Date   

Marathon Ultralight Radio Track Down of 362-WK (25 watts at 11,017 km)

Gary DeBock
 

If anyone ever wondered why a DXer would want to set up on the side of a plunging ocean cliff at 0500 local time and go all-out to track down "impossible" transoceanic DX on "hopelessly" humble gear, the Rockwork ocean cliff on the Oregon state coast delivered a perfect example on August 13th-- the last day of my DXpedition with Tom Rothlisberger.

The Longwave NDB-DXing hobby is based on advanced SDR receivers and state-of-the-art filters, which can track down and isolate extremely weak NDB's at long range when assisted by large broadband loop antennas. On the other hand the Ultralight Radio NDB-DXing hobby is based on a cheap, AM-mode-only $50 pocket radio, which gets somewhat of a boost from a 12 inch (30cm) diameter Longwave FSL antenna if a live DXer is lucky enough to track down a long range beacon during good propagation while stuck in the AM mode (with a wimpy DSP filter, which allows reception of anything within 3 kHz). So why does this wacky hobby exist? Because of the supreme challenge of tracking down any long range Trans-Equatorial NDB's with such basic gear, and the supreme feeling of accomplishment when you beat all the odds and score a rare success.    

On August 13th the South Pacific longwave propagation was exceptional at the cliff, and I knew I had a fighting chance to score some choice DX with the Ultralight + FSL combo. I had uploaded a list of Tom's record-breaking 2019 South Pacific NDB results into my phone, and during peak propagation the New Zealand and Cook Island beacons seemed to be scoring big, while others were MIA. The 50 watt flea-powered New Zealand beacon 366-SF in Springfield had just made a return appearance at a weak level (after 8-8) at 6,822 miles (10,977 km). So why not push my luck for all it's worth and go after a 25 watt beacon in the same area-- 362-WK in Whakatane? (6,846 miles/ 11,017 km)

On 362 kHz there was indeed some weak Morse code from the South Pacific, but even after 2 minutes I still couldn't be completely sure of the call letters in the wickedly noisy ocean cliff environment. The signal seemed to tank just when I had identified a "W," and I thought my chances might be toast. But the weak signal came back gradually, and while going through this marathon I thought to myself, "WK must stand for "weak!" But finally there was a boost in signal strength, and I could clearly make out the "WK" signal identification after the thrilling 3 minute marathon (which was fully recorded, and is posted at the following link for those who wish to relive the excitement of the ultimate live DXing challenge without the ocean cliff's 18-wheeler noise, which made it much more difficult at the time)  https://dreamcrafts.box.com/s/xjhugy27gzmza3zdjdw3hyrszr9lf4qk

25 watts at 6,846 miles-- I almost felt like jumping into the Pacific for joy!

Gary DeBock (DXing at the Rockwork ocean cliff near Manzanita, OR, USA)
7.5inch loopstick Tecsun PL-380 Ultralight + 12 inch Longwave FSL

 


Re: Review - Digitech AR-1780 Multi-band Radio Receiver - battery choice

Phil Pasteur
 

Great resource. Thanks.
I did not see how the batteries are verified, but it seems they must quote test results as the numbers seem very specific.


Re: Review - Digitech AR-1780 Multi-band Radio Receiver - battery choice

Michael Schuster
 

Here is a quick guide of verified cells from a flashlight expert:

http://batteries.parametrek.com/index.html?size=18650


August 2020 Rockwork Cliff DXpedition Video

Gary DeBock
 

Take a break from the wacky Pandemic and escape with Tom Rothlisberger and me to a wild, plunging cliff on the Oregon coast-- 500 feet (150m) straight down to the Pacific.

Shot right in the middle of an intense South Pacific DU-DXing session Monday morning at 1316 UTC, the video features the usual overcrowded conditions with squatters, 18-wheelers and tight real estate-- not to mention Tom's record-breaking broadband loop and 5 of my FSL antennas on PVC bases-- all crammed into any remaining space. Ocean scenery was awesome just after sunrise from our highly elevated perch, but my focus was on three of the all-new design 8 inch (20 cm) Medium Wave FSL antennas, designed to replace the 15" and 17" monster FSL's. The new 9.5 lb. wonders have provided ALL of the AM-DX recordings posted during this trip, proving that you can have awesome FSL-based DXpedition fun without having to go through a weightlifter training course. The 7.5" loopstick CC Skywave and XHDATA D-808 portables are also featured in their actual DXing setup modes, and my partner Tom makes a brief appearance, in full agreement with my assessment that we wouldn't trade this wild place for anywhere else in the world!  https://www.youtube.com/watch?v=Ea0oEWlC6UM&feature=youtu.be

Gary DeBock (DXing with Tom Rothlisberger at the Rockwork 4 Ocean Cliff near Manzanita, OR, USA)


Re: Review - Digitech AR-1780 Multi-band Radio Receiver - battery choice

Paul S. in CT
 

Wow, over 20 replies... I'd like to chime in, now that a few things are brought to the front.
1.) Some Chinese battery lables are in mWhr, not mAhr. Thus the claim of "9900 mA hr" when divided by the 3.7V battery specification is about 2700mA hr.
2.) I will agree to the opinion that there are "genuine" batteries, because there are "knock-offs" of dubious, if not poor quality disguised as high quality.
3.) Even the "genuine" batteries are a little over-rated. Subtract 300mA hr from the claim as a general rule.
So, if the battery is 3000mAhr, figure it as 2700 mAhr, and divide by 60ma... this means 45 hrs, and at 100ma its 27 hrs. Thats what I would expect of a Genuine battery.

