Date   

Re: Anybody get a new radio recently?

FenDrifter
 

Quite honestly the only thing the 368 lacks (in my opinion) is a shortwave antenna input, but I pick up a fair amount when conditions allow anyway. 

Drifter


Re: ULDXIndex and MWDXerDB V22.03

Paul Blundell
 

I have now made a change to how this is handled. Instead of adding them to a single file, I have created a file for each frequency and station, this will be updated each time I log the station and add the ULDXIndex.

Paul



Re: Anybody get a new radio recently?

Paul Blundell
 

The 368 sounds better and better all the time :)

Paul

On Wed, Mar 9, 2022 at 3:03 PM Ron Layton via groups.io <micron327=zoho.com@groups.io> wrote:
The 368 uses a standard cell phone charger. I have listened to mine while charging but depending on the charger you can pick up some unwanted noise on MW & SW. I bought the charger with 2 extra batteries kit from County Comm and that way I always have 2 fully charged batteries for a quick change out.
73's
Ron



--
Paul


Re: ULDXIndex and MWDXerDB V22.03

Paul Blundell
 

Yeah, that is one way of doing it.
The original way didn't include the signal level, it was something I have added.

On Wed, Mar 9, 2022 at 2:34 PM James Rohrer <Jim.rohrer1955@...> wrote:
See if I did this correctly.   WWL New Orleans 870 AM came in tonight.  1635 km / 50000=.0327.  Signal strength five so multiply and get .1635 as my index value.

Yesterday evening KCJJ in Iowa City 1630 AM came in 5 by 5.  Distance is 330 km.  Night watts are only 1000.  Index value is 1.65.  This is ten times better than the index i got from hearing the Clear Channel station down at the end of the Big Muddy.

This suggests to me that instead of searching for strong signals I should make a list of 1000 watt broadcasters in my area and go hunting for them on my radio.







--
Paul


MW Frequency Challenge - Week 15 Results and Week 16 Announcement (693-783 kHz)

DX Central - Loyd Van Horn (W4LVH)
 

All,

Week 15 is now in the books and congrats to our THREE winners for most receptions this week, a tie between Niel Wolfish, John Johnson and Rob Keeney.  Full results can be found at the link below along with the Google Form for our week 16 challenge:  693 - 783 kHz!

https://www.dxcentralonline.com/post/mw-frequency-challenge-week-15-results-and-week-16-announcement-693-783-khz 

Good luck to all!
--
73 and best of DX!

Loyd Van Horn
W4LVH - Mandeville, Louisiana
Member:  IRCA/NRC Courtesy Program Committee (CPC)
Founder: DX Central - Because we're all about radio
Twitter:  @DXCentral


Re: Anybody get a new radio recently?

Ron Layton <micron327@...>
 

The 368 uses a standard cell phone charger. I have listened to mine while charging but depending on the charger you can pick up some unwanted noise on MW & SW. I bought the charger with 2 extra batteries kit from County Comm and that way I always have 2 fully charged batteries for a quick change out.
73's
Ron


Re: ULDXIndex and MWDXerDB V22.03

James Rohrer
 

See if I did this correctly. WWL New Orleans 870 AM came in tonight. 1635 km / 50000=.0327. Signal strength five so multiply and get .1635 as my index value.

Yesterday evening KCJJ in Iowa City 1630 AM came in 5 by 5. Distance is 330 km. Night watts are only 1000. Index value is 1.65. This is ten times better than the index i got from hearing the Clear Channel station down at the end of the Big Muddy.

This suggests to me that instead of searching for strong signals I should make a list of 1000 watt broadcasters in my area and go hunting for them on my radio.


Re: Selectivity, sensitivity, quality

James Rohrer
 

The Wikipedia article on Signal Strength and Readability is interesting. The phrase five by five is from ww two. 

On Tue, Mar 8, 2022 at 6:47 PM Issac Quincey via groups.io <IssacQuincey=protonmail.com@groups.io> wrote:
This explains it very well. I have shown it to a ham friend of mine and he thinks it is spot on.

