We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissable in your locale.

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - Ed H

Pages: [1] 2 3 4 5 6 7 8 9
1
22 Meter Band HiFER Beacons / Re: Strong RTTY or similar on 22m
« on: July 15, 2023, 0828 UTC »
Apologies - I miss typed and had meant to say that I would expect encryption, but got myself tangled!

Only brief monitoring has been possible, so my observations aren't comprehensive, but I have heard nothing of this signal while in the UK

2
22 Meter Band HiFER Beacons / Re: Strong RTTY or similar on 22m
« on: July 04, 2023, 1928 UTC »
When I last listened (earlier this week), this signal still pops up, and seems well established. I'm in the UK at the moment, so will take a little time to listen for it here.

Interesting effort on the decode, thanks for that. I suspect it would be unlikely that anything transmitting in this "band" would be encrypted, but it's still interesting to know the mode used.

Ed

3
HF Beacons / Re: 4663 kHz dash/chirp
« on: July 03, 2023, 0437 UTC »
Sorry, was slow to get back to this.  I heard the signal from the SF Peninsula, near Stanford University. 

Not heard again since my initial report - listening opportunities coincided with poor conditions.

Ed

4
HF Beacons / 4663 kHz dash/chirp
« on: June 11, 2023, 2015 UTC »
I'm hearing a rough chirp beacon/marker  at 4553 kHz (USB). This repeats approximately on a 4 sec period. There's a slight descent in th enote, which is also wavery/fluttery. Additionally, the starting pitch seems to vary a little.  Peaking arounf S5 received on the random wire dipole.


5
22 Meter Band HiFER Beacons / Re: What have I got myself into?
« on: April 04, 2023, 2049 UTC »
Welcome to 22m. For such a tiny sliver of HF spectrum, it is rather an interesting place. With the improved propagation over the last couple of years, there's been a lot of activity. Some is sort of formalised, then as you have noted, there are other signals that defy explanation.

Ed (HiFER beacon PVC, 13,555.5xx kHz)

6
22 Meter Band HiFER Beacons / Re: AN HIFER BEACON
« on: April 04, 2023, 2044 UTC »
I heard AN last week (3/30 and 3/31) via the KFS SDR.

7
22 Meter Band HiFER Beacons / Re: Strong RTTY or similar on 22m
« on: March 28, 2023, 2321 UTC »
Thanks folks.

Yes, the KFS SDR is a reliable way to hear these signals. I'm further South but have also heard them while monitoring HiFERs. I can certainly record some audio, and also have a go at decoding.

Ed

8
22 Meter Band HiFER Beacons / Strong RTTY or similar on 22m
« on: March 17, 2023, 1850 UTC »
Hi Folks,

Lately, I've been noticing strong RTTY (or similar FSK mode) signals within the ISM 22m band - at least two sources were apparent last weekend (11/12 March 23). Please add your observations to this thread.

Thanks

Ed

9
22 Meter Band HiFER Beacons / Whooper
« on: October 31, 2022, 1709 UTC »
Observed 30th Oct 22 "Whooper" signal Circa 13,555.200. A rising tone when heard in USB mode. Seems to be on for a short while, 5-10 minutes then disappear, rather than fade in and out.

Ed

10
Equipment / Re: The secret antenna of the Russian Amateur Unlis Radio 27 Oct 2022
« on: October 28, 2022, 2217 UTC »
From what I've read, and understand from my education, it is based on flawed physics. Although the antenna might radiate, it is not because of the theory claimed for it.

Basically, you cannot make EM radiation by creating separate magnetic and electric fields. Radiation is created in the form of linked E and H fields by the fundamental physics of accelerating charge. You can't force that link to happen from separate sources.

A good run down on some of the details here, along with why it appears to work https://www.w8ji.com/e-h_antenna.htm


11
22 Meter Band HiFER Beacons / Re: TSN
« on: October 28, 2022, 2003 UTC »
TSN has been a regular during weekend monitoring here on the Left Coast. Certainly up to 22/23 Oct. Using the Belka DX portable and its 29" telescopic antenna, TSN was audible during during fade-ups on the 23rd, early evening PDT. AZ was also heard during the same session.

EH

12
22 Meter Band HiFER Beacons / Re: TSN
« on: September 26, 2022, 2128 UTC »
TSN was prominent during 22m monitoring this weekend. Long periods of audibility here on the SF Peninsula. Random wire dipole transformer matched to 75 Ohm Coax. RX used on this occasion was Icom R-72.

13
The RF Workbench / Re: Turn Off the Stereo and See What Happens? Radio World???
« on: September 08, 2022, 1613 UTC »
Interesting. With digital quality (whatever that is..) everywhere, no-one knows much about the analogue world, except perhaps for a few vinyl enthusiasts. I recently restored a Fisher receiver, and had to learn about how the FM stereo circuitry operated, to understand what was really going on in the alignment of the MPX decoder, and its correct operation. This being mid 60's equipment (of quality), the selector allowed for Mono, MPX permanently active and an automatic mode driven by a detector for the 19kHz pilot. Nicely implemented, and very effective in practice.

14
22 Meter Band HiFER Beacons / Re: Midnight Hifers
« on: August 23, 2022, 1735 UTC »
That would certainly tally with recent observations. Very interesting, Thanks!

15
22 Meter Band HiFER Beacons / Re: Midnight Hifers
« on: August 16, 2022, 0010 UTC »
It is quite repeatable, even. Monitoring over 13th/14th August this weekend demonstrated beacon reception and WSPR decodes throughout the night.

Pages: [1] 2 3 4 5 6 7 8 9

Item image   Antenna Impedance Matching by Wilfred N. Caron - ARRL

 $24.95