Date   

Tecsun PL-330 available

Paul S. in CT
 

Tecsun has a new model PL-330 that is a DSP/SYNC/SSB model about the size of a PL-310et. I have viewed it at aliexpress and can confirm details. It is under 20 cubic inches and under $100. The current pricing seen there is about US$75. Be aware that this radio uses a Li-Ion flat-pack battery just like a celphone/smartphone. The supplied battery is a BL-5c, also available in the $3 to $5 range. Capacity is about 1000mAhr, and I would recommend a spare. As far as I know, battery charging is in the radio... external chargers for this battery are available. Or you might have an OLD nokia phone that uses this battery, phone chargers are 'more reliable'.

Regards
Paul S. in CT FN31nl


Re: Discovery of FSL Antenna Phasing for Front to Side Rejection

Gary DeBock
 

Thanks Michael, Sudipta, Craig, aa, Jay, Max and Paul,

Your comments are all very much appreciated!

This dual FSL nulling procedure has been tested over and over with many pest stations, and works very well once you get the hang of it, and follow the instructions. I have some recommendations for the best results (please refer to the attached photo).

1)  The stronger the pest station, the more razor-sharp will be the null, both with the radio loopstick and with the "Nulling FSL's" variable cap setting. Best results will be obtained by placing the radio down in the exact null position (however "hair trigger" that might be).
2)  You can still null out a pest when DXing conditions are poor, but you may not receive any weak DX station in the null position. On the other hand, when conditions are good, you may end up with two or more DX stations fighting it out with the pest in its null position.
3)  Make sure that you have the exact same inductive coupling distance between the radio and the two FSL antennas (although the two FSL's will be perpendicular to each other, as shown in the attached photo). If you are familiar with using an FSL antenna, you should have some practice determining the best inductive coupling distance on different frequencies (such as around 2 inches for 1700 kHz, around 4 inches for 1000 kHz, etc.). Or, you can simply listen for the best gain boost when you move the "Reception FSL" up to the radio-- that will be the best inductive coupling distance.
4)  So far these experiments have concentrated on receiving DX stations on the same frequency as a pest station. Although this procedure should be effective in nulling out domestic stations on frequencies like 540, 630, 720, 810 (etc.) when chasing transoceanic DX, further experimentation will be conducted for nulling out domestic splatter on slightly different frequencies than a transoceanic target station. If those experiments prove successful, the compact FSL antenna will become far more effective for transoceanic DXing on flat ocean beaches, where domestic splatter runs wild (unlike at ocean cliffs).

73, Gary DeBock (in Puyallup, WA, USA)  
   


Re: Discovery of FSL Antenna Phasing for Front to Side Rejection

Paul Blundell
 

Great work as always.

Paul


Re: C.Crane Skywave Vs. XHDATA D-808... 1 kHz DSP Audio Shootout

Max Italy
 
Edited

I do not consider the 1 kHz filter a usable option. For me the winner is the one that gives a better base for further editing the audio file and make the voice clear. I think it will be the Xhdata.


Re: Discovery of FSL Antenna Phasing for Front to Side Rejection

Max Italy
 

Good job Gary but now you have a problem bringing 2 FSL along on DX-peditions :D


Re: C.Crane Skywave Vs. XHDATA D-808... 1 kHz DSP Audio Shootout

Tom_D
 

XHDATA D-808 has a bit less intrusive QRM


Re: Discovery of FSL Antenna Phasing for Front to Side Rejection

radiojayallen
 

Gary,

That is very cool and your description with the picture makes perfect sense...great idea! I have tried similar things with some positive results in the past using two Twin Coil Antennas and it did work to some extent. 

Jay


Re: Discovery of FSL Antenna Phasing for Front to Side Rejection

a a
 

I have been using a fsl and a long wire to good effect on 1.8mhz to null nearby solar panel interference,its been a relevation i can use the band again...love the fsl. hail gary... de alec g8gon

On Wednesday, 23 September 2020, 23:20:08 BST, Gary DeBock via groups.io <d1028gary@...> wrote:


On Wed, Sep 23, 2020 at 09:38 AM, C B wrote:
Great work phasing the FSLs producing effective results! One DXer's pest nulled to receive another DXer's pest! :-) Well done.
Thanks Craig,
     That's true about one DXer's pest was nulled to receive another DXer's pest, but my pest is a 50 kW Mega Pest, while yours is only a 5 kW mini pest!