Sent with ProtonMail Secure Email.

------- Original Message -------

On Monday, March 7th, 2022 at 10:46 PM, Robert Conboy <robconboy@...> wrote:

> Selectivity is a combination of the channel selection filter’s bandwidth and how steeply the filter attenuates frequencies outside the filter’s bandwidth.
>
> Narrow filters have greater selectivity, but they’re also narrower than the bandwidth broadcast by the station. When this is the case, the audio’s treble is lost. If the radio is capable of it, then detuning the radio slightly can restore some of the treble. Also, if there is a strong station on an adjacent frequency, choosing a narrow filter setting and detuning a little, in the direction away from the strong adjacent, helps reject the adjacent channel interference.
>
> The reason why it is often impossible to completely reject adjacent channel interference is because the sidebands broadcast by the adjacent station overlap the sidebands broadcast by the station you’re tuned to. There will be splashover no matter how good your radio is
>
> But
>
> It is often possible to completely or almost completely eliminate this kind of interference by using a directional antenna. Loop antennas have two sharp nulls 180 degrees apart. If you can point one of the nulls toward the offending station, its interference can be reduced or eliminated.
>
> Sensitivity is about how weak a signal the radio can receive. Theoretically, the only thing necessary is to have the received signal be stronger than the noise generated internally in the radio. Usually atmospheric noise coming in from the antenna is much higher than this, so increasing the gain does little to help beyond a certain point. Therefore sensitivity is more about signal to noise ratio than it is about how much the radio amplifies. The way to get better sensitivity is by placing the antenna away from sources of noise, and by using an antenna with directional characteristics. If atmospheric noise is coming from all directions, an antenna that is sensitive only to signals coming from one direction will reject much of it. In fact, such an antenna usually has very low signal amplitude, but the noise is even lower, making sensitivity better.
>
>






Re: Selectivity, sensitivity, quality

Issac Quincey
 

This explains it very well. I have shown it to a ham friend of mine and he thinks it is spot on.

Sent with ProtonMail Secure Email.

------- Original Message -------

On Monday, March 7th, 2022 at 10:46 PM, Robert Conboy <robconboy@...> wrote:

Selectivity is a combination of the channel selection filter’s bandwidth and how steeply the filter attenuates frequencies outside the filter’s bandwidth.

Narrow filters have greater selectivity, but they’re also narrower than the bandwidth broadcast by the station. When this is the case, the audio’s treble is lost. If the radio is capable of it, then detuning the radio slightly can restore some of the treble. Also, if there is a strong station on an adjacent frequency, choosing a narrow filter setting and detuning a little, in the direction away from the strong adjacent, helps reject the adjacent channel interference.

The reason why it is often impossible to completely reject adjacent channel interference is because the sidebands broadcast by the adjacent station overlap the sidebands broadcast by the station you’re tuned to. There will be splashover no matter how good your radio is

But

It is often possible to completely or almost completely eliminate this kind of interference by using a directional antenna. Loop antennas have two sharp nulls 180 degrees apart. If you can point one of the nulls toward the offending station, its interference can be reduced or eliminated.

Sensitivity is about how weak a signal the radio can receive. Theoretically, the only thing necessary is to have the received signal be stronger than the noise generated internally in the radio. Usually atmospheric noise coming in from the antenna is much higher than this, so increasing the gain does little to help beyond a certain point. Therefore sensitivity is more about signal to noise ratio than it is about how much the radio amplifies. The way to get better sensitivity is by placing the antenna away from sources of noise, and by using an antenna with directional characteristics. If atmospheric noise is coming from all directions, an antenna that is sensitive only to signals coming from one direction will reject much of it. In fact, such an antenna usually has very low signal amplitude, but the noise is even lower, making sensitivity better.


Re: All Continental US States - 2022

Issac Quincey
 

We could try the same in each country? Each person tries to log as many areas as they can.

Sent with ProtonMail Secure Email.

