Date   

Re: Common Interference Sources

Chris Rogers
 
Edited

Most plug packs and chargers are of the Chinese switch mode variety which are a big source of RFI. The best way to isolate noise is to tune to the noise on your radio turn all your appliances (everything) off in the house and turn the power off at the meter box. If the interference is gone, turn the power back on and gradually turn appliances back on one at a time until you find the source. There could be multiple sources in the house. If the interference is still there when all the power is off in the house it must be coming in externally to the house, a neighbour or a power line etc. The majority of times it will be something in your house.


Common Interference Sources

Paul Blundell
 

I am currently trying to track down an interference source at home, it is not always an issue but of late I have noticed it both more often and stronger. Are charger generally getting worse as far as RFI goes?

Paul


Long Term DX Project - 06/06/2021

Paul Blundell
 

-------------------------
**MWDxerDB - Report**
Report Date: 06/07/2021
Report Time: 09:45:38

Details: 06/06/2021 - 22:15 / Home, Launceston Tasmania. 
Radio: Digitech AR-1733 / Aerial: Internal. A night time session at home. Signal were generally good however we did have a storm pass during this session and this causes a couple of stations at the lower end of the band to suffer a bit. Both HPON stations preformed well and I have found of late that they seem to generally provide good signals. 

Freq / Name: 00531 - 3GG
Details: Warragul - Commercial - 5KW 
Notes: 06/06/2021 - 5

Freq / Name: 00549 - 2CR
Details: Cumnock - National - 50KW 
Notes: 06/06/2021 - 4

Freq / Name: 00594 - 3WV
Details: Horsham - National - 50KW 
Notes: 06/06/2021 - 5

Freq / Name: 00621 - 3RN
Details: Melbourne - National - 50KW 
Notes: 06/06/2021 - 5

Freq / Name: 00774 - 3LO
Details: Melbourne - National - 50KW 
Notes: 06/06/2021 - 4

Freq / Name: 01053 - 2CA
Details: Canberra - Commercial - 5KW 
Notes: 06/06/2021 - 3

Freq / Name: 01179 - 3RPH
Details: Melbourne - Community - 5KW 
Notes: 06/06/2021 - 3

Freq / Name: 01341 - HPON GEELONG
Details: Geelong - HPON - 5KW
Notes: 06/06/2021 - 4

Freq / Name: 01422 - HPON MELBOURNE
Details: Melbourne - HPON - 5KW
Notes: 06/06/2021 - 4

Freq / Name: 01503 - 3KND
Details: Melbourne - Community - 5KW 
Notes: 06/06/2021 - 3


Sangean DT-250 ULR Receiver

Jorge Garzón
 


Re: Air Band Receivers

Paul Blundell
 

As I would like to have this on my desk at work, looking like an AM/FM radio avoids any questions...


On Sat, 5 Jun 2021, 02:39 Phil Pasteur via groups.io, <ppasteur=q.com@groups.io> wrote:
Hi Paul,
Purely out of curiosity, why is it important that  the device "looks" like a radio. I am sure you have good reasons for this, but I am missing it.

Phil


Re: Air Band Receivers

Phil Pasteur
 

Hi Paul,
Purely out of curiosity, why is it important that  the device "looks" like a radio. I am sure you have good reasons for this, but I am missing it.

Phil


Re: FM Translators - Why?

Peter Laws
 

On Fri, Jun 4, 2021 at 6:37 AM radiojayallen <radiojayallen@gmail.com> wrote:

One other aspect of this I haven't seen discussed (and forgive me if it was and I missed it) is what I would call The Tail Wagging The Dog". I have seen many cases where a struggling AM station was granted an FM translator, and since the two stations must carry the identical programming, the owners switch the format of the AM station to one they feel will be most successful on FM. I have seen many AM'ers which carried, say, Music Of Your life or oldies which changed to Adult Cpmtemporary or Rock which was a loss for the AM's listeners.

Time moves in only one direction as far as anyone can tell. I, for
one, welcome the return of music -- any music -- to the AM dial in
place of the usual garbage.


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


Re: Air Band Receivers

Paul Blundell
 

It sure does sound like it might fit the bill of what I have been looking for. 


On Fri, 4 Jun 2021, 22:11 Michael Schuster, <schuster.ma@...> wrote:
On Thu, Jun 3, 2021 at 07:25 PM, Paul Blundell wrote:
Thanks Michael, I will be keeping an eye out for when this is released.
 
Paul

On Thu, Jun 3, 2021 at 9:19 PM Michael Schuster <schuster.ma@...> wrote:
On Thu, Jun 3, 2021 at 12:08 AM, Paul Blundell wrote:
The HRD-747 sounds very interesting, does anybody know of any time frames around it being released.
It was supposed t have been released by April but I have not seen anything more than that initial look at an engineering prototype from February.
Paul,

I have always looked at do-it-all zero-to-light portable receivers with a jaundiced eye as they rarely perform as well in actual use. Starting with the Icom IC-R1 many, many years ago. But I think the adoption of DSP technology changes a lot of that for the better (look at all the cheap, competent, tiny SILabs based boxes for sale on Ali, eBay, and Amazon) so maybe this one will show that the designers actually learned from earlier efforts.

