Date   

Re: Portable Ultralight Radio DXing Case - July 2021

Paul Blundell
 

Update - 20/08/2021:
 
After using this for the past month, I found that I was not carrying it with me as much as wanted, often I was just taking my AR-1733 in my work bag and not my whole kit. Due to this I have now made some changes to this, as can be seen below. I have removed some of the foam and have setup a smaller plastic case for this spot, this holds my AR-1733, ear phones and spare batteries. I can now easily just grab this as my "daily carry" or take the whole case for more serious DXing times.
 




 


Loggings - 20/08/2021

Paul Blundell
 

Time: 12:10am
Radio: Digitech AR-1733

-------------------------
**MWDxerDB - Report**
Report Date: 08/20/2021
Report Time: 13:09:31
-------------------------

Freq / Name: 0567 - 4JK
Details: Julia Creek - National -10000w
Notes: 20/08/2021 - ULDXIndex = 0.33012

Freq / Name: 0639 - 5CK
Details: Port Pirie - National - 10000w
Notes: 20/08/2021 - ULDXIndex = 0.28632

Freq / Name: 0657 - 2BY
Details: Byrock - National - 10000w
Notes: 20/08/2021 - ULDXIndex = 0.22762

Freq / Name: 0666 - 2CN
Details: Canberra - National - 5000w 
Notes: 20/08/2021 - ULDXIndex = 0.27018

Freq / Name: 0702 - 2BL
Details: Sydney - National - 50000w
Notes: 20/08/2021 - ULDXIndex = 0.03401

Freq / Name: 0738 - 2NR
Details: Grafton - National - 50000w 
Notes: 20/08/2021 - ULDXIndex = 0.054378 

Freq / Name: 1062 - 5MV
Details: Renmark/Loxton - National - 2000w
Notes: 20/08/2021 - ULDXIndex = 1.1772 

Freq / Name: 1179 - 3RPH
Details: Melbourne - Community - 5000w
Notes: 20/08/2021 - ULDXIndex = 0.2136 

Freq / Name: 1521 - 2QN
Details: Deniliquin - Commercial - 2000w
Notes: 20/08/2021 - ULDXIndex = 0.63935

 


Re: Retekess V-115 FM/AM/SW Radio Review – July 2021

Paul Blundell
 

I would have to agree with you. I have been using my AR-1733 more and this radio has taken a back seat.

Paul

On Fri, Aug 20, 2021 at 2:05 PM Frank Standford <dxer2k1@...> wrote:

I have given this some time but it has gone back, it simply was not usable.

I will be sticking with brand names from now on.



--
Paul


Re: Retekess V-115 FM/AM/SW Radio Review – July 2021

 

I have given this some time but it has gone back, it simply was not usable.

I will be sticking with brand names from now on.


Re: Interesting FM Reception - Your thoughts?

kevin asato
 

FM translators are intended to act as repeaters to fill in coverage for areas for a local AM or FM broadcaster. Television has similar translators as well. For traditional analog broadcast, the translators will have to be on different frequencies to minimize interference between overlap areas. The original poster had indicated hearing a lag in signals between different transmission sites which would not be tolerable when in the overlap area between two sites and trying to hear through the delay.

With digital (HD) transmission, it is possible to have translators operating on the same frequency as the original/main transmitter due to advanced timing techniques to approximate a near simultaneous broadcast similar to what you would experience going between cell site handoffs.

73,
kevin
kc6pob

On Tue, Aug 17, 2021 at 11:52 AM Johnny via groups.io <jlochey=yahoo.com@groups.io> wrote:
Hi Peter,

Great points!  Thanks for your thoughts!  Very insightful.

I am currently "mapping my local FM dial" in my area (Michigan, US).

Right now I've only "mapped" what is normally on the band from 88.7 to 97.7 MHZ.  So my previous comment was a very high level observation based on a gross perception of the dial population as a whole.

I should be able to understand the "state of things" on the dial in my area after I completely "map" my local dial.


Johnny


Re: File /Guide to Airband Radio Listening .pdf uploaded #file-notice

Paul Blundell
 

Thanks Jock.

