Date   

Re: Sangean DT-800

Jorge Garzón <iberiaDX@...>
 

Hi Johny and Emily, 
I am a proud owner of a Sangean DT-800, also of a Sangean DT-250 and an CC Crane Pocket. I bought this latest one because I saw one of the reviews made by the American Youtuber 'Todderbert' and the comments written on his channel board. 

Sangean DT-250. By far the most sensitive ot the three on MW with an useful volume knob and easy to use. Basic function and good audio, very good with earphones. A pity that it does not have a narrow/wide position to get a better selectivity. Good FM sensitivity and tricky selectivity, but able to work decently tropo, more difficult with e-Skip because of the selectivity. No RDS decoding. The best balance price/features, no doubt! 

Sangean DT-800. I do agree with you. (Almost) a real gem. Nice, solid, with rubber sides that avoid slipperies and add security when on hand. Quite good sensitivity (not as good as DT-250 but very close indeed) and a good selectivity (Narrow/wide). Unbeatable audio, deep and rich despite the small speaker. The only MW weakness is the LCD screen induced noise when radio signal is absent. When a signal (even weak one) is present, the LCD noise is almost non audible, but without signal at all, the inner circuit takes the screen radiated noise. It seems the pocket radio lacks an effective internal screening. It is not coming from the backlight, but the LCD itself. On FM is outstanding: able to change steps (100 kHz, 50 kHz), mute squelch on/off, and outstanding stereo audio with earphones. Unfortunately, volume control is 'up and down' buttons which is not as good as a wheel, giving less volume on MW that its little bros DT-250. Have also in mind that the DT-800 includes RDS decoding, which is just perfect for FM DXing. 

CC Crane Pocket. It has some better features (in my opinion) than DT-800. Volume control is the usual wheel, with a slight higher volume; it shows the MW narrow/wide filter (2,5 / 4 kHz) and the LCD screen can be disconnected to avoid induced noise. Unfortunately the different buttons combinations to select filters and other options are tricky and less than intuituve, with no labels on them or aside to remember functions. Slight lesser sensitivity than the DT-800 and almost the same selectivity, but the background noise of the pocket radio on MW is unbelievable high, killing most of the weak signals when DXing TA stations. A real pity and a weakness regarding the other two little Sangeans. Also, the LCD induced noise is noticeable (as in DT-800) even with the screen disconnected. Very good on FM but unfortunately no RDS decoding. 

I am still trying to understand how Todderbert review of the CC Crane Pocket gives it almost the consideration of the 'king of the DXing pocket radios' and his DT-800 review place this one in a lower position in a DXing ranking. Unbelievable!! 

I will publish soon in the IberiaDX blog a comparative "DT-800 Vs CC Crane Pocket" as I have made video recordings with both managing local, weaks and even TA signals. 

I have also seen a video (can't remember where now) with an easy way to screen internally both DT-800 and CC Crane Pocket with self adhesive copper film. The author claimed that after that add-in, the LCD noise almost dissapeared completely! 

¡73 y buen DX!


Re: Sangean DT-800

radiojayallen
 

I agree...the DT-800 is currently my favorite earbud radio (and I have many of them) and I especially like its two FM bandwidths which are a help here where the FM band is extremely crowded. It has great performance overall...I did a compete review of it a year or two ago:

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

Jay


Re: How CCrane Skywave tunes VHF Air AM and NOAA NFM transmissions?

Paul Blundell
 

Thanks. That is great information.


On Fri, 7 May 2021, 17:50 h. garcia, <pu3hag.l@...> wrote:
Hello all,

Guess I found evidence Skywave SSB uses a Si4735-D60.

I payed a visit to the excellent PU2LCR Ricardo Caratti's Si47xx Arduino Library Project at Github. The documentation  refers a few times to the  "AN332 REV 0.8 UNIVERSAL PROGRAMMING GUIDE
AMENDMENT FOR SI4735-D60 SSB AND NBFM PATCHES". It's the PDF attached.