Gary


Re: Discovery of FSL Antenna Phasing for Front to Side Rejection

Gary DeBock
 

On Wed, Sep 23, 2020 at 09:38 AM, C B wrote:
Great work phasing the FSLs producing effective results! One DXer's pest nulled to receive another DXer's pest! :-) Well done.
Thanks Craig,
     That's true about one DXer's pest was nulled to receive another DXer's pest, but my pest is a 50 kW Mega Pest, while yours is only a 5 kW mini pest!

Gary


Re: Discovery of FSL Antenna Phasing for Front to Side Rejection

C B
 

Hi Gary,

Great work phasing the FSLs producing effective results! One DXer's pest nulled to receive another DXer's pest! :-) Well done.

73,

Craig Barnes
Wheat Ridge, CO

On Wednesday, September 23, 2020, 08:08:38 AM MDT, Sudipta Ghose VU2UT <oneghose@...> wrote:


Thanks Gary. Must keep a hard copy.
Regards,
Sudipta

On Wed, Sep 23, 2020 at 5:08 PM Gary DeBock via groups.io <D1028Gary=aol.com@groups.io> wrote:
After many dual FSL antenna experiments I've finally determined how to effectively cancel out QRM from a local pest that is off to the side (90 degrees different) from a weak DX station, although I'm not quite sure of the theory behind this discovery.

This experiment was an attempt to cancel out QRM from a local pest, 950-KJR in Seattle, WA (35 miles/ 56 km to the north) and chase 950-KKSE in Parker, CO (1005 miles/ 1617 km to the southeast) during the early morning hours. The receiver was a basic (non-SSB) C.Crane Skywave, and two identical 5 inch ferrite rod FSL antennas were used. Please refer to the attached photo to follow this description.

Step 1)  Null out the pest station with the portable radio's loopstick (away from the FSL antennas). Set the radio down in this nulled position, so that the pest station is as weak as possible, while ensuring that there is space to set up the FSL antennas to the back and side (see photo).
Step 2)  Take the "Reception FSL" and use it to peak the pest station's frequency, setting it up parallel to the portable radio as shown, at the position providing the maximum inductive coupling gain. This will temporarily boost up the pest station, which previously was nulled.
Step 3)  Take the "Nulling FSL" and pretune the frequency to that of the pest station. You can do this either by adjusting the variable cap plates to match those of the "Reception FSL," or by temporarily peaking the pest station's signal in a position in front of the portable radio. After setting this frequency, set the "Nulling FSL" off to the side of the portable radio as shown, with the spacing identical to the spacing between the radio and the "Reception FSL."
Step 4)  Slowly and carefully tune the "Nulling FSL" until you hear the pest station's signal take a sharp drop. This setting will be very sharp, but once you find this position you will have nulled out the pest very effectively, and if another station is on the frequency, it may suddenly become dominant, even if it is far away (like 950-KKSE in Denver).

Some MP3's from this morning's experiments:

950-KJR in nulled position with the portable only  https://dreamcrafts.box.com/s/c2hkjl979oz12m3dcbcr9uz73ziid2y3
950-KKSE generally dominant over the local pest KJR when the "Nulling FSL" is peaked  https://dreamcrafts.box.com/s/5ctshbrf5tk9duwyruimgq85ml7ngn8c

More experiments will be conducted with identical FSL antennas in an attempt to provide a front-to-back ratio for the nulling of domestic splatter, and front to side nulling of the same splatter. If successful, this would dramatically increase the effectiveness of FSL antennas on flat ocean beaches, where domestic splatter from both the back and side is routine.

Gary DeBock (in Puyallup, WA, USA)   
    



--
One of those ... ...


Re: Discovery of FSL Antenna Phasing for Front to Side Rejection

Sudipta Ghose VU2UT
 

Thanks Gary. Must keep a hard copy.
Regards,
Sudipta


On Wed, Sep 23, 2020 at 5:08 PM Gary DeBock via groups.io <D1028Gary=aol.com@groups.io> wrote:
After many dual FSL antenna experiments I've finally determined how to effectively cancel out QRM from a local pest that is off to the side (90 degrees different) from a weak DX station, although I'm not quite sure of the theory behind this discovery.

