Date   

Re: Tecsun PL-330 available

Paul S. in CT
 

Yup, thats what I interpreted it to be. Its obviously looking for processed audio input.

Regards
Paul S. in CT FN31nl


DX750 - 1494kHz - 2AY

Paul Blundell
 

While undertaking my DX750 project, I have come across a strange situation. 2AY on 1494kHz seems to be MIA. 
Over the past few days and nights, I have been trying to hunt this down with no luck so far, it is the only station in Australia on this frequency (black circle) and I am able to hear other stations which are close to this in frequency (green circles)

Does anybody know if they are having issues or have gone off the air?

Paul




Re: ODP: [UltralightDX] The RADIOWOW R-108 is in the Amazon Prime-Day deals for $41.57

Paul Blundell
 

Thanks for the ideas, I might give this a try with some of my radios.

Paul

On Tue, Oct 20, 2020 at 5:38 PM mediumwavedx <desertbilly@...> wrote:
I was thinking one might put some gold or brownish colored cellophane over the display. That would reduce the brightness and also eliminate the bluish tint. Sounds silly but it might work! Now, where can we find that?

Then it hit me that those grayish cellophane packets that ICs come in for experimenters might do it. I recently bought some parts and I had some so I tried it. It works. Some packets are darker than others and work better.

I'd hate to tear into my new little radio just yet!

Bill



--
Paul


Re: The RADIOWOW R-108 is in the Amazon Prime-Day deals for $41.57

mariusz.dorota@gmail.com <mariusz.dorota@...>
 

That what i was thinking, but in the end I decided to open radio unit. It is easy to open, but then you have to separate pcb from Keys and finally take off white sticker with aluminium foil which cover the led. When you do this you can Simply change led to any 3mm led whatever color and brightness you want - there’s  a lot of space to solder  it or if you don’t want to mess with solder gun you can paint the led or cover it with some sort of filter. Overall not a very difficult task but a lot of tiny screws to deal with

Wysłane z iPhone'a

Wiadomość napisana przez mediumwavedx <desertbilly@...> w dniu 20.10.2020, o godz. 08:38:

I was thinking one might put some gold or brownish colored cellophane over the display. That would reduce the brightness and also eliminate the bluish tint. Sounds silly but it might work! Now, where can we find that?

Then it hit me that those grayish cellophane packets that ICs come in for experimenters might do it. I recently bought some parts and I had some so I tried it. It works. Some packets are darker than others and work better.

I'd hate to tear into my new little radio just yet!

Bill


Re: Tecsun PL-330 available

mediumwavedx
 

The CD1622CB seems to be a dual channel audio amp. The Chinese do make a Si4735 look-alike called a KT0936M. Has LW/MW/FM/SW. Similar specs.

Bill


Re: ODP: [UltralightDX] The RADIOWOW R-108 is in the Amazon Prime-Day deals for $41.57

mediumwavedx
 

I was thinking one might put some gold or brownish colored cellophane over the display. That would reduce the brightness and also eliminate the bluish tint. Sounds silly but it might work! Now, where can we find that?

Then it hit me that those grayish cellophane packets that ICs come in for experimenters might do it. I recently bought some parts and I had some so I tried it. It works. Some packets are darker than others and work better.

I'd hate to tear into my new little radio just yet!

Bill


Re: Tecsun PL-330 available

Paul Blundell
 


On Tue, Oct 20, 2020 at 3:10 PM Paul S. in CT <dxrx@...> wrote:
I have reports from aliexpress users that the chipset is a "CD1622" Chinese variant to the SiLabs 4735.
I'm not prying mine open just yet. But I may get around to an external 26650 size LiIon alternate power source. This size in the range of 4000-5000 mAHr.

Regards
Paul S. in CT FN31nl







--
Paul


File /1. Start Here/An Introduction To Ultralight MW Radio DXing_2020.pdf uploaded #file-notice

main@UltralightDX.groups.io Notification <noreply@...>
 

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

By: Paul Blundell

Description:
An Introduction To Ultralight MW Radio DXing - Updated October 2020.


Re: Tecsun PL-330 available

Paul S. in CT
 

I have reports from aliexpress users that the chipset is a "CD1622" Chinese variant to the SiLabs 4735.
I'm not prying mine open just yet. But I may get around to an external 26650 size LiIon alternate power source. This size in the range of 4000-5000 mAHr.

Regards
Paul S. in CT FN31nl


Re: Soft mute disable

Paul S. in CT
 

Regarding Soft-Mute on the SW Frequencies.
It appears that there is a way to defeat the Soft-Mute in my Tecsun PL-330.
A bit tricky, and found it by listening to SW after AM-BCB.