Have you ever noticed when you switch to SSB, Si473x-based receivers mute the speaker for a while and show an animated icon? That's the microprocessor live patching the SiLabs chip with new DSP code. On pages 4 and 33 of the PDF, you can see the commands and parameters available once the SSB or NBFM patch gets loaded.





Re: How CCrane Skywave tunes VHF Air AM and NOAA NFM transmissions?

Jock Elliott
 

Interesting!


Re: How CCrane Skywave tunes VHF Air AM and NOAA NFM transmissions?

h. garcia
 

Thank you!


Re: How CCrane Skywave tunes VHF Air AM and NOAA NFM transmissions?

h. garcia
 

Hello all,

Guess I found evidence Skywave SSB uses a Si4735-D60.

I payed a visit to the excellent PU2LCR Ricardo Caratti's Si47xx Arduino Library Project at Github. The documentation  refers a few times to the  "AN332 REV 0.8 UNIVERSAL PROGRAMMING GUIDE
AMENDMENT FOR SI4735-D60 SSB AND NBFM PATCHES". It's the PDF attached.

Have you ever noticed when you switch to SSB, Si473x-based receivers mute the speaker for a while and show an animated icon? That's the microprocessor live patching the SiLabs chip with new DSP code. On pages 4 and 33 of the PDF, you can see the commands and parameters available once the SSB or NBFM patch gets loaded.





Re: How CCrane Skywave tunes VHF Air AM and NOAA NFM transmissions?

Ron Zuccalo
 

Hello. Yes 2 different chips in the.sky w
 Ssb. Aseperate one for the air band noaa and band widths. Confirmed.

On Fri, May 7, 2021, 2:08 AM h. garcia <pu3hag.l@...> wrote:
Hello everyone, happy Friday!

I was having some wandering thoughts on about certain receivers can tune bands not supported by the SiLabs Si473x IC.

Eton/Gruding Elite and XHData D808 - based on the schematics one the russian radioforum - used a clever approach: they used a TA7358 to bring the VHF Air band to an IF within Si473x front-end. The AM demodulation is done by Si4735 itself.

However, I can't find details on the CCrane Skywave SSB and it's NOAA VHF Narrow FM capability. Did CCrane included a second SiLabs C with WX band to enable reception and alerting?

Cheers!

pu3hag huelbe


Re: Tecsun PL-380 - S-meter over-reading

Paul Blundell
 

I have not owned a PL-380 for a few years but remember it being like this, jumping all over the place.


On Wed, 5 May 2021, 20:35 radiojayallen, <radiojayallen@...> wrote:
I don't have a PL-380 but in general I find these signal level readouts to be interesting and useful but not very accurately calibrated. I have seen various models with such readouts vary by several db on a given signal. Hey, even my vintage Satellit 800 and E1 don't agree.


Re: 549kHz - 2CR - Other Stations

Paul Blundell
 

The last two nights this has only had 2CR booming in, no trace of any other signals.


On Wed, 5 May 2021, 13:31 Paul Blundell via groups.io, <tanger32au=gmail.com@groups.io> wrote:
Thanks for that Gary, I will be keeping an ear out on it and see if I can get any more clues.


On Wed, May 5, 2021 at 1:23 PM Gary DeBock via groups.io <D1028Gary=aol.com@groups.io> wrote:
On Tue, May 4, 2021 at 06:02 PM, Paul Blundell wrote:
Over the past few nights, due to packing to move house I have been up and about later than normal, I have noticed a very faint signal under this but have not had any luck with an ID or any information.
Last night when the ABC station dropped audio just before the news broadcast, I heard some music, it sounded not "main stream", maybe Maori in nature?

Any ideas on a possible station?

Paul
Paul,

There shouldn't be any Maori on 549. The Kiwi Maori net frequencies are 585-603-765-1161-1440.

On 549 the dominant Kiwi station at the Oregon "Kiwi Cliff" has been 549-Trackside, and that was also the dominant 549 station when I was in the Cook Islands three years ago. But I understand that the Kiwi Trackside network is now in limbo, and about to change to something else.