------- Original Message -------
On Wednesday, March 9th, 2022 at 10:08 AM, Michael.2E0IHW via groups.io <blumu@...> wrote:

I am in Devon and bewail the loss of MW broadcasts. Only Spain is holding the fort now,
apart from a few UK and European stations. We should long since have realised
how valuable MW is for public information in a crisis. I can no longer receive local
news since Auntie shut down the only transmitter which can reach parts that others
cannot reach - coasts and valleys. Internationally, SW can be even more useful,
but few have access - or even know it exists!

The BBC is struggling to revive facilities to broadcast into eastern Europe now.
Our recent storms should have enlightened us that the mobile phone network
we take for granted is very vulnerable.
We should learn from history, but...

In the US broadcast band is still going strong. May it remain so!

Michael

On 08/03/2022 22:14, FenDrifter via groups.io wrote:

Hi Steve
Yes, you’re right about my location, east of Peterborough. I’m new to this game and until now have mainly been listening to the hams on side band. I’ve become aware that the majority of members of this group are MW listeners, and again with the majority Stateside I’ve felt a little isolated, but the link you supplied will certainly encourage me to spend a bit more time on the medium wave band. I hasten to add here that this group has been nothing other than welcoming and helpful. Regarding propagation conditions, I’ve not been at it long enough to know if I’ve ever experienced good conditions 🤔. I am of course aware that some days are a lot better than others!

Cheers




Re: ULDXIndex and MWDXerDB V22.03

Issac Quincey
 

Is that what you have coded this with? Would you think about my offer to review the code for security holes and bugs?

Sent with ProtonMail Secure Email.

------- Original Message -------
On Wednesday, March 9th, 2022 at 8:17 AM, Paul Blundell <tanger32au@...> wrote:

Yeah, JustBasic handles that :)

On Wed, 9 Mar 2022, 12:52 am FenDrifter via groups.io, <essexmarshman=icloud.com@groups.io> wrote:
BODMAS Paul?



Re: All Continental US States - 2022

Steve Whitt
 

Hi

I’m not sure if you are still looking for your first trans-atlantic signals. From the Uk I’d suggest looking at 590kHz around 10pm onwards to try for VOCM from Newfoundland. At UK sunrise look for WBBR 1130 for New York.

 

Good luck

Steve

 

From: main@UltralightDX.groups.io [mailto:main@UltralightDX.groups.io] On Behalf Of FenDrifter via groups.io
Sent: 08 March 2022 22:15
To: main@UltralightDX.groups.io
Subject: Re: [UltralightDX] All Continental US States - 2022

 

Hi Steve
Yes, you’re right about my location, east of Peterborough. I’m new to this game and until now have mainly been listening to the hams on side band. I’ve become aware that the majority of members of this group are MW listeners, and again with the majority Stateside I’ve felt a little isolated, but the link you supplied will certainly encourage me to spend a bit more time on the medium wave band. I hasten to add here that this group has been nothing other than welcoming and helpful. Regarding propagation conditions, I’ve not been at it long enough to know if I’ve ever experienced good conditions 🤔. I am of course aware that some days are a lot better than others! 

Cheers
Drifter


Re: 864 kHz

Mark
 

Thanks Russ, 

Useful link. 


Re: 864 kHz

Russ Edmunds
 

That is indeed Eqypt.

You might want to check out mwlist:   https://www.mwlist.org/mwlist_quick_and_easy.php

Russ Edmunds

WB2BJH

Blue Bell, PA

Grid FN20id


From: main@UltralightDX.groups.io <main@UltralightDX.groups.io> on behalf of Mark via groups.io <metagenetics@...>
Sent: Tuesday, March 8, 2022 6:13 PM
To: main@UltralightDX.groups.io <main@UltralightDX.groups.io>
Subject: [UltralightDX] 864 kHz
 
Hi all, 

Can anyone confirm if 'Al Qaran' on 864 kHz does in fact broadcast out of Egypt? I pick this station up night after night, from the east coast of Scotland very clearly with my small loop antenna. A quick check on Google maps reveals that distance to be over 2600 miles!

Cheers, Mark. 