1.) Tune-in to your fave AM-BCB station, and set the Fine Tune to 1kHz,
then tune 1kHz above/below to defeat the Soft-Mute.

2.) Change bands to SW and tune-in to a time-signal station 3331, 5001,
or 10001 kHz... note the deliberate offset of 1kHz. Make sure Fine Tune
is still engaged. On my PL-330 the signal reading looks like 31:00. By
tuning to correct frequency, the signal reading is 31:14. Note the 00
of the original reception. Now alter the tuning 1kHz, and the display
should show 00 again.

I then checked Radio Romania Int'l (RRI) on 7375kHz and the soft-mute was disabled when offset.
I then shut off the radio with this trick enabled, and upon power on the softmute was still disabled.

But then I wonder why the set did not defeat the soft-mute when originally tested last week. It could be that I did not engage the Fine Tune AND offset by 1kHz. Not sure... but this works now.

It may only apply to my model, but worth a couple of minutes to check.

Regards
Paul S. in CT FN31nl


Re: ODP: [UltralightDX] The RADIOWOW R-108 is in the Amazon Prime-Day deals for $41.57

Paul Blundell
 

Regarding the brightness of the display, what is the best way to reduce this? One of my radios "lights up the room" when used of a night time.

Paul


Long Term DX Project - 19/10/2020

Paul Blundell
 

Date: 19/10/2020

Time: 23:30

Location: Home, Launceston Tasmania

Notes: A late night session at home. Using just my TEAC PR130 barefoot, I was able to log all 10 stations. The 3 x 50KW big guns of 3WV, 3RN and 3LO all hit excellent signal levels and 2CR on 549kHz was not far behind this. 3KND on 1503kHz struggled a little early in the session but later on it hit good signal levels.

 

FREQ

CALLSIGN

LOGGED

DATE

RADIO

AERIAL

531

3GG

GOOD

18/10/2020

TEAC PR130

Internal

549

2CR

GOOD

18/10/2020

TEAC PR130

Internal

594

3WV

EXCELLENT

18/10/2020

TEAC PR130

Internal

621

3RN

EXCELLENT

18/10/2020

TEAC PR130

Internal

774

3LO

EXCELLENT

18/10/2020

TEAC PR130

Internal

1053

2CA

AVERAGE

18/10/2020

TEAC PR130

Internal

1179

3RPH

GOOD

18/10/2020

TEAC PR130

Internal

1341

HPON GEELONG

GOOD

18/10/2020

TEAC PR130

Internal

1422

HPON MELBOURNE

GOOD

18/10/2020

TEAC PR130

Internal

1503

3KND

GOOD

18/10/2020

TEAC PR130

Internal


Re: ODP: [UltralightDX] The RADIOWOW R-108 is in the Amazon Prime-Day deals for $41.57

mediumwavedx
 
Edited

Agreed, the display is very bright and has a slight bluish tint to it which might offend some people. I'm an older guy (73 soon) and don't see so well unless the brightness and contrast is turned up so the display works well for me.
 
The unit does indeed have some weird birdies as many of these small DSP units do. One notable one on 1400 KHz, but often it settles down and disappears after staying on the frequency for awhile. Not sure what causes this.
 
I don't find the single band switch objectionable. In a way it's less confusing for me. The CCrane Skywave has AM and FM on a separate button, so you can go directly there with one press. The R-108 just puts everything on one carousel button. When you carousel around to shortwave it lands you on the previous SW band you were tuned to. That's OK, let's say it was 41 meters. But to get to the next SW band, the 31 meter band, you have to manually enter a frequency in that band's range. In other words, I don't see a way to carousel through the individual shortwave bands. Maybe I'm missing something.
 
On the dBu readings, at least for the early Tecsun radios (310, 380), the mediumwave RSSI dBu value was the actual voltage across the ferrite loopstick, input to the preamp. On shortwave, it was taken at the output of the preamp. This is per Scott Willingham, one of the designers of the Si473x series, reported in a review I did on the PL-380 many years ago. I didn't ask about FM, but is most likely at the output of the preamp. Newer radios may measure mediumwave dBu at a different point, but I suspect the cheaper DSP radios still take the mediumwave dBu value off the loopstick. Larger DSP radios like the PL-880 have the chip downline, so the measurement is taken from that point. The handy thing about this with these little units is you get a direct comparison of the loopstick's receive efficiency on mediumwave (and longwave too). I wish CCrane would have included the RSSI and SNR dB values on the Skywave's display.
 