Gary DeBock (in Puyallup, WA, USA)



--
Paul


How CCrane Skywave tunes VHF Air AM and NOAA NFM transmissions?

h. garcia
 

Hello everyone, happy Friday!

I was having some wandering thoughts on about certain receivers can tune bands not supported by the SiLabs Si473x IC.

Eton/Gruding Elite and XHData D808 - based on the schematics one the russian radioforum - used a clever approach: they used a TA7358 to bring the VHF Air band to an IF within Si473x front-end. The AM demodulation is done by Si4735 itself.

However, I can't find details on the CCrane Skywave SSB and it's NOAA VHF Narrow FM capability. Did CCrane included a second SiLabs C with WX band to enable reception and alerting?

Cheers!

pu3hag huelbe


Re: Sangean DT-800

Emily Keene
 

I just paid $60, shipped, for a Sangean DT-800 through Amazon.

Emily Hastings Keene, New Jersey

Sent from my Virgin Mobile Phone.


Re: Couple new radios on the way!!!

Paul Blundell
 

I have also found this with some radios.


On Fri, 7 May 2021, 05:15 Johnny via groups.io, <jlochey=yahoo.com@groups.io> wrote:
Hi all,

Update:

Of these radios, the following had to go back because they were just not quality enough.
  • Vonidor cheap AM/FM "old school" radio - Vonidor
  • PowerBear cheap AM/FM "old school" radio - PowerBear

Just FYI.


Johnny


Re: Sangean DT-800

Paul Blundell
 

Sounds good, how much was it?


On Fri, 7 May 2021, 05:12 Johnny via groups.io, <jlochey=yahoo.com@groups.io> wrote:
Hi all,

Just received my Sangean DT-800 in the mail and what a gem it is!!!

I find it quite sensitive on AM/FM with a nice set of features that I find very useful.  It even has the ability to turn off "muting".  Nice!  :)

I'm finding it to be the best of my radios in this "handheld form factor" so far, narrowly beating out my CCrane Pocket, that I also love!

Anyone else like this radio?


Johnny


Re: Sangean DT-800

Johnny
 

Hi Emily,

I liked it so much a bought two!  <blush!>


Johnny


Re: Sangean DT-800

Emily Keene
 

I just ordered the Sangean DT800, and now I am really looking forward to its arrival!

Emily Hastings Keene, New Jersey



Sent from my Virgin Mobile Phone.


Re: radiowe r-108 vs tecsun pl-310et

Johnny
 

Hi both,

I have just received my Tecsun PL-310ET and plan to compare it shortly to my Radiwow R-108 (still yet to arrive).  I will let you know what my observations are of these two radios.

Thanks!


Johnny


Re: Couple new radios on the way!!!

Johnny
 

Hi all,

Update:

Of these radios, the following had to go back because they were just not quality enough.
  • Vonidor cheap AM/FM "old school" radio - Vonidor
  • PowerBear cheap AM/FM "old school" radio - PowerBear

Just FYI.


Johnny


Sangean DT-800

Johnny
 

Hi all,

Just received my Sangean DT-800 in the mail and what a gem it is!!!

I find it quite sensitive on AM/FM with a nice set of features that I find very useful.  It even has the ability to turn off "muting".  Nice!  :)

I'm finding it to be the best of my radios in this "handheld form factor" so far, narrowly beating out my CCrane Pocket, that I also love!

Anyone else like this radio?


Johnny


1170 khz

patrice.privat
 

Hi

This morning around 0645 CEST , I tuned to 1170 khz.
I expected R Capodistria but heard R Gorizia with Italian pop songs.
Does someone confirm this replacement ?

Grazie

Patrice


A mute problem in PL380

Zacharias Liangas
 

To anyone using pl380
My item was in the first produced series
After turning to a strong station and changing frequency the signal readout remained high even in frequencies without signal and sounds as muted. This is possibly an AGC problem?
Does it happen to anyone's other here?

Also is noticed more analysis in my site 
https://sites.google.com/site/zliangas/pl380
In the SW part

Thanks

2981 - 3000 of 34039