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Re: Airband Radio on Ultralight Radios

Paul Blundell
 

Thanks for the reply.

A SDR is outside the scope of this group and not what I am trying to do, which is push these radios as much as I can on the Airband.

On Thu, Feb 14, 2019 at 2:15 PM Max Italy <max2013@...> wrote:

I think that those radios are usable if you want to monitor a specific frequency but not to scan the band. They have a search function  but do not keep scanning the band to find new signals.

For this purphose i suggest to use a SDR dongle with proper software. See a sample video here https://youtu.be/5Yr35n7foks
The software is called Theremino SDR but i think that there is also some plugin for SDRsharp do this.



--
Paul


--
Paul - Moderator
UltralightDX


Re: Airband Radio on Ultralight Radios

Max Italy
 

I think that those radios are usable if you want to monitor a specific frequency but not to scan the band. They have a search function  but do not keep scanning the band to find new signals.

For this purphose i suggest to use a SDR dongle with proper software. See a sample video here https://youtu.be/5Yr35n7foks
The software is called Theremino SDR but i think that there is also some plugin for SDRsharp do this.


Re: Airband Radio on Ultralight Radios

Paul Blundell
 

Thanks for the information Andy.

I want to see how far I can "push" Airband reception on these radios and find the best possible models which cover this band.


On Thu, Feb 14, 2019 at 8:58 AM Andy ZL3AG via Groups.Io <zl3ag=radioengineering.com@groups.io> wrote:

Be aware that airband reception on the AR-1780 is provided by a separate chipset tacked on to the input of the AM/FM chipset.

I haven't tested the effect on the AM BCB side, but the FM sensitivity of the AR-1780 is well down on other radios with the same chipset, as the chipset expects to be connected directly to a whip antenna, not via added circuitry.

If you want airband reception, you're probably better of researching specialised airband portables and sniping a 2nd hand one on your favourite auction site.

On 14/02/19 10:40 AM, Paul Blundell wrote:
> Thanks for the information Dan, this radio is on my list to purchase when my funds allow :)
>
> Does it "scan" the airband at all? That is one thing I do miss. I have a 30 year old scanner at home that does a good job but would love something more portable. I have owned most scanners that have come out over the years at one time or another so know them well.
>
> On Wed, Feb 13, 2019 at 9:45 PM Dan Merta <dnmerta0@... <mailto:dnmerta0@...>> wrote:
>
>     My Digitech AR-1780 has airband and it seems to work quite well. I'm not far from a training airport in Melb Sth East called Moorabbin airport so it picks up those freqs well. The ATS is 120.9000MHz runway left 118.1000MHz, runway right 123.0000MHz & ground is 119.9000MHz
>     I can also pick up Melbourne International airport. (Tullamarine) Esp Melbourne radar on 132.0000MHz
>     For airband listening I use a Uniden ubcd396xt scanner with a VHF 2 meter ham band antenna which enables me to hear all the Melbourne air traffic.
>     https://uniden.com.au/product/ubcd396xt/
>
>
>
> --
> Paul
>
>
> --
> Paul - Moderator
> UltralightDX
>





--
Paul


--
Paul - Moderator
UltralightDX


Re: Airband Radio on Ultralight Radios

Andy ZL3AG
 

Be aware that airband reception on the AR-1780 is provided by a separate chipset tacked on to the input of the AM/FM chipset.

I haven't tested the effect on the AM BCB side, but the FM sensitivity of the AR-1780 is well down on other radios with the same chipset, as the chipset expects to be connected directly to a whip antenna, not via added circuitry.

If you want airband reception, you're probably better of researching specialised airband portables and sniping a 2nd hand one on your favourite auction site.

On 14/02/19 10:40 AM, Paul Blundell wrote:
Thanks for the information Dan, this radio is on my list to purchase when my funds allow :)
Does it "scan" the airband at all? That is one thing I do miss. I have a 30 year old scanner at home that does a good job but would love something more portable. I have owned most scanners that have come out over the years at one time or another so know them well.
On Wed, Feb 13, 2019 at 9:45 PM Dan Merta <dnmerta0@... <mailto:dnmerta0@...>> wrote:
My Digitech AR-1780 has airband and it seems to work quite well. I'm not far from a training airport in Melb Sth East called Moorabbin airport so it picks up those freqs well. The ATS is 120.9000MHz runway left 118.1000MHz, runway right 123.0000MHz & ground is 119.9000MHz
I can also pick up Melbourne International airport. (Tullamarine) Esp Melbourne radar on 132.0000MHz
For airband listening I use a Uniden ubcd396xt scanner with a VHF 2 meter ham band antenna which enables me to hear all the Melbourne air traffic.
https://uniden.com.au/product/ubcd396xt/
--
Paul
--
Paul - Moderator
UltralightDX


Re: Airband Radio on Ultralight Radios

Paul Blundell
 

Thanks for the information Dan, this radio is on my list to purchase when my funds allow :)

Does it "scan" the airband at all? That is one thing I do miss. I have a 30 year old scanner at home that does a good job but would love something more portable. I have owned most scanners that have come out over the years at one time or another so know them well.