This experiment was an attempt to cancel out QRM from a local pest, 950-KJR in Seattle, WA (35 miles/ 56 km to the north) and chase 950-KKSE in Parker, CO (1005 miles/ 1617 km to the southeast) during the early morning hours. The receiver was a basic (non-SSB) C.Crane Skywave, and two identical 5 inch ferrite rod FSL antennas were used. Please refer to the attached photo to follow this description.

Step 1)  Null out the pest station with the portable radio's loopstick (away from the FSL antennas). Set the radio down in this nulled position, so that the pest station is as weak as possible, while ensuring that there is space to set up the FSL antennas to the back and side (see photo).
Step 2)  Take the "Reception FSL" and use it to peak the pest station's frequency, setting it up parallel to the portable radio as shown, at the position providing the maximum inductive coupling gain. This will temporarily boost up the pest station, which previously was nulled.
Step 3)  Take the "Nulling FSL" and pretune the frequency to that of the pest station. You can do this either by adjusting the variable cap plates to match those of the "Reception FSL," or by temporarily peaking the pest station's signal in a position in front of the portable radio. After setting this frequency, set the "Nulling FSL" off to the side of the portable radio as shown, with the spacing identical to the spacing between the radio and the "Reception FSL."
Step 4)  Slowly and carefully tune the "Nulling FSL" until you hear the pest station's signal take a sharp drop. This setting will be very sharp, but once you find this position you will have nulled out the pest very effectively, and if another station is on the frequency, it may suddenly become dominant, even if it is far away (like 950-KKSE in Denver).

Some MP3's from this morning's experiments:

950-KJR in nulled position with the portable only  https://dreamcrafts.box.com/s/c2hkjl979oz12m3dcbcr9uz73ziid2y3
950-KKSE generally dominant over the local pest KJR when the "Nulling FSL" is peaked  https://dreamcrafts.box.com/s/5ctshbrf5tk9duwyruimgq85ml7ngn8c

More experiments will be conducted with identical FSL antennas in an attempt to provide a front-to-back ratio for the nulling of domestic splatter, and front to side nulling of the same splatter. If successful, this would dramatically increase the effectiveness of FSL antennas on flat ocean beaches, where domestic splatter from both the back and side is routine.

Gary DeBock (in Puyallup, WA, USA)   
    



--
One of those ... ...


Re: Discovery of FSL Antenna Phasing for Front to Side Rejection

Michael.2E0IHW
 

Yep, this works.
I've been applying the same principle with an external ferrite rod to squash QRM and QRN for many years now.

Michael UK
.........................................................................................

On 23/09/2020 12:38, Gary DeBock via groups.io wrote:
After many dual FSL antenna experiments I've finally determined how to effectively cancel out QRM from a local pest that is off to the side (90 degrees different) from a weak DX station, although I'm not quite sure of the theory behind this discovery.

This experiment was an attempt to cancel out QRM from a local pest, 950-KJR in Seattle, WA (35 miles/ 56 km to the north) and chase 950-KKSE in Parker, CO (1005 miles/ 1617 km to the southeast) during the early morning hours. The receiver was a basic (non-SSB) C.Crane Skywave, and two identical 5 inch ferrite rod FSL antennas were used. Please refer to the attached photo to follow this description.

Step 1)  Null out the pest station with the portable radio's loopstick (away from the FSL antennas). Set the radio down in this nulled position, so that the pest station is as weak as possible, while ensuring that there is space to set up the FSL antennas to the back and side (see photo).
Step 2)  Take the "Reception FSL" and use it to peak the pest station's frequency, setting it up parallel to the portable radio as shown, at the position providing the maximum inductive coupling gain. This will temporarily boost up the pest station, which previously was nulled.
Step 3)  Take the "Nulling FSL" and pretune the frequency to that of the pest station. You can do this either by adjusting the variable cap plates to match those of the "Reception FSL," or by temporarily peaking the pest station's signal in a position in front of the portable radio. After setting this frequency, set the "Nulling FSL" off to the side of the portable radio as shown, with the spacing identical to the spacing between the radio and the "Reception FSL."
Step 4)  Slowly and carefully tune the "Nulling FSL" until you hear the pest station's signal take a sharp drop. This setting will be very sharp, but once you find this position you will have nulled out the pest very effectively, and if another station is on the frequency, it may suddenly become dominant, even if it is far away (like 950-KKSE in Denver).

