949.5, and 4.720 KHZ.

6.890 KHZ - not much to see here but there is some activity.
https://youtu.be/PDz3Ca9Zp48

7970 KHZ - bursts followed by solid noise
https://youtu.be/ljFAixDImXk

7971 5 KHZ - in CW mode
https://youtu.be/w5wOrLgcNPw

7971 5 KHZ - in CW mode, you can see the CW near the end of the video
https://youtu.be/bQ71Fnz4zeY

What is the best way to also capture audio? I am tuning with a Yeasu FT-590 with a IF tap connected to an RSP2 for the waterfall display. The audio is out of the Yeasu. Turning up the volume on the Yeasu and using the laptop microphone doesn't produce a good sound - the microphone picks up every noise in the house, including a mantle clock ticking and me breathing.


72
Josh, the frequencies vary. I do not find any Google matches for the frequencies either.

The few I heard this morning had CW before or after the transmission. Just a few seconds, probably an identifier.

In Las Vegas, NV, I find these signals day and night using an active mini-whip antenna.

I'll grab screenshots or a video next time.

73
I regularly tune unknown data signals from 5-9 MHZ (possibly higher). It sounds like HDFL (bursts of uniform 'hiss') that may or may not include anything other that the bursts.

I have found a few have CW either before or after, can't tell which, but probably at the end of the transmission.

The waterfall pattern width is about as wide as  HFDL or STANAG.

I have listened to the identified signals in the WIKI and can't narrow this down.

74
MW 73?

Please explain, harmonic from a medium wave station?

75
I am receiving this station tonight on 4170 khz USB in Las Vegas, NV on a Yeasu FT-950 w/mini-whip active antenna.

Have you determined the origin of the broadcast?

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