Therefore, I submit the following point #4... TOSS the supplied battery and get a "genuine" one. Also one final point #5... buy a reputable charger NiteCore or LiIto Kala. DO NOT use the radio to charge the battery.

Now having said all this I snoop around candlepowerforums dot com, and post a link to quality measurements at
https://lygte-info.dk/review/batteries2012/Common18650IndividualTest%20UK.html
that goes through MANY manufaturers over the last 8 years. This is a good heads-up IMHO and worth the time. One can also check different sized batteries such as the newer 26650 or 21700 sizes. Those of us that like to tinker, might hard-wire a different size battery at the cost of a battery door.

At the extreme, test the radio with 2 AA cells as 3 volts. If the radio works, it will probably cut-off at 2.5 Volts (the usual cutoff for Li-Ion batteries). So, no harm there. If true, a safer LiFePO4 (lithium-Iron-Phosphate or IFR type) battery can substitute and there are some REALLY GOOD ones, again at the expense of the battery door.

Regards and stay safe
Paul S. in CT FN31nl


Re: Review - Digitech AR-1780 Multi-band Radio Receiver - battery choice

Phil Pasteur
 

I have used these folks. Even called and talked to the owner. He sources his batteries directly from Japan. He also does verification testing.
I have bought at least 60 batteries from them and never been disappointed.
Not sure about international shipping...

https://www.orbtronic.com/


Re: Review - Digitech AR-1780 Multi-band Radio Receiver - battery choice

Gord Seifert
 


     Well, if you don't buy off eBay or Amazon, where do you buy them?


Re: Review - Digitech AR-1780 Multi-band Radio Receiver - battery choice

Michael Schuster
 

Perhaps the most knowledgeable folks regarding cylindrical Li-Ion batteries, and 18650's in particular (because of their enduring popularity starting as components of computer battery packs) are the flashlight enthusiasts. To paraphrase the common wisdom:

  • Stick to brand names (Panasonic, LG, Samsung, Nitecore, KeepPower, Sony, Fenix, Aspire, Efest, etc)
  • Don't buy off eBay or Amazon as there are too many fakes
  • Don't buy any battery or charger having "Fire" in its brand name


Re: 558-6WA Received on an 8 inch FSL at Rockwork (9,153 miles)

Jerry Rappel
 

Always a great report Gary,

Jerry WW0E

On Sun, Aug 9, 2020 at 9:33 PM Gary DeBock via groups.io <D1028Gary=aol.com@groups.io> wrote:
Australian stations kicked into high gear at the plunging Rockwork cliff this morning as 558-6WA in Wagin, Western Australia managed a pretty decent signal on a new-design 8 inch (20cm) FSL antennas (design photo attached) at 1328 UTC.

The ABC "Nightlife" program features the female host Indira Naidoo interviewing a lady named Karen concerning the gold mine riots in New South Wales in 1861, with the full 4 hour Podcast (very temporarily) posted at https://www.abc.net.au/radio/programs/nightlife/nightlife/12517014

The phrase "November of 1860" is spoken by the interviewee Karen at 1:52 in the radio recording of 6WA posted at https://dreamcrafts.box.com/s/h66frtuns42ykkpvw27ck2no3u22dtb5
The same "November of 1860" phrase is spoken by Karen at :59 in the ABC Podcast segment (at somewhat stronger strength) posted at https://dreamcrafts.box.com/s/bd7cnf7fpzj9ddbx0gdio6y5w361xjli

For those needing to use the ABC website to confirm an Australian reception, you should be aware that ABC has drastically reduced the time that these Podcasts are posted, so you need to track them down ASAP!

73 and Good DX,
Gary DeBock (DXing with Tom at the Rockwork 4 Ocean Cliff near Manzanita, OR, USA)


558-6WA Received on an 8 inch FSL at Rockwork (9,153 miles)

Gary DeBock
 

Australian stations kicked into high gear at the plunging Rockwork cliff this morning as 558-6WA in Wagin, Western Australia managed a pretty decent signal on a new-design 8 inch (20cm) FSL antennas (design photo attached) at 1328 UTC.

The ABC "Nightlife" program features the female host Indira Naidoo interviewing a lady named Karen concerning the gold mine riots in New South Wales in 1861, with the full 4 hour Podcast (very temporarily) posted at https://www.abc.net.au/radio/programs/nightlife/nightlife/12517014

The phrase "November of 1860" is spoken by the interviewee Karen at 1:52 in the radio recording of 6WA posted at https://dreamcrafts.box.com/s/h66frtuns42ykkpvw27ck2no3u22dtb5
The same "November of 1860" phrase is spoken by Karen at :59 in the ABC Podcast segment (at somewhat stronger strength) posted at https://dreamcrafts.box.com/s/bd7cnf7fpzj9ddbx0gdio6y5w361xjli

For those needing to use the ABC website to confirm an Australian reception, you should be aware that ABC has drastically reduced the time that these Podcasts are posted, so you need to track them down ASAP!