Some MP3's from this morning's experiments:

950-KJR in nulled position with the portable only  https://dreamcrafts.box.com/s/c2hkjl979oz12m3dcbcr9uz73ziid2y3
950-KKSE generally dominant over the local pest KJR when the "Nulling FSL" is peaked  https://dreamcrafts.box.com/s/5ctshbrf5tk9duwyruimgq85ml7ngn8c

More experiments will be conducted with identical FSL antennas in an attempt to provide a front-to-back ratio for the nulling of domestic splatter, and front to side nulling of the same splatter. If successful, this would dramatically increase the effectiveness of FSL antennas on flat ocean beaches, where domestic splatter from both the back and side is routine.

Gary DeBock (in Puyallup, WA, USA)  


Discovery of FSL Antenna Phasing for Front to Side Rejection

Gary DeBock
 

After many dual FSL antenna experiments I've finally determined how to effectively cancel out QRM from a local pest that is off to the side (90 degrees different) from a weak DX station, although I'm not quite sure of the theory behind this discovery.

This experiment was an attempt to cancel out QRM from a local pest, 950-KJR in Seattle, WA (35 miles/ 56 km to the north) and chase 950-KKSE in Parker, CO (1005 miles/ 1617 km to the southeast) during the early morning hours. The receiver was a basic (non-SSB) C.Crane Skywave, and two identical 5 inch ferrite rod FSL antennas were used. Please refer to the attached photo to follow this description.

Step 1)  Null out the pest station with the portable radio's loopstick (away from the FSL antennas). Set the radio down in this nulled position, so that the pest station is as weak as possible, while ensuring that there is space to set up the FSL antennas to the back and side (see photo).
Step 2)  Take the "Reception FSL" and use it to peak the pest station's frequency, setting it up parallel to the portable radio as shown, at the position providing the maximum inductive coupling gain. This will temporarily boost up the pest station, which previously was nulled.
Step 3)  Take the "Nulling FSL" and pretune the frequency to that of the pest station. You can do this either by adjusting the variable cap plates to match those of the "Reception FSL," or by temporarily peaking the pest station's signal in a position in front of the portable radio. After setting this frequency, set the "Nulling FSL" off to the side of the portable radio as shown, with the spacing identical to the spacing between the radio and the "Reception FSL."
Step 4)  Slowly and carefully tune the "Nulling FSL" until you hear the pest station's signal take a sharp drop. This setting will be very sharp, but once you find this position you will have nulled out the pest very effectively, and if another station is on the frequency, it may suddenly become dominant, even if it is far away (like 950-KKSE in Denver).

Some MP3's from this morning's experiments:

950-KJR in nulled position with the portable only  https://dreamcrafts.box.com/s/c2hkjl979oz12m3dcbcr9uz73ziid2y3
950-KKSE generally dominant over the local pest KJR when the "Nulling FSL" is peaked  https://dreamcrafts.box.com/s/5ctshbrf5tk9duwyruimgq85ml7ngn8c

More experiments will be conducted with identical FSL antennas in an attempt to provide a front-to-back ratio for the nulling of domestic splatter, and front to side nulling of the same splatter. If successful, this would dramatically increase the effectiveness of FSL antennas on flat ocean beaches, where domestic splatter from both the back and side is routine.

Gary DeBock (in Puyallup, WA, USA)   
    


NRC/IRCA CPC HSFB & COVID-19 9-22-20

Les Rayburn
 


The Courtesy Program Committee (CPC) of the NRC and IRCA are tracking the impact of COVID-19 on high school football this year. We hope this spreadsheet aids you in logging some new stations. Many states have delayed the start of their season, which means HSFB will go later into the Fall this year than normal—meaning less competition from summer static. 

Go get ‘em! 

Thanks to CPC Members: 

Joseph Miller, KJ8O
Paul Walker




73,

Les Rayburn, N1LF
121 Mayfair Park
Maylene, AL 35114
EM63nf

NRC & IRCA Courtesy Program Committee Chairman
Member WTFDA, MWC

Perseus SDR, Elad FDM-S2 SDR, AirSpy + Discovery, SDRPlay RSP-2 Pro, Sony XDR-F1HD [XDR Guy Modified], Dennon TU-1500RD, Sangean HDT-1X, Ray Dees RDS Decoders, Korner 9.2 Antenna, FM-6 Antenna, Kitz Technologies KT-501 Pre-amps, Quantum Phaser, Wellbrook ALA1530 Loop, Wellbrook Flag, Clifton Labs Active Whip. 