My AR-1733 has ATS but won't scan programmed channels. I will add that in to my next update of this file.

On Wed, 18 Aug 2021, 21:09 Jock Elliott, <jock.elliott@...> wrote:

[Edited Message Follows]

Paul,

Excellent guide!

I don't know if you want to get into this level of detail, but some ultralights have the capacity to "scan and store" AIR frequencies, so that they can can scan the air band and store the active frequencies that are discovered. Obviously this is not a perfect system for discovering active air frequencies, since -- except for ATIS -- they are intermittent, but it is still a useful tool The CCrane Skywave SSB does this with ATS system (automatic tuning system). Further, if you press the UP and DOWN arrows at the same time on the Skywave SSB in the AIR band, the radio will scan memories 1-0 on page 1 of the AIR memories. (The Skywave SSB has 400 memories, 100 for each band: AM, FM, AIR, SW.) I don't know if other ultralights can do this.


Log: 7600 kHz Afghanistan International TV - audio feed 1900 UTC, 17/8 and 18/8 on Tecsun PL-380

Wolfgang von Poellnitz
 

Shortwave still a good opportunity from time to time although the background more than sad. Here in Europe / Austria I could pick-up yesterday first time AITV audio signal on 7600 kHz. Firstly on my maindeck receiver Tecsun PL990X with telescopic whip plus passive preselector with O=3 and heard until 2200+ UTC. Why here in this forum? The pretty same result I got with my PL-380 just putting to the windowsill facing to the east. As we know from today the transmitter is most likely in Armenia. The AITV operation by Volant Media UK started over night, now highly visible, more details at www.afintl.com

73 Wolfgang von Poellnitz
QTH JN88IC
Lower Austria
Tecsun PL-380, PL-990X, PL-880, Degen DE 1103 etc.


Re: File /Guide to Airband Radio Listening .pdf uploaded #file-notice

Jock Elliott
 
Edited

Paul,

Excellent guide!

I don't know if you want to get into this level of detail, but some ultralights have the capacity to "scan and store" AIR frequencies, so that they can can scan the air band and store the active frequencies that are discovered. Obviously this is not a perfect system for discovering active air frequencies, since -- except for ATIS -- they are intermittent, but it is still a useful tool The CCrane Skywave SSB does this with ATS system (automatic tuning system). Further, if you press the UP and DOWN arrows at the same time on the Skywave SSB in the AIR band, the radio will scan memories 1-0 on page 1 of the AIR memories. (The Skywave SSB has 400 memories, 100 for each band: AM, FM, AIR, SW.) I don't know if other ultralights can do this.


Re: XHDATA D-808 external antenna jack question

rezeiwer
 


File /Guide to Airband Radio Listening .pdf uploaded #file-notice

main@UltralightDX.groups.io Notification <noreply@...>
 

The following files have been uploaded to the Files area of the main@UltralightDX.groups.io group.

By: Paul Blundell <tanger32au@...>

Description:
Guide to Airband Listening on Ultralight Radios.


Re: Interesting FM Reception - Your thoughts?

Hank Lambert (KB4MTO)
 

Sounds like a possibility to me.

 

When I was growing up, my best friend was a DJ at a country station. We had just graduated high school and he was going to college for broadcasting marketing/management. His station went from local play to a programmed service like you said. He went from playing their own schedule as a DJ to monitoring the new programmed service. So, what you found sounds like it could be the reason.

 

73,

 

--Hank

 

 

 

From: main@UltralightDX.groups.io <main@UltralightDX.groups.io> On Behalf Of Johnny via groups.io
Sent: Tuesday, August 17, 2021 8:07 AM
To: main@UltralightDX.groups.io
Subject: [UltralightDX] Interesting FM Reception - Your thoughts?

 

Hi all,

I had an interesting FM reception the other day.

I had two radios of similar ability tuned to the same frequency, 95.9 MHZ.

Each radio was receiving the same exact content, which was country music programming.

The interesting thing about this reception was that the music was delayed by about 15 seconds on one of the radios.

I thought to myself, "how is this even possible"...  Same frequency, same music, same everything...