--mike
 


Re: FM Translators - Why?

Paul Blundell
 

That is a good point, it is sad when the variety of stations is lost.


On Fri, 4 Jun 2021, 21:37 radiojayallen, <radiojayallen@...> wrote:
One other aspect of this I haven't seen discussed (and forgive me if it was and I missed it) is what I would call The Tail Wagging The Dog". I have seen many cases where a struggling AM station was granted an  FM translator, and since the two stations must carry the identical programming, the owners switch the format of the AM station to one they feel will be most successful on FM. I have seen many AM'ers which carried, say, Music Of Your life or oldies which changed to Adult Cpmtemporary or Rock which was a loss for the AM's listeners.

I understand the reasoning for this...I just hate to see it.

jay


Re: Air Band Receivers

Michael Schuster
 

On Thu, Jun 3, 2021 at 07:25 PM, Paul Blundell wrote:
Thanks Michael, I will be keeping an eye out for when this is released.
 
Paul

On Thu, Jun 3, 2021 at 9:19 PM Michael Schuster <schuster.ma@...> wrote:
On Thu, Jun 3, 2021 at 12:08 AM, Paul Blundell wrote:
The HRD-747 sounds very interesting, does anybody know of any time frames around it being released.
It was supposed t have been released by April but I have not seen anything more than that initial look at an engineering prototype from February.
Paul,

I have always looked at do-it-all zero-to-light portable receivers with a jaundiced eye as they rarely perform as well in actual use. Starting with the Icom IC-R1 many, many years ago. But I think the adoption of DSP technology changes a lot of that for the better (look at all the cheap, competent, tiny SILabs based boxes for sale on Ali, eBay, and Amazon) so maybe this one will show that the designers actually learned from earlier efforts.

--mike
 


Re: Sangean HDR-14 UL HD AM/FM Radio - What do you think?

Michael Schuster
 

On Fri, Jun 4, 2021 at 07:31 AM, radiojayallen wrote:
The main problem I find in my cars with AM IBOC is that when you live on the fringe of an AM HD station area the switching is obvious, and the only way to stop it is to go through menus to disable HD entirely which is not convenient.

Jay
Yep. This has been an issue from the very start and given the bad taste it leaves, it is surprising the chip designers rarely address this in firmware. At home, both of my Sony XDR-F1HD tuners have been modded with a toggle switch that lets you do this on the fly. 


Re: FM Translators - Why?

radiojayallen
 

One other aspect of this I haven't seen discussed (and forgive me if it was and I missed it) is what I would call The Tail Wagging The Dog". I have seen many cases where a struggling AM station was granted an  FM translator, and since the two stations must carry the identical programming, the owners switch the format of the AM station to one they feel will be most successful on FM. I have seen many AM'ers which carried, say, Music Of Your life or oldies which changed to Adult Cpmtemporary or Rock which was a loss for the AM's listeners.

I understand the reasoning for this...I just hate to see it.

jay


Re: Sangean HDR-14 UL HD AM/FM Radio - What do you think?

radiojayallen
 

The main problem I find in my cars with AM IBOC is that when you live on the fringe of an AM HD station area the switching is obvious, and the only way to stop it is to go through menus to disable HD entirely which is not convenient.

Jay


Re: Sangean HDR-14 UL HD AM/FM Radio - What do you think?

Mark Roberts
 

Michael - Experience with car radios is a pretty limited set - a Prius (I was not the primary driver of that car) and an Audi A4 (the car I drive regularly). The Audi came with HD reception disabled; I had to go through the menus in order to turn it on. I might have left it off, but I like AAA formats and, ever since KFOG dumped its format and became KNBR-FM (sports), the only over-the-air AAA I get is KOIT HD-2....which is good for the music but kind of lacks a personality (no live talent). Reception generally is good though there are occasional dropouts, sometimes in unexpected places, such as the north end of the Highway 13 Freeway (the Warren Freeway). It sounds OK but I sometimes can hear the digital artifacts. Only one broadcaster here tries to squeeze in four HD channels, and that's EMF (the K-Love people). No AM HD here. I will be traveling near the Sacramento area in a couple of weeks; it will be interesting to see if KHTK (1140) is still in HD.

The car is my primary location for listening to KOIT HD-2, but I got the HDR-14 units so I could hear them at home and at work, back when work wasn't at home!