Audio quality is outstanding.
 
Sensitivity better than my PL-380, but about equal the my Skywave.
 
It's a definite keeper for me.

Bill


Long Term DX Project - 18/10/2020

Paul Blundell
 

Date: 19/10/2020

Time: 15:30

Location: Home, Launceston Tasmania

Notes: A mid afternoon session with a mixed bag of signals. 3RN on 621kHz hit excellent signal levels with 3LO on 774kHz also being received at good signal levels. The top end of the band was pretty much dead (as I would expect) with only the HPON stations on 1341kHz and 1422kHz providing any trace of a signal.

 

FREQ

CALLSIGN

LOGGED

DATE

RADIO

AERIAL

531

3GG

AVERAGE

18/10/2020

AR-1733

3" FSL

549

2CR

POOR

18/10/2020

AR-1733

3" FSL

594

3WV

AVERAGE

18/10/2020

AR-1733

3" FSL

621

3RN

EXCELLENT

18/10/2020

AR-1733

3" FSL

774

3LO

GOOD

18/10/2020

AR-1733

3" FSL

1053

2CA

UNLOGGED

18/10/2020

AR-1733

3" FSL

1179

3RPH

UNLOGGED

18/10/2020

AR-1733

3" FSL

1341

HPON GEELONG

WEAK

18/10/2020

AR-1733

3" FSL

1422

HPON MELBOURNE

POOR

18/10/2020

AR-1733

3" FSL

1503

3KND

UNLOGGED

18/10/2020

AR-1733

3" FSL


Re: Review - Digitech AR-1733 DSP MW/FM/LW/SW/Air World Band Radio Receiver

Paul Blundell
 

Thanks for the information. As I use headphones for most of my listening, I have not noticed the issues with the AGC, maybe you had an early model / faulty unit?

The great thing about this hobby is that we can each use what works for us.

Paul

On Sat, Oct 17, 2020 at 1:02 AM Michael Schuster <schuster.ma@...> wrote:
While It's great that this radio has continued to work out well for you, I am somewhat puzzled by the love.

When the CCrane Skywave was announced it was noticed that the Redsun-produced AR-1733 bore a remarkable physical resemblance to the upcoming product from Ccrane. Eventually it became apparent that this was the starting point from which the Skywave was redesigned as a new model.

Intrigued by this, I ordered one from Jaycar's US web site and played with it for while; was totally unimpressed. The main issue was the lack of any effective AGC on the AM-modulated bands. It was impossible to get any useable volume out of the thing even on moderately strong signals.

Rather than return it, I sent mine to Gary DeBock (who was gracious enough to offer to repay me for it!) who did a complete teardown. He he subsequently compared with a teardown of the Skywave once it hit the market. As noted in his initial review of the Skywave it has completely different redesigned internals which, among other things, corrected the AGC issue. Perhaps later production runs of the AR-1733 addressed this.

I see the Skywave listed on Amazon AUS but there is no price as they don't have any stock. 



--
Paul


Oklahoma TP DX 10-18-20

Richard Allen
 

TP DX was somewhat in the tank here this morning.

567 JOIK poor at 1238.

558 unID heterodyne (no audio) at 1220.

594 JOAK very poor with KXSP 590 QRM at 1202; poor at 1236.

702 JOKD poor NHK2 at 1226.

747 JOIB very poor at 1151; fair briefly at 1240 LSR.

774 JOUB fair in KSPI 780 splatter at 1156.

972 HLCA barely audible TS at 1200; poor at 1204 and 1247.

891 unID heterodyne at 1223.

1566 HLAZ poor s/on to Japan at 1230; poor at 1245.

Skywave SSB with 8-FSL.


Good DX all,


Richard Allen,

near Perry OK USA.



ODP: [UltralightDX] The RADIOWOW R-108 is in the Amazon Prime-Day deals for $41.57

mariusz.dorota@gmail.com <mariusz.dorota@...>
 

I would say R-108 display is way too bright, it real bothers me in the night, so I decided to change or paint lCD led. Switching bands on r-108 is tideous as it is done with one buton, there’s also strange high pitch noise on FM when listning on low level thorough headphones. Other that that it is very good receiver, sensiivity on MW is better than pl-310, on fm pretty the same (though pl-310 propably has some stronger preamplifier because dbu meter shows higher numbers on tecsun), sw i think is better on r-108, on the other hand LW is better on pl-310

 

Wysłane z aplikacji Poczta dla Windows 10

 

Od: mediumwavedx
Wysłano: niedziela, 18 października 2020 12:13
Do: main@ultralightdx.groups.io
Temat: Re: [UltralightDX] The RADIOWOW R-108 is in the Amazon Prime-Day deals for $41.57

 

I got mine two days ago. I'm extremely happy with it.