Not so!

I investigated and found that from my location in Michigan, USA I was actually receiving two separate stations on the same frequency, one radio was receiving station #1 on 95.9 MHZ and the other radio was receiving station #2 on 95.9 MHZ.  Station #1 was identified an FM translator station located in Jackson, Michigan, about 44 miles from my house.  Station #2 was identified as an FM station located in Windsor, Ontario in Canada, about 75 miles from my house.

I can only guess that both stations "purchase" the same programming content from the same provider and were broadcasting it at "roughly" the same time of day, hence the slight 15 sec time delay?

What are your thoughts?

Thank you!

Johnny


Re: Interesting FM Reception - Your thoughts?

Johnny
 

Hi Peter,

Great points!  Thanks for your thoughts!  Very insightful.

I am currently "mapping my local FM dial" in my area (Michigan, US).

Right now I've only "mapped" what is normally on the band from 88.7 to 97.7 MHZ.  So my previous comment was a very high level observation based on a gross perception of the dial population as a whole.

I should be able to understand the "state of things" on the dial in my area after I completely "map" my local dial.


Johnny


Re: Interesting FM Reception - Your thoughts?

Peter Laws
 

On Tue, Aug 17, 2021 at 1:19 PM Johnny via groups.io
<jlochey=yahoo.com@groups.io> wrote:

Hi Peter,

Regarding the "Dead Man Walking" statement...

I'm surprised at this statement as my FM dial has NEVER been busier in my lifetime... There are literally no free frequencies along the whole dial.

Somebody MUST be listening?

(I am assuming you are in the USA)

The FCC has given an FM translator to pretty much any AM station that
asks (not quite, but close). The industry has failed to make good use
of and promote HDRadio technology and has put many of the HDRadio
channels on their main FM signal on FM translators. This is why your
dial is full.

Here in the OKC market, it is not so full, but I'd be curious to hear
what you would find if you made a log of every FM station in your area
and then grouped them by programming. How many of those separate
signals are playing the same stuff (talk, music, whatever). I have at
least three stations on my dial that all play the same NPR programming
and a 4th that carries their new, for example.

It's all very sad.



--
Peter Laws | N5UWY | plaws plaws net | Travel by Train!


Re: Interesting FM Reception - Your thoughts?

Johnny
 

Hi Peter,

Regarding the "Dead Man Walking" statement...

I'm surprised at this statement as my FM dial has NEVER been busier in my lifetime...  There are literally no free frequencies along the whole dial.

Somebody MUST be listening?

Johnny


Re: Interesting FM Reception - Your thoughts?

Peter Laws
 

On Tue, Aug 17, 2021 at 7:07 AM Johnny via groups.io
<jlochey=yahoo.com@groups.io> wrote:

I can only guess that both stations "purchase" the same programming content from the same provider and were broadcasting it at "roughly" the same time of day, hence the slight 15 sec time delay?

What are your thoughts?

My thoughts are that the radio industry may be in a "dead man walking"
situation. Very sad. So many now, literally, play the same thing
with the only variation being what little local advertising they can
sell. And nobody listens so they can't sell it for much.


--
Peter Laws | N5UWY | plaws plaws net | Travel by Train!


Re: Interesting FM Reception - Your thoughts?

Robert Conboy
 

Not hard to believe.


FM Capture ratios are only a few dB, meaning one co-channel signal only needs to be a few dB higher to silence reception of the other.


Multipath reception is simply that: signals taking more than one path to a location. When the signals arrive out of phase, they can cancel each other out, resulting in selective attenuation. At MW frequencies, this can be a groundwave and skywave from the same station. At FM (VHF) it can be direct and a reflected off a building, mountain, or even an airplane.


With FM wavelengths of only a few meters, a multipath null from a station may exist in a space measured in a few inches. One radio’s antenna was likely sitting in a multipath null that attenuated the closer station, enabling reception of the more distant station.


The other radio would simply be receiving the more local station.


