Date   

Re: Common Interference Sources

Paul Blundell
 

Thanks Dave, we do have a touch lamp but this is at the other end of the house. I will keep it in mind.

Paul

On Tue, Jun 8, 2021 at 1:16 AM Dave Hascall <dhinfomedia@...> wrote:
Hi Paul.  If turning the main breaker off silences the noise, I then turn it back on and kill each circuit, breaker by breaker until I determine what circuit the culprit is on.  A touch lamp was the biggest offender.

73
Dave in Indy (Noblesville) 



--
Paul


Re: Common Interference Sources

Gavin
 

Chargers getting worse? Yes, the cheap ones.
Allegedly they make them cheaper without RF suppression but even those with it are not good.

The list is long but for example unplug to see if a difference
- touch on/off bedside lamps
- phone chargers
- PC power supplies
- other appliance external power supplies
- appliances generally if they convert down voltage inside
- fluorescent lights and bad starters
- LED lights and light bulbs
- Wall switches for light dimmers
- Stick vac power chargers
- Wall warts of all descriptions especially if not transformer based
- security proximity lights
- security camera system and wifi cameras
- deck lighting
- electric operated shutters and blinds
- cordless tool chargers
- the list goes on.

Then, there's the neighbour's devices especially if you have an outside aerial.


Re: Sangean DT-250 ULR Receiver

Michael Schuster
 

Physically looks very much like the receiver sold in the Americas as the DT-200X.


Re: Common Interference Sources

Paul S. in CT
 

If its not in the house, the neighbor's electric dog fence and intrusion detection (motion detector/burgalar alarm/tresspass detector) top the short list. The latter affects me at home. When the neighbor leaves for the weekends, the AM is unlistenable between 1000-1200kHz. Most of the time though, its a blup-blip-blip thats quieter. Rare, but local to me, is the NatGas pipeline transponder... nasty in the same bandwidth as above.

Paul S. in CT FN31nl


Re: Common Interference Sources

Paul S. in CT
 

In general I unplug ALL chargers when not in use, along with the toaster, microwave, and coffee pot. This will save some $ on the electric bill, too!

Paul S. in CT FN31nl


Re: Common Interference Sources

Dave Hascall
 

Hi Paul.  If turning the main breaker off silences the noise, I then turn it back on and kill each circuit, breaker by breaker until I determine what circuit the culprit is on.  A touch lamp was the biggest offender.

73
Dave in Indy (Noblesville) 


Re: Common Interference Sources

Paul Blundell
 

Thanks Chris.

Getting the power off will require some negotiation with the other household members... I will try over the weekend to get them out of the house.

On Mon, 7 Jun 2021, 18:03 Chris Rogers, <crvee8@...> wrote:
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 to 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.


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

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