 

The build quality is very good. Excellent sensitivity on medium wave. Shortwave is good too. I'm also enjoying the air band. Buttons work well and are not as stiff as the PL-380. I'm hoping they will hold up as the radio ages. It has a beautifully-lit display which is very easy to read.

 

It does everything the C. Crane Skywave does plus more and was about half the price at $41. The R-108 has the ability to display the RSSI signal strength and SNR signal-to-noise ratio too, which the Skywave does not. For a DXer and one who like measurements, this is essential to me.

 

Bill

 


Re: The RADIOWOW R-108 is in the Amazon Prime-Day deals for $41.57

mediumwavedx
 

I got mine two days ago. I'm extremely happy with it.
 
The build quality is very good. Excellent sensitivity on medium wave. Shortwave is good too. I'm also enjoying the air band. Buttons work well and are not as stiff as the PL-380. I'm hoping they will hold up as the radio ages. It has a beautifully-lit display which is very easy to read.
 
It does everything the C. Crane Skywave does plus more and was about half the price at $41. The R-108 has the ability to display the RSSI signal strength and SNR signal-to-noise ratio too, which the Skywave does not. For a DXer and one who like measurements, this is essential to me.
 
Bill


Re: The RADIOWOW R-108 is in the Amazon Prime-Day deals for $41.57

Paul Blundell
 

Sounds promising.

Paul

On Sun., 18 Oct. 2020, 02:14 Gary Sargent, <GarySargent@...> wrote:
I did order an R-108 on the Amazon Prime day price. I just received it this morning and I'm beginning to evaluate it. I noticed an earlier message thread on the warranty offered by 'RadioWow' on the radio as being essentially worthless. NO real surprise there on any low to moderate priced items from China as being essentially throwaway items.

Due to the covid situation, Amazon has extended the return time frame for purchases until 1/31/21. So I have basically a 90 day plus warranty time period on the radio!

My 30 minute impression of the R-108. Speaker output sounds very good for a tiny radio. Good volume. FM sensitivity seems typical for DSP radios these days. AM reception here (daytime) also seems typical. The radio looks to be solidly constructed. Looks to be a keeper so far. 

KE8WO


Re: The RADIOWOW R-108 is in the Amazon Prime-Day deals for $41.57

Gary Sargent
 
Edited

I did order an R-108 on the Amazon Prime day price. I just received it this morning and I'm beginning to evaluate it. I noticed an earlier message thread on the warranty offered by 'RadioWow' on the radio as being essentially worthless. NO real surprise there on any low to moderate priced items from China as being essentially throwaway items.

Due to the covid situation, Amazon has extended the return time frame for purchases until 1/31/21. So I have basically a 90 day plus warranty time period on the radio!

My 30 minute impression of the R-108. Speaker output sounds very good for a tiny radio. Good volume. FM sensitivity seems typical for DSP radios these days. AM reception here (daytime) also seems typical. The radio looks to be solidly constructed. Looks to be a keeper so far. 

Update:
  • I did a middle of night casual comparison of the R-108 with my CountyComm GP5 (aka PL365) on 6 or 8 weak AM BCB signals. The R108 was more listenable in all cases. The sensitivity seems a little better on the R108 and the audio was definitely more listenable compared to the GP5. I suspect this is due to the superior speaker and better audio processing so far as suppressing the hissy noise that was more prominent on the GP5.
  • My 'ATS' AM BCB scan found 70 stations. Perhaps 10 or 12 were not listenable and I easily deleted a few. A deleted memory essentially leaves an empty channel in the middle of the full memories. I would prefer that the R108 would automatically 'squash' the memory channel's to eliminate the empty memories or just sorted the memories by the frequency. (People who maintain a memory reference sheet would not want this!) 
  • The tuning knob as two selectable speeds. The actual control takes a little force to rotate from one detent to the next.. Not really stiff but far from being able to 'spin the tuning dial' 
  • The supplied user manual looks to be complete and well written.
  • As of today, 10/18/20, there is a $10 off coupon on the R108 on Amazon .. making the price to be $41.97 .. which is just pennies more that the Prime day price.

Update #2 The battery life is on the order of 8 to 10 hours of listening time. My R108 seems to also draw some level of current when not even on such that it will slowly drain the battery on it's own. This is a minor inconvenience. Overall, a nice solid little radio that works well for general usage.

KE8WO

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