Date   

Re: DXing FM Bluetooth Transmitters

Marc Coevoet
 

Op 26/05/2021 om 02:28 schreef Paul Blundell:
Of late I have been looking for some new targets, has anybody tried or thought of hunting down the small FM transmitters that are used to connect a Bluetooth phone to the car radio?
If so, what sort of range would you expect?
I have this item, it connects to your computer and can take over audio via usb, so it is digital audio as input. (xubuntu linux).

Without adding a wire as antenna, you will only reach 10 meters, but ... a simple 75cm wire will make reception possible in (my car) radio for about 500m. Of course, I choose a good empty frequency ...

It can make such a strong tx, that you need to think about neighbours!
Some stations close to the tx freq, will get bad reception ...

Marc

--
The "Penguin" has arrived - and he's not going away - ever.
For former Apple users: Xubuntu.org (menu's up left)
For former Windows users: Lubuntu.org (menu's down left)


Re: Awards Program

Jorge Garzón
 

Hi Paul, 
Gary was trying to activate this some time ago and I offered myself as a volunteer for that. Perhaps he could refresh the steps we made! 

El mié., may. 26, 2021 a 8:27, Paul Blundell
<tanger32au@...> escribió:
I am thinking about trying to launch a new "awards" program. It seems that every other week SOTA, IOTA, SiOTA or another awards program pops up in the amateur radio space. I would love to see us do something to make us stand out and get a focus / our own identity in the broad "hobby radio" space.

I am happy to do the work and run the admin side of this, if we can decide on how we want it to work / look like. It would need to allow anybody to participate and account for the different areas of the world and the challenges of this.

Thoughts?

Paul
https://ultralightradiodxing.blogspot.com/


Awards Program

Paul Blundell
 

I am thinking about trying to launch a new "awards" program. It seems that every other week SOTA, IOTA, SiOTA or another awards program pops up in the amateur radio space. I would love to see us do something to make us stand out and get a focus / our own identity in the broad "hobby radio" space.

I am happy to do the work and run the admin side of this, if we can decide on how we want it to work / look like. It would need to allow anybody to participate and account for the different areas of the world and the challenges of this.

Thoughts?

Paul
https://ultralightradiodxing.blogspot.com/


Re: DXing FM Bluetooth Transmitters

Paul Blundell
 

Thanks for the reply.

My idea was to hunt down the FM side of this, where it transmits the signal from the phone to a free frequency on the FM band.

On Wed, May 26, 2021 at 3:33 PM kevin asato <kc6pob@...> wrote:
Your classic Bluetooth devices (not Bluetooth Low Energy (LE)) are rated at 10meters or less (Class 3). i also have a Bluetooth device that is Class 1 which has a ranged of 100 meters or so (RS-232 serial port extended). Distances on Class 4 and 5 devices are supposed to work at higher speeds but these are primarily data devices versus Class 1 and 2 which are primarily cameras, computers, and audio devices. Bluetooth has the ability to peer to many other devices but smaller devices will peer only to another device as this is a horsepower/resource issue and will also serve as a barrier to intrusion but limiting available connections.

i have not tried to DX/DF Bluetooth devices but have gotten into Bluetooth devices that were not password protected or left to the default passcode. This generally happens in a hotel or airport where there are lots of people using Bluetooth and are rather sloppy at personal protection. Not into snooping so i did not get past the front door to look at peoples content. 

in the same wireless spectrum with Bluetooth is Wifi in the 2.4GHz band allocation. In the early days of WiFi there was a thing called War Driving/War Chalking were people made it a sport to look for open Access Points to gain network access. There devices have a bit more energy being radiated with range up to 1000 feet in clear space. Around my neighborhood in the City, i typically see about 20 or more access points as my neighbors and i have multiple APs to cover the blind spots in our homes (this despite all the advertising claims). i would probably see more if the table of learned devices was not saturated. You can also DF (Direction Find) the location of an Access Point or WiFi device by using Yagi antennas; just not the Cantenna as they are never the right tool for this frequency band.

73,
kevin
kc6pob

On Tue, May 25, 2021 at 5:28 PM Paul Blundell <tanger32au@...> wrote:
Of late I have been looking for some new targets, has anybody tried or thought of hunting down the small FM transmitters that are used to connect a Bluetooth phone to the car radio?

If so, what sort of range would you expect?