“Nothing but blues and Elvis, and somebody else’s favorite song…” 


Re: C.Crane Skywave Vs. XHDATA D-808... 1 kHz DSP Audio Shootout

Gary DeBock
 

Thanks to all who have provided their opinion on the choice of 1 kHz DSP audio between the CC Skywave and XHDATA D-808 portables. Because the "voting" was done in two different Group.io sites (IRCA and Ultralight), for those interested, the final "score" was 5 in favor of the CC Skywave (Steve, Jim, Nick, Craig and yours truly) and 3 in favor of the XHDATA D-808 (Dave, Gord and Michael). The close voting confirms that these two portables have roughly similar performance in this aspect.

In the "extreme sport" of all-out transoceanic DXing with inexpensive portables, the odds are stacked against you, and you need every possible advantage from your modest radio and antenna. In a place like the Pacific Northwest there is strong domestic splatter next to almost every transoceanic DX frequency, and without effective 1 kHz DSP filtering (despite its "muffled" audio side effects) you are pretty much out of luck in chasing anything more than the "big gun" Asians. You are pretty much "stuck" in the 1 kHz DSP setting if you want to try out this "extreme sport," and also "stuck" with the audio that your portable provides in this setting. As such, you need to choose the radio that provides the best possible audio in an actual weak-signal transoceanic DXing situation-- which is why I set up this real-world comparison using the somewhat dicey 837-Harbin signal. Thanks again to all who participated!

73 and Good DX,
Gary DeBock (in Puyallup, WA, USA
     

   


Re: C.Crane Skywave Vs. XHDATA D-808... 1 kHz DSP Audio Shootout

Michael.2E0IHW
 

Not much between them, but adjacent QRM appears
slightly less intrusive on the
XHDATA D-808.

But I'd be happy if Santa delivered either...

Michael UK




Re: C.Crane Skywave Vs. XHDATA D-808... 1 kHz DSP Audio Shootout

Gord Seifert
 


   I have to agree with Dave Echelman, and for exactly the same reasons. The hash seems less intrusive on the 808 and it seems more stable. But my opinion it is probably based mainly on personal preference regarding the sound rather than intelligibility. I could not make out anything at all in either clip though. But then I have very little experience listening to signals that close to the noise and in a language I can't understand to begin with.  

  Regards,
  Gord


Re: C.Crane Skywave Vs. XHDATA D-808... 1 kHz DSP Audio Shootout

Gary DeBock
 

Thanks Dave and Jim for your comments,

So now the "score" is 3 to 1 for the Skywave, after adding the preferences of Steve R. and myself (who had kept silent until now). My own comments to Steve were:

<<<   So, which do you prefer?   >>>
 
I prefer the Skywave, just like you. 
 
Although neither portable will ever win any audio awards, the 1 kHz DSP audio in the Skywave seems slightly better balanced between treble and bass, which makes intelligibility and copying easier. As you probably already know, switching to a wider DSP setting for better audio doesn't really work here in the Pacific Northwest, because there is almost always a loud domestic station ready to splatter all over your weak DX if you try it. So we find ourselves pretty much stuck in the 1 kHz DSP setting for serious transoceanic DXing, when using these portables.
 
73, Gary      
 


Re: C.Crane Skywave Vs. XHDATA D-808... 1 kHz DSP Audio Shootout

Jim Townley
 

Hi Gary, 
I thought the audio was more intelligible on the Skywave. I didn’t hear as much splatter with the Skywave. Toward the end of the recording, the splatter was more clear and pronounced on the 808. 

Jim T


Re: C.Crane Skywave Vs. XHDATA D-808... 1 kHz DSP Audio Shootout

daiche
 

Hi Gary, great comparison!

To me the D-808 wins. I think the Skywave has a bit 'sharper' sound, but there is more noise getting thru the filter and in certain types of fading, the Skywave has an almost raspy, hissy sound for short intervals. The D-808 sounds a bit more muffled, but steadier, with less noise getting thru the filter.....

I think both radios are great for portables, as is the Satellit Elite. The Sat doesn't have a 1Khz filter, but it pretty much matches the E5/G5/1103 in performance, as long as RF levels don't get high enough to mute it, which happens here in Grants Pass during the daytime. Those three are my current digital favorites. BTW, I think the Sangean DT-800 is a great radio for it's size too, with a good narrow bandwidth and no muting.

Dave Aichelman     N7NZH     Grants Pass, Oregon

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