On Wed, Feb 13, 2019 at 9:45 PM Dan Merta <dnmerta0@...> wrote:
My Digitech AR-1780 has airband and it seems to work quite well. I'm not far from a training airport in Melb Sth East called Moorabbin airport so it picks up those freqs well. The ATS is 120.9000MHz runway left 118.1000MHz, runway right 123.0000MHz & ground is 119.9000MHz 
I can also pick up Melbourne International airport. (Tullamarine) Esp Melbourne radar on 132.0000MHz 
For airband listening I use a Uniden ubcd396xt scanner with a VHF 2 meter ham band antenna which enables me to hear all the Melbourne air traffic. 
https://uniden.com.au/product/ubcd396xt/



--
Paul


--
Paul - Moderator
UltralightDX


Re: Reliable but reasonably priced sources of ferrite for FSLs?-FARMERIK

Rik
 

It sounds like several responses are from people who understand far more about Q than I do as it relates to MW loops.

I would think I should  aim for the highest Q possible, but it sounds like if too high speech is muffled which would hamper DXing  IDs. However, adding  some variable R could reduce Q. Is that correct? [non-inductive R I assume]

In one of the files I thought it said if either the coil or cap is lower in Q than the other, the tank circuit goes down perhaps to the lower value. So a high Q cap is also important in a resonated circuit?

Higher count Litz increases Q, if I understand correctly. If there is a limit for audio quality, it would be a waste to buy higher count Litz beyond that point, where ever it is.

Also in files here, I think I read increasing both Q or the number of turns of wire increase signal strength, but they are achieved in opposite ways, so you have to balance those factors for best all around performance. Is that correct?

Hoping for expert replies so I can better understand how to build a better portable  ferrite loop. - FARMERIK


Re: "Novelty Radio"

Rik
 

The first radio I noticed being offered in a clear case was the huge FreePlay clock spring wind up. Huge but a prison inmate would never have to buy batteries. The black case version in my collection simply says 'self powered energy' under the FreePlay name and Logo. It was designed for parts of the world with out reliable electricity and where buying batteries could be a problem. - FARMERIK


Re: Gary's Ultralight DX shootout

Rik
 

Thanks Jay!

It looks like your most recent ULR review would be here-

https://radiojayallen.com/sangean-dt-800-am-fm-weather-pocket-radio/

And from your home page the index is on the right-

https://radiojayallen.com/

With just a quick look, I see the CC Pocket and Skywave, C.Com. GP-5/SSB and PL-365, the SONY P-26 and P-36 and I expect I missed a few others, especially in the shirt pocket radio reviews.

What a great resource Jay offers to all! - FARMERIK


Re: "Novelty Radio"

radiojayallen
 

One thing to be aware of though is that often the clear prison versions lack certain in/out connections or features which are present in teh standard versions. Just FYI.


Re: Gary's Ultralight DX shootout

radiojayallen
 

Occasionally I will try one of those unknown-name cheapies and so far I've never found a good one. Most are so egregiously bad on AM that they have spurious noises on my usual suburban AM signals which come in perfectly on any normally performing radio.


Re: Airband Radio on Ultralight Radios

Dan Merta
 

My Digitech AR-1780 has airband and it seems to work quite well. I'm not far from a training airport in Melb Sth East called Moorabbin airport so it picks up those freqs well. The ATS is 120.9000MHz runway left 118.1000MHz, runway right 123.0000MHz & ground is 119.9000MHz 
I can also pick up Melbourne International airport. (Tullamarine) Esp Melbourne radar on 132.0000MHz 
For airband listening I use a Uniden ubcd396xt scanner with a VHF 2 meter ham band antenna which enables me to hear all the Melbourne air traffic. 
https://uniden.com.au/product/ubcd396xt/


Stealth Radio Bag MK8

Paul Blundell
 

Over the years while involved in the radio scanning / amateur radio / ultralight DXing hobbies I have used a number of different bags and cases for carrying my assorted radios and associated bits and pieces. Some of these bags and cases have worked very well, others have not for various reasons. These can be found on my various blogs.

I have again returned to my love of portable operation, this has meant finding a suitable carry case or bag for my radios to undertaken these activities in parks and other locations.

Based on my experience in the past, I ruled out using a “hard” case due to the unwanted attention they can bring plus size and cost. Soft camera bags like I have used in the past do not offer a suitable level of protection and can also make you standout. With this in mind I have recently been on the lookout for ideas to make a suitable carrying system that is “low profile”.

Recently I was at our local Kmart store and found a large padded lunch bag, this was a good size and had enough space for multiple radios and accessories. On the shelf nearby was a number of cheap plastic storage containers, I tried a few different ones until I found one that was a good fit for this padded lunch bag. I also purchased some heavy-duty silver tape and two smaller plastic storage containers. Total cost was $19.

Over the past few nights I have been working on this when and as time has allowed. The first step was to setup the plastic storage container for my radios, this has included sorting all my radios and related items. I installed some foam in the bottom of the case before installing this in to the soft lunch bag. I then attached the lid of the plastic storage container with some heavy-duty tape. This is easy enough to open but also keeps my radios safe and secure.