On Wed, Jun 2, 2021 at 1:21 PM Michael Schuster <schuster.ma@...> wrote:

[Edited Message Follows]

On Mon, May 24, 2021 at 12:27 AM, Mark Roberts wrote:
The situation in the United States is not one that would indicate that HD is the future of radio. In the San Francisco Bay Area, one of our two National Public Radio stations has turned it off. The commercial FM stations running HD have been abandoning their HD-2 channels. The all-sports stations on FM (we have two of those) have turned it off - the time delay makes it difficult for listeners to bring their radios to the ballpark or stadium to hear the play-by-play of the action that's in front of them. There are still a couple of interesting formats on HD-2 stations, but in other cities, HD-2 channels seem to be used primarily for AM simulcasts. No AM HD here - the nearest is in Sacramento (about 130 km away). The Federal Communications Commission has authorized digital-only AM stations, but that's a relatively new development. The big commercial chains (Audacy, iHeartRadio, Bonneville, Cumulus) are the ones who've kept HD alive. As for receivers, many new cars can receive HD signals. However, that's not widely promoted. I bought a car two years ago; the "infotainment system" can receive HD but it was turned off by default. I had to go through the menus to find the setting to turn it on.
Mark,

I'm on the opposite coast, and the NY Metro market may be atypical; but HD penetration is still reasonably alive. WCBS-AM turned off its HD exciter a few years ago but WINS-AM is still going strong with both an AM (MA1 mode) and FM-HD3 subchannel. Many of the local corporate FM stations transmit in HD and many have multiple active subchannel streams - as many as FOUR in some cases. Elsewhere I reported on WFAS-AM, a audience-less low-power Cumulus station that switched to all-digital on May 22.

Kinda curious about your experience with car radios (forgive the brief off-topic diversion). Over the last few years we have had Ford and Toyota products (odd pairing, yes - it's because they have thoroughly perfected very similar gas/electric hybrid technology); the mid-level and premium factory sound systems all have HD tuners which is simply enabled by default. 


Long Term DX Project - 4/06/2021 - Heritage Forest

Paul Blundell
 

Date: 4/06/2021
Time: 12:15pm
Location: Heritage Forest, Launceston Tasmania.
Radio: AR-1733 / 3” FSL
Notes: An early afternoon session during my daily walk. Signals were a mixed bag with 3LO on 774kHz hitting excellent signal level, but several stations were either unlogged (2CR on 549kHz and 2CA on 1053kHz) or only logged at weak or poor signal levels. The HPON stations only hit weak signal levels.

 

Long Term DX Project Loggings:

FREQ

CALLSIGN

LOGGED

Area Served

Purpose

Power

531

3GG

WEAK

Warragul

Commercial

5k

549

2CR

UNLOGGED

Cumnock

National

50k

594

3WV

GOOD

Horsham

National

50k

621

3RN

GOOD

Melbourne

National

50k

774

3LO

EXCELLENT

Melbourne

National

50k

1053

2CA

UNLOGGED

Canberra

Commercial

5k

1179

3RPH

UNLOGGED

Melbourne

Community

5k

1341

HPON GEELONG

WEAK

Geelong

HPON

5k

1422

HPON MELBOURNE

WEAK

Melbourne

HPON

5k

1503

3KND

POOR

Melbourne

Community

5k

 

 




Re: Tecsun PP-330 has a great feature

Robert Conboy
 

Not likely, as only a narrow bandwidth is making it to the input, and its coupled through the air. A strong local station might overload the front-end of the radio, that just ruins reception while the overload isn’t present.  I’m not seeing the received signal indicator maxing out either.

This setup eliminates the interaction between 2 tuned circuits coupled together and therefore eliminates the need for precision positioning of the radio in relationship to the antenna. It also eliminates any skewing of the directionality that can pick up unwanted noise.


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

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

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Description:
Latest data on MW radio stations in Australia.


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Re: Tecsun PP-330 has a great feature

Paul Blundell
 

That sounds like an interesting feature, any chance of this overloading the PL-330 and causing damage?


On Fri, Jun 4, 2021 at 10:31 AM <robconboy@...> wrote:

...not sure if this has been mentioned before...


The Tecsun PL-330 has an external antenna jack. It also has a feature where if you press and hold the “3” button it switches the mw loopstick antenna out and switches in the whip. Then if you plug an antenna into the aforementioned jack, it switches out the whip and switches in the jack.

 

If you plug in a simple stereo plug, and cut off the opposite plug, you can separate left and right wires as much as you need to make a pickup loop. Connect the right channel center conductor (red wire) to the LEFT channel shield. Cut back the left center conductor and right channel shield to prevent you from shorting it out.

 

Right now I have the pickup loop wrapped around my 19-rod FSL. Wow! Clean signal, super easy to tune, and it is not impacting selectivity of the antenna.

 

To switch back to the loopstick, press and hold “3” again.



--
Paul


Re: Tecsun PP-330 has a great feature

Robert Conboy
 

I mean PL-330, but it probably got your attention!


Tecsun PP-330 has a great feature

Robert Conboy
 

...not sure if this has been mentioned before...


The Tecsun PL-330 has an external antenna jack. It also has a feature where if you press and hold the “3” button it switches the mw loopstick antenna out and switches in the whip. Then if you plug an antenna into the aforementioned jack, it switches out the whip and switches in the jack.

 

If you plug in a simple stereo plug, and cut off the opposite plug, you can separate left and right wires as much as you need to make a pickup loop. Connect the right channel center conductor (red wire) to the LEFT channel shield. Cut back the left center conductor and right channel shield to prevent you from shorting it out.

 

Right now I have the pickup loop wrapped around my 19-rod FSL. Wow! Clean signal, super easy to tune, and it is not impacting selectivity of the antenna.

 

To switch back to the loopstick, press and hold “3” again.

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