--
Paul


Re: DXing FM Bluetooth Transmitters

kevin asato
 

Your classic Bluetooth devices (not Bluetooth Low Energy (LE)) are rated at 10meters or less (Class 3). i also have a Bluetooth device that is Class 1 which has a ranged of 100 meters or so (RS-232 serial port extended). Distances on Class 4 and 5 devices are supposed to work at higher speeds but these are primarily data devices versus Class 1 and 2 which are primarily cameras, computers, and audio devices. Bluetooth has the ability to peer to many other devices but smaller devices will peer only to another device as this is a horsepower/resource issue and will also serve as a barrier to intrusion but limiting available connections.

i have not tried to DX/DF Bluetooth devices but have gotten into Bluetooth devices that were not password protected or left to the default passcode. This generally happens in a hotel or airport where there are lots of people using Bluetooth and are rather sloppy at personal protection. Not into snooping so i did not get past the front door to look at peoples content. 

in the same wireless spectrum with Bluetooth is Wifi in the 2.4GHz band allocation. In the early days of WiFi there was a thing called War Driving/War Chalking were people made it a sport to look for open Access Points to gain network access. There devices have a bit more energy being radiated with range up to 1000 feet in clear space. Around my neighborhood in the City, i typically see about 20 or more access points as my neighbors and i have multiple APs to cover the blind spots in our homes (this despite all the advertising claims). i would probably see more if the table of learned devices was not saturated. You can also DF (Direction Find) the location of an Access Point or WiFi device by using Yagi antennas; just not the Cantenna as they are never the right tool for this frequency band.

73,
kevin
kc6pob

On Tue, May 25, 2021 at 5:28 PM Paul Blundell <tanger32au@...> wrote:
Of late I have been looking for some new targets, has anybody tried or thought of hunting down the small FM transmitters that are used to connect a Bluetooth phone to the car radio?

If so, what sort of range would you expect?


Re: This DX'er Got Fan Mail!

Jorge Garzón
 

Congrats Paul,
For me, that's better than a QSL card. Gardeners are always nice people!
73!
Jorge


Re: This DX'er Got Fan Mail!

Paul Blundell
 

That's really nice Paul, I am glad she sent this to you.

Paul

On Wed, May 26, 2021 at 2:21 PM Paul B. Walker, Jr. <walkerbroadcasting@...> wrote:
Some of you may remember I picked up 7ZR 936khz ABC Hobart from 8000 miles away here in Alaska, ending up live on the morning show a few days later and about a week later, on an Australian National morning tv show, News Breakfast. Well, a Hobart area grandmother looked me up online, found my address and sent me a very nice, hand written card!

Here's a picture of the card:

P.s. Because of my location, job and hobby... im not too hard to find.




--
Paul


This DX'er Got Fan Mail!

Paul B. Walker, Jr.
 

Some of you may remember I picked up 7ZR 936khz ABC Hobart from 8000 miles away here in Alaska, ending up live on the morning show a few days later and about a week later, on an Australian National morning tv show, News Breakfast. Well, a Hobart area grandmother looked me up online, found my address and sent me a very nice, hand written card!

Here's a picture of the card:

P.s. Because of my location, job and hobby... im not too hard to find.



Re: Two good catches on a barefoot ETÓN ELITE TRAVELER 25-05-2021

Peter 1956
 

No, you're not wrong they are, don't buy it.
The Eton Elite Executive should sell for that sort of price, the Traveler should be less than half that price.
The older Eton Traveler III has the same capability as the Eton Elite Traveler, and probably is a better radio.
You might find the Eton Traveler III for a reasonable price.
Peter


Re: Good source for 18650 batteries?

Mark Roberts
 

Totally agreed about the drain from the digital clock. The XHDATAs that I have require recharging every two to three weeks even if they are not otherwise used. That's why I think there's a problem. The other radios with a clock display can last months. When I can, I use metal-hydride batteries.

One other downside of lithium-ion batteries: At least in the United States, you're not supposed to put anything with such batteries in checked luggage on an airplane.


On Tue, May 25, 2021 at 5:10 AM radiojayallen <radiojayallen@...> wrote:
For radios I use with any regularity I don' remove the batteries...too inconvenient. I only had the two radios which drained batteries fast while off (they would be down in a few days) were both defective and replacements eliminated the problem, so this shouldn't normally be an issue. With one such radio the audio amp was staying on all the time...the cause of the second one (a PL-990) is yet to be determined but I am waiting for an answer on that from the seller. The replacement PL-990 doesn't have this problem).

To be clear, digital radios do use a small amount of power to keep the clock running but this kind of drain should take a long time to show up so if you use the radio even once a month you shouldn't notice it.

Jay


7SD

Paul Blundell
 

Of late I have noticed that this station which is 50km away and runs 5kw is being over taken by a 10kw station from 2200km away.

I suspect that the local station has dropped power or has other issues.


DXing FM Bluetooth Transmitters

Paul Blundell
 

Of late I have been looking for some new targets, has anybody tried or thought of hunting down the small FM transmitters that are used to connect a Bluetooth phone to the car radio?

If so, what sort of range would you expect?


Re: Two good catches on a barefoot ETÓN ELITE TRAVELER 25-05-2021

Paul Blundell
 

Some times the pricing does seem way off.


