Messages

1

HF Mystery Signals / Re: HF UNID, 4476KHz center, 1432khz BW from 3760 to 5192KHz, 4khz carrier spacing

« on: March 03, 2023, 1959 UTC »

The nearest public Kiwi is swamped in it's own broadband QRM in that bit of spectrum.

 The rest of the mapped kiwis are 60+ miles away, no discernable signal on them.

I did get a bearing on it with my flag antenna, The strong null points off into empty field, by the map the nearest structure is over half a mile away. If the weather clears and I get the farm chores done I'll do a bit of driving and see if I can get additional bearings.

2

HF Mystery Signals / Re: HF UNID, 4476KHz center, 1432khz BW from 3760 to 5192KHz, 4khz carrier spacing

« on: March 01, 2023, 1643 UTC »

That is really bad local RFI (interference).

Well, I was able to verify that whatever it is, it's not local. We had an area power outage and it is as strong as ever using the IC-705.

When I get my noise flag from DXE I'll see if I can take a direction on it.

A power outage doesn’t always eliminate local QRM. For example, it could be a device in a home with a generator.

I don't think I defined local well enough, in this case myself and the immediate neighbors (300 yard radius). Nobody in that radius has an automatic standby generator so there is a fairly reliable period of outage before everyone hauls out their portables. And since it was mid-day with many at work, I don't think anybody actually started their sets.

I've done a fair bit of RFI hunting, this one just still has too many signal qualities for me to write it off as noise just yet hence the inquiry. Though reality often points to the boring answer.

3

HF Mystery Signals / Re: HF UNID, 4476KHz center, 1432khz BW from 3760 to 5192KHz, 4khz carrier spacing

« on: February 28, 2023, 1634 UTC »

That is really bad local RFI (interference).

Well, I was able to verify that whatever it is, it's not local. We had an area power outage and it is as strong as ever using the IC-705.

When I get my noise flag from DXE I'll see if I can take a direction on it.

4

HF Mystery Signals / Re: HF UNID, 4476KHz center, 1432khz BW from 3760 to 5192KHz, 4khz carrier spacing

« on: February 10, 2023, 2153 UTC »

Bumping this since It's still on my mind, and it's still persistent in the same spot with the same intervals.

Best observed to my knowledge on this kiwi: http://nd8dkiwi.ddns.net/

5

HF Mystery Signals / HF UNID, 4476KHz center, 1432khz BW from 3760 to 5192KHz, 4khz carrier spacing

« on: August 04, 2022, 1359 UTC »

A very wide discernable signal on the waterfall, with "carriers" every 4Khz.
First carrier at 3760KHz last carrier at 5192Khz
13:46UTC 8/4/22 ongoing
Bursts up to 18 seconds long, some as short as 2 seconds long, the transmissions are occurring no more than 20 seconds apart.

I have a recording taken in IQ mode centered on the first carrier, some screenshots of the waterfall showing the definition of the signal.

Receiver is my own KIWI SDR and 160M inverted V in Ohio.

6

Amateur Radio / Re: 2M SSB

« on: August 27, 2020, 2358 UTC »

All this 2M SSB talk is making me want to get a 2M beam for my 50' tower build coming up. I'll have more than enough wild load and rotator capacity to put a sizeable 2M beam under the hexbeam.

7

North American Shortwave Pirate / Re: Unid 4085 am 0142 utc 16 Aug 2020

« on: August 16, 2020, 0153 UTC »

10db over S9 into SW ohio.

8

North American Shortwave Pirate / Re: Captain Morgan Shortwave 6925 AM 0125 UTC 16 Aug 2020

« on: August 16, 2020, 0151 UTC »

Decent into SW Ohio, S8-9 on the vertical.

9

North American Shortwave Pirate / Re: X-FM 6285 AM 0218 UTC 19 JUL 2020

« on: July 19, 2020, 0248 UTC »

Coming in decently to SW Ohio. Finally something good to use the kiwi's synchronous AM on.

10

North American Shortwave Pirate / Re: XFM 4185 AM 0100 UTC 25 JAN 2020

« on: January 25, 2020, 0212 UTC »

Gotta say the propagation has been very kind to you this evening, goes to show how powerful it is, even with the low power.

11

North American Shortwave Pirate / Re: XFM 4185 AM 0100 UTC 25 JAN 2020

« on: January 25, 2020, 0204 UTC »

We are up.  Antenna is screwed, the harmonic filter is broken, but the show must go on!

+-RH

Well, I don't hear you on 8370 or 12555 so we're good!

12

North American Shortwave Pirate / XFM 4185 AM 0100 UTC 25 JAN 2020

« on: January 25, 2020, 0201 UTC »

With an intriguing opening track, it's Redhat.

edit: Actually sounds like a bed, maybe I caught him testing.

edit2: Standby placeholder/message

59+10 in SW Ohio and a butternut HF2V vertical on 16 radials.

13

The RF Workbench / Re: High level SSB transmitter; and old dream come true.

« on: December 18, 2019, 1909 UTC »

I am on their list of beta testers. So far it's been crickets since early June.

I understand the challenges of small teams and hardware development, but updates would be nice.

14

North American Shortwave Pirate / Re: Radio Free Whatever 4185 from 6925 USB 2247 UTC 07 Dec 2019

« on: December 08, 2019, 0318 UTC »

Loud and clear in SW Ohio! Thanks for the show

15

The RF Workbench / Re: NCP driver sucks

« on: October 15, 2019, 1354 UTC »

I have used the NCP up to 7.290 in the past. Inverting and non-inverting. What keeps them from frying is a few ohms between the driver and the SiC gate.