On Aug 17, 2021, at 9:11 AM, Russ Edmunds <wb2bjh@...> wrote:


Capture effect may or may not be applicable to a case of two receivers.  Since two receivers ( with internal antennas ) cannot occupy the same space, it is possible for them to receive different signals because of that fact. This is similar to the case where you have one receiver and move it around within a small area and receive two or more signals on the same channel as the receiver moves.

The initial observation of two stations using the same program source ( most probably via satellite ) with a slight time offset is quite reasonable and not infrequently observed. This may be due to one station introducing a slight delay, or possibly even by propagation effects

Russ Edmunds

WB2BJH

Blue Bell, PA

Grid FN20id


From: main@UltralightDX.groups.io <main@UltralightDX.groups.io> on behalf of Paul Blundell via groups.io <tanger32au@...>
Sent: Tuesday, August 17, 2021 9:05 AM
To: main@ultralightdx.groups.io <main@ultralightdx.groups.io>
Subject: Re: [UltralightDX] Interesting FM Reception - Your thoughts?
 
That is interesting. Due to the FM capture effect (https://en.m.wikipedia.org/wiki/Capture_effect), you should only hear the strongest signal. It is strange that two radios would demodulate different FM signals.

On Tue, 17 Aug 2021, 22:07 Johnny via groups.io, <jlochey=yahoo.com@groups.io> wrote:
Hi all,

I had an interesting FM reception the other day.

I had two radios of similar ability tuned to the same frequency, 95.9 MHZ.

Each radio was receiving the same exact content, which was country music programming.

The interesting thing about this reception was that the music was delayed by about 15 seconds on one of the radios.

I thought to myself, "how is this even possible"...  Same frequency, same music, same everything...

Not so!

I investigated and found that from my location in Michigan, USA I was actually receiving two separate stations on the same frequency, one radio was receiving station #1 on 95.9 MHZ and the other radio was receiving station #2 on 95.9 MHZ.  Station #1 was identified an FM translator station located in Jackson, Michigan, about 44 miles from my house.  Station #2 was identified as an FM station located in Windsor, Ontario in Canada, about 75 miles from my house.

I can only guess that both stations "purchase" the same programming content from the same provider and were broadcasting it at "roughly" the same time of day, hence the slight 15 sec time delay?

What are your thoughts?

Thank you!

Johnny


Re: Interesting FM Reception - Your thoughts?

Russ Edmunds
 

Capture effect may or may not be applicable to a case of two receivers.  Since two receivers ( with internal antennas ) cannot occupy the same space, it is possible for them to receive different signals because of that fact. This is similar to the case where you have one receiver and move it around within a small area and receive two or more signals on the same channel as the receiver moves.

The initial observation of two stations using the same program source ( most probably via satellite ) with a slight time offset is quite reasonable and not infrequently observed. This may be due to one station introducing a slight delay, or possibly even by propagation effects

Russ Edmunds

WB2BJH

Blue Bell, PA

Grid FN20id


From: main@UltralightDX.groups.io <main@UltralightDX.groups.io> on behalf of Paul Blundell via groups.io <tanger32au@...>
Sent: Tuesday, August 17, 2021 9:05 AM
To: main@ultralightdx.groups.io <main@ultralightdx.groups.io>
Subject: Re: [UltralightDX] Interesting FM Reception - Your thoughts?
 
That is interesting. Due to the FM capture effect (https://en.m.wikipedia.org/wiki/Capture_effect), you should only hear the strongest signal. It is strange that two radios would demodulate different FM signals.

On Tue, 17 Aug 2021, 22:07 Johnny via groups.io, <jlochey=yahoo.com@groups.io> wrote:
Hi all,

I had an interesting FM reception the other day.

I had two radios of similar ability tuned to the same frequency, 95.9 MHZ.

Each radio was receiving the same exact content, which was country music programming.

The interesting thing about this reception was that the music was delayed by about 15 seconds on one of the radios.

I thought to myself, "how is this even possible"...  Same frequency, same music, same everything...

Not so!

I investigated and found that from my location in Michigan, USA I was actually receiving two separate stations on the same frequency, one radio was receiving station #1 on 95.9 MHZ and the other radio was receiving station #2 on 95.9 MHZ.  Station #1 was identified an FM translator station located in Jackson, Michigan, about 44 miles from my house.  Station #2 was identified as an FM station located in Windsor, Ontario in Canada, about 75 miles from my house.