Over all for less than $20 and a couple of hours of time I have a very low profile bag which provides a good level of protection and blends in, looking like nothing more than a padded lunch bag.

Photos: https://theultralightradiodxer.blogspot.com/2019/02/stealth-radio-bag-mk8.html

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Paul - Moderator
UltralightDX


Re: Digitech AR-1733 Review

Max Italy
 

Excellent Paul, just a note for everybody, press return at the end of a link before posting, you will turn it into a clickable link

https://theultralightradiodxer.blogspot.com/2018/09/review-digitech-ar-1733-dsp-mwfmlwswair.html



On Wed, Feb 13, 2019 at 04:05 AM, Paul Blundell wrote:

https://theultralightradiodxer.blogspot.com/2018/09/review-digitech-ar-1733-dsp-mwfmlwswair.html


Re: Sony SRF-59

Phillip Fimiani
 

Hmmmm .lots to think about... I like it...
 
 
Best Regards
Phil
KD2HTN / WA2069SWL
Long: 34.210293 Lat:-78.057048
FM04xf 30dl
______________________________



From: gary_thorburn <gwt@...>
To: main@UltralightDX.groups.io
Sent: Tuesday, February 12, 2019 4:25 PM
Subject: Re: [UltralightDX] Sony SRF-59

I have a tuning and antenna mod for a SRF-59 as well, I may have posted this long ago.  Not nearly as elegant or well crafted as the gems made by the late John Bryant, but its lightweight, built from 'found' materials, and can be easily rotated on a table.   I also find the mostly analog circuitry of the SRF-59 produces more pleasant, less tiring audio than most DSP receivers.   You'll find four photos at daslied.com/badx/halfshell-srf-59 

1 -- The stock SRF-59  (with my Atwater-Kent model 76 in the background)
2 -- Detail of a simple air-loop, wound spider-style on an 8.5x11 plastic notebook cover from scrap wire. A salvaged tuning cap and switch for tuning range.
3 -- The whole peanut-jar system
4 -- The 'half-shell' mod; the SRF-59 is left open, with a tuning knob made of a jar cover, which works very smoothly.

Gary Thorburn
Maynard, MA



--
73
Phil
KD2HTN / WA2069SWL
Long: 34.210293 Lat:-78.057048
FM04xf 30dl


Digitech AR-1733 Review

Paul Blundell
 

I am in the process of updating this review, what areas would you most like me to focus on?

https://theultralightradiodxer.blogspot.com/2018/09/review-digitech-ar-1733-dsp-mwfmlwswair.html
--
Paul - Moderator
UltralightDX


Airband Radio on Ultralight Radios

Paul Blundell
 

Well it is amazing what a difference 24 hours can make, I am now the proud owner of a Digitech AR1733 (https://www.jaycar.com.au/pll-world-band-radio/p/AR1733).

One thing I love about this radio is that it covers the VHF Airband. I am now going to focus on this area of the hobby, due to this I have published some information on my blog.

https://theultralightradiodxer.blogspot.com/2019/02/tasmania-airband-frequencies.html

https://theultralightradiodxer.blogspot.com/2019/02/airband-radio-terms.html

Does anybody else use their Ultralight radios for this and have any good information they can share?

Paul




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Paul - Moderator
UltralightDX


Re: Gary's Ultralight DX shootout

efd303@...
 

Todderbert on You Tube has an interesting channel which deals with a lot of these cheap off brand UL radios. After watching one of his programs last spring I ordered a cheapie from China that he recommended as being an excellent AM DX radio, $4.70 delivered, and I was not disappointed. That was a NIA RD-206SP, no longer made, but it retired my tuned SRF-59 to my travel bag, and has become my favored UL barefoot DX radio ever since. He seems to do at least one different radio every day, and does a good comparison with better known units. It might be worth a watch.


Re: Gary's Ultralight DX shootout

Vincenzo Sallustio
 

Gary,

Your work is greatly appreciated. I end up using a Sony TR-84. Not ultralight, but my PL-310ET just had that annoying soft mute. I do have a Sony ICF-S10MK2 which works well, but if very cheap feeling. Was wondering if there was anything else new out there that II may have missed. 

Sincerely, Vinnie


Re: "Novelty Radio"

John Ruschmeyer
 

The clear case would be required by a prison so that the radio can't be used to smuggle or hide contraband. (I'll skip the issue of whether one could unwind the coil of the AM antenna and use it to strangle someone.) I know that I've also seen pictures of clear TV sets, back in the day, also intended for prison use.

That said, there is/was a fascination with "clear" consumer products for a while, sometimes with added LED or neon lighting. I have also seen versions of radios such as the Grundig Mini 300PE in colored, translucent cases. I imagine that this is where the Amazon seller got the idea that it was a "novelty" radio.


Re: Sony SRF-59

Rik
 

EXCELLENT!  I really like that little project. Looks like ordinary insulated wire for the tuned loop. I bet it works VERY well, and was inexpensive. - FARMERIK

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