864 kHz

Mark
 

Hi all, 

Can anyone confirm if 'Al Qaran' on 864 kHz does in fact broadcast out of Egypt? I pick this station up night after night, from the east coast of Scotland very clearly with my small loop antenna. A quick check on Google maps reveals that distance to be over 2600 miles!

Cheers, Mark. 


Re: All Continental US States - 2022

Michael.2E0IHW
 

I am in Devon and bewail the loss of MW broadcasts. Only Spain is holding the fort now,
apart from a few UK and European stations. We should long since have realised
how valuable MW is for public information  in a crisis. I can no longer receive local
news since Auntie shut down the only transmitter which can reach parts that others
cannot reach - coasts and valleys.  Internationally, SW can be even more  useful,
but few have access - or even know it exists!

The BBC is struggling to revive facilities to broadcast into eastern Europe now.
Our recent storms should have enlightened us that the mobile phone network
we take for granted is very vulnerable. 
We should learn from history, but...

In the US broadcast band is still going strong. May it remain so!

Michael

On 08/03/2022 22:14, FenDrifter via groups.io wrote:

Hi Steve
Yes, you’re right about my location, east of Peterborough. I’m new to this game and until now have mainly been listening to the hams on side band. I’ve become aware that the majority of members of this group are MW listeners, and again with the majority Stateside I’ve felt a little isolated, but the link you supplied will certainly encourage me to spend a bit more time on the medium wave band. I hasten to add here that this group has been nothing other than welcoming and helpful. Regarding propagation conditions, I’ve not been at it long enough to know if I’ve ever experienced good conditions 🤔. I am of course aware that some days are a lot better than others! 

Cheers



Re: All Continental US States - 2022

FenDrifter
 

Hi Steve
Yes, you’re right about my location, east of Peterborough. I’m new to this game and until now have mainly been listening to the hams on side band. I’ve become aware that the majority of members of this group are MW listeners, and again with the majority Stateside I’ve felt a little isolated, but the link you supplied will certainly encourage me to spend a bit more time on the medium wave band. I hasten to add here that this group has been nothing other than welcoming and helpful. Regarding propagation conditions, I’ve not been at it long enough to know if I’ve ever experienced good conditions 🤔. I am of course aware that some days are a lot better than others! 

Cheers
Drifter


Re: All Continental US States - 2022

Steve Whitt
 

Hi Fen Drifter

 

Glad you found it useful. It does need a bit of updating which I hope will happen soon.

 

Yes I’m in the UK. If your handle indicates where you located I’m only about 100 miles north of you (near York).

 

This year listeners in the UK have had real difficulty hearing anything from the western half of the USA. Sadly, propagation conditions have largely not been favourable.

 

Regards

Steve

 

 

From: main@UltralightDX.groups.io [mailto:main@UltralightDX.groups.io] On Behalf Of FenDrifter via groups.io
Sent: 08 March 2022 13:48
To: main@UltralightDX.groups.io
Subject: Re: [UltralightDX] All Continental US States - 2022

 

Hi Steve
Wow, I was totally unaware that such a list existed! Now that I have something to search for I may change my listening habits a bit 😊. Very many thanks for that
Drifter
p.s. Are you in the UK?


Re: ULDXIndex and MWDXerDB V22.03

Paul Blundell
 

Yeah, JustBasic handles that :)


On Wed, 9 Mar 2022, 12:52 am FenDrifter via groups.io, <essexmarshman=icloud.com@groups.io> wrote:
BODMAS Paul?


Re: ULDXIndex and MWDXerDB V22.03

Paul Blundell
 

Yes, that is the formula I use. 

I did also look at using two numbers but this got a bit confusing so I just give each signal a single index score.

On Wed, 9 Mar 2022, 12:46 am James Rohrer, <Jim.rohrer1955@...> wrote:
Paul,

Do you compute like this? Dividing before multiplying.

ULDXIndexValue = (DistanceKM / PowerW) * SignalLevel

Regarding signal level, I guess '5by5' could be guideline.  If the signal is both strong and clear, then give it a 5. 

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