I can only guess that both stations "purchase" the same programming content from the same provider and were broadcasting it at "roughly" the same time of day, hence the slight 15 sec time delay?

What are your thoughts?

Thank you!

Johnny


Re: Interesting FM Reception - Your thoughts?

Paul Blundell
 

That is interesting. Due to the FM capture effect (https://en.m.wikipedia.org/wiki/Capture_effect), you should only hear the strongest signal. It is strange that two radios would demodulate different FM signals.


On Tue, 17 Aug 2021, 22:07 Johnny via groups.io, <jlochey=yahoo.com@groups.io> wrote:
Hi all,

I had an interesting FM reception the other day.

I had two radios of similar ability tuned to the same frequency, 95.9 MHZ.

Each radio was receiving the same exact content, which was country music programming.

The interesting thing about this reception was that the music was delayed by about 15 seconds on one of the radios.

I thought to myself, "how is this even possible"...  Same frequency, same music, same everything...

Not so!

I investigated and found that from my location in Michigan, USA I was actually receiving two separate stations on the same frequency, one radio was receiving station #1 on 95.9 MHZ and the other radio was receiving station #2 on 95.9 MHZ.  Station #1 was identified an FM translator station located in Jackson, Michigan, about 44 miles from my house.  Station #2 was identified as an FM station located in Windsor, Ontario in Canada, about 75 miles from my house.

I can only guess that both stations "purchase" the same programming content from the same provider and were broadcasting it at "roughly" the same time of day, hence the slight 15 sec time delay?

What are your thoughts?

Thank you!

Johnny


Interesting FM Reception - Your thoughts?

Johnny
 

Hi all,

I had an interesting FM reception the other day.

I had two radios of similar ability tuned to the same frequency, 95.9 MHZ.

Each radio was receiving the same exact content, which was country music programming.

The interesting thing about this reception was that the music was delayed by about 15 seconds on one of the radios.

I thought to myself, "how is this even possible"...  Same frequency, same music, same everything...

Not so!

I investigated and found that from my location in Michigan, USA I was actually receiving two separate stations on the same frequency, one radio was receiving station #1 on 95.9 MHZ and the other radio was receiving station #2 on 95.9 MHZ.  Station #1 was identified an FM translator station located in Jackson, Michigan, about 44 miles from my house.  Station #2 was identified as an FM station located in Windsor, Ontario in Canada, about 75 miles from my house.

I can only guess that both stations "purchase" the same programming content from the same provider and were broadcasting it at "roughly" the same time of day, hence the slight 15 sec time delay?

What are your thoughts?

Thank you!

Johnny


Loggings - 16/08/2021 - ULDXIndex

Paul Blundell
 

Time = 10:30pm
Radio = Digitech AR-1733 + 3" FSL

-------------------------
**MWDxerDB - Report**
Report Date: 08/17/2021
Report Time: 10:22:29
-------------------------

Freq / Name: 0729 - 5RN
Details: Adelaide - National - 50000w - 1030km 
Notes: 16/08/2021 - ULDXIndex = 0.0618 

Freq / Name: 0783 - 8AL
Details: Alice Springs - National - 2000w - 2315km
Notes: 16/08/2021 - ULDXIndex =1.6205 

Freq / Name: 0891 - 5AN
Details: Adelaide - National - 50000w - 1030km 
Notes: 16/08/2021 - ULDXIndex = 0.0618

Freq / Name: 1098 - 2RN
Details: Goulburn - National - 200w - 775km
Notes: 16/08/2021 - ULDXIndex = 7.3625 

Freq / Name: 1548 - 4QD
Details: Emerald - National - 50000w - 1996km
Notes: 16/08/2021 - ULDXIndex = 0.095808 

Freq / Name: 1566 - 3NE
Details: Wangaratta - Commercial - 5000w - 572km
Notes: 16/08/2021 - ULDXIndex = 0.3432 

741 - 760 of 32865