On Wed, 26 May 2021, 03:33 Jorge Garzón via groups.io, <iberiaDX=yahoo.com@groups.io> wrote:
Everything has become more complicated now, what I do not understand Emoji

Amazon UK has a price of 107 pounds and do not serve to the Continent!!!!
Amazon Spain offers the receiver for 135 €.
Amazon USA 100$ including shipping to Spain.
Amazon Canada 70$CAN and they do not ship to Spain. (Pity, best price!)

So, bought it in the US is the best option. Final price: 82€ against 135€ from Spain. Unbelievable!!!

I will orden then to the US!

73!

Jorge Garzón Gutiérrez "IberiaDX" 
(EB7EFA · EA1036 SWL · BDXC Member 1409) 
QTH: IN83ag / 43º15' N · 03º56' W
Urb. San Roque 95, casa 5 (Villasevil)

39698 Santiurde de Toranzo (ESPAÑA - SPAIN)
..................................................................................
Blog: IberiaDX  · Twitter: @IberiaDX


En martes, 25 de mayo de 2021 18:01:03 CEST, Peter 1956 <pe1etr@...> escribió:


[Edited Message Follows]

Thanks Jorge.
I bought mine from Amazon UK in 2019 when it was on special offer for GBP 37.

Maybe Amazon ES might stock it?

Peter


Re: UL FM reception

Paul Blundell
 

I ran a three way test on the weekend, this might help a bit:


On Wed, 26 May 2021, 07:59 Michael.2E0IHW via groups.io, <blumu=btinternet.com@groups.io> wrote:
Which is the FM dx ultralight with the best sensitivity and selectivity?

Michael UK



Re: Good source for 18650 batteries?

Paul Blundell
 

Thanks Jay, I have found that my TEAC PR130 seems to draw down the batteries a bit, even when turned off.

Paul

On Tue, May 25, 2021 at 10:10 PM radiojayallen <radiojayallen@...> wrote:
For radios I use with any regularity I don' remove the batteries...too inconvenient. I only had the two radios which drained batteries fast while off (they would be down in a few days) were both defective and replacements eliminated the problem, so this shouldn't normally be an issue. With one such radio the audio amp was staying on all the time...the cause of the second one (a PL-990) is yet to be determined but I am waiting for an answer on that from the seller. The replacement PL-990 doesn't have this problem).

To be clear, digital radios do use a small amount of power to keep the clock running but this kind of drain should take a long time to show up so if you use the radio even once a month you shouldn't notice it.

Jay



--
Paul


Radio's For Sale

Alfred Rugel <rugelj2002@...>
 

Due to health considerations I am selling the following:
1.  Tecsun PL-380 Silver 4 Mo old NEVER USED Complete in factory box $45.00.
2.  XH Data D-808 2 Mo old NEVER USED Complete in factory box $90.00
3.  Sony M37V Immaculate Used very little w/New Hard Case.  $45.00 
FREE SHIPPING in 48 States.  Paypal w/fee.


Re: UL FM reception

Michael.2E0IHW
 

Which is the FM dx ultralight with the best sensitivity and selectivity?

Michael UK



Re: Two good catches on a barefoot ETÓN ELITE TRAVELER 25-05-2021

Jorge Garzón
 

Am I wrong?




Jorge Garzón Gutiérrez "IberiaDX" 
(EB7EFA · EA1036 SWL · BDXC Member 1409) 
QTH: IN83ag / 43º15' N · 03º56' W
Urb. San Roque 95, casa 5 (Villasevil)
39698 Santiurde de Toranzo (ESPAÑA - SPAIN)
..................................................................................
Blog: IberiaDX  · Twitter: @IberiaDX


En martes, 25 de mayo de 2021 19:51:08 CEST, Peter 1956 <pe1etr@...> escribió:


Hello Jorge,
Are you sure you have the correct radio? Those prices are way too high. The Eton Elite Executive is NOT the same radio as the Eton Elite Traveller!

Peter


Re: Improving Pocket UL FM reception

Jorge Garzón
 

I did it Jay, but I didn't find a noticeable improvement. I must say that I have to test better both filters on FM, as there are better stations to be chosen and test.

Narrow/wide positions are useful on MW band as I check this feature regularly with NA TA channels. 

El mar., may. 25, 2021 a 14:02, radiojayallen
<radiojayallen@...> escribió:
Interesting project! Did you try the DT-880's Narrow FM bandwidth setting for improved selectivity?

Jay


Re: Two good catches on a barefoot ETÓN ELITE TRAVELER 25-05-2021

Peter 1956
 

Hello Jorge,
Are you sure you have the correct radio? Those prices are way too high. The Eton Elite Executive is NOT the same radio as the Eton Elite Traveller!

Peter

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