73 and Good DX,
Gary DeBock (DXing with Tom at the Rockwork 4 Ocean Cliff near Manzanita, OR, USA)


Antenna Hi Q Compensation -- Audio Bandwidth Fidelity Reprocessing

Alex P
 

I have read with interest the recent posts regarding Hi Q FSL results.

Of note is the very high Q and degradation of audio intelligibility as a result of the resulting audio bandwidth reduction.

Comments have been made that audio processing / reprocessing can, will or may be used to recover the audio intelligibility.

My question:  What audio processing / software is available to recover the loss of frequencies  and bandwidth intelligibility due to the Hi Q bandwidth reduction of antennas?    

TIA

Alex


Re: Review - Digitech AR-1780 Multi-band Radio Receiver - battery choice

Powell
 

On You Tube a person tested these batteries.  The Chinese ones failed. The Japanese ones did well. 

Powell 


Re: 18650 battery test in Xhdata D-808 radio

Max Italy
 

@ Rémi Friess the battery in my D-808 is Xhdata branded 2000mA

https://i.imgur.com/rFpmUrb.jpg

@ Kenny Murray i use vaping gear and i have a lot of 18650 batteries but keep in mind that most vaping gear (if not all) use flat-top batteries while you need button-top.
Flat-top batteries are shorter and you can adapt them using one of those Neodymium magnets sold on ebay or aliexpress , see  https://www.ebay.co.uk/itm/321296194078 or https://www.aliexpress.com/item/32792488474.html

The good point is that vaping gear draw a lot of current and use batteries rated 25A minimum; most are rated 35A. You do not need high current batteries for your radio, you need high capacity, however you can be sure that  if the battery is good for vaping it is good quality (still need the magnet extension) or it will not work at all.

In "normal times" quality batteries can be purchased online for less than $3 each from China including shipping but nowadays with Covid-19 most sellers apply huge shipping charges.
I use these for my vaping gear https://www.aliexpress.com/item/32821524948.html  and they are as good as the famous brands.

 

 

 


Re: 18650 battery test in Xhdata D-808 radio

Kenny Murray
 

I avoided using the 18650's because the radio i choose was the tecsunpl365 and uses aa batteries. i use 3 aa duracell 2500mah batteries.. no complaints with anything...

having said this.. research with rc models.. portable radios. ect..

avoid the belief of over ratings of many products such as 18650 batteries.

what is good is this.. the ones from LG and the pnes from panasonic..

simple place to get them.. go to a smoke shop.. they sell them to use in smoking vaporizors.

i have a countycom gp5ssb.. i use aa batteries.. as duracell.. nimh

* i was previous use many batteries of energizer.. and i sopped doing so.. they are not good batteries any more and warranty for such products is very poor.. i used 8 in an avation radio.. cycled maby 12 times over 4 years.. occasional standby usage.. there was defects in 2 of the batteries.. two sets of 4.. a cost of 50$.. energizer offered 5$ coupon. waste of time..

ask anyone who has a vape unit.. what is the best battery..

thats your answer for your radio.. rc toy.. laptop rebuild. HT radio pack..

they will tell you LG and panasonic.. as for the specific brand.. they have the battery in the sales at the smoke store.. the one that sells vape items..

it is a vape battery you want.. it is the same as your radio..




best wishes..


======================== Kenneth J. Murray VO1KJM EM: murraykj709@... Telephone: 506-962-8401 ======================== Inmarsat: AOR WEST: 011-870-76-4156467 ============================================================================= Confidentiality : This message is intended only for the use of the individual or entity to which it is adressed and may contain information which is confidential and privileged. Confidentiality and privilege are not lost by this email having been sent to the wrong person. If you are not the intended recipient or the person responsible to deliver it to the intended recipient, please notify us by email and delete this document immediately. Any distribution, reproduction or other of this email by unintended recipient is prohibited.


On Sunday, August 2, 2020, 9:37:37 AM ADT, radiojayallen <radiojayallen@...> wrote:


I've been interested in reading about people's varying experiences with battery life on this radio. Since I had never noticed a problem with battery life on my XHDATA D-808 with its original battery compared with other rechargeable radios (although it is one of many radios I regularly use in rotation so it's hard to judge), I am running an informal real-world test.

I charged the radio, then started using it for two hours a day on AM at medium volume with the light off. So far I have completed two weeks (14 days) which would amount to approximately 28 hours and although the battery meter initially drops rapidly it is still showing 2 bars. I will report total hours when it finally shuts off, but it seems clear that people are having vastly different results. Of course if I were playing it more loudly it would have certainly been depleted by now so there is a bit of subjectivity to this. But at least compared to other radios with internal rechargeable batteries the D-808 with it stock battery seems fine.

FWIW.

Jay


Re: 18650 battery test in Xhdata D-808 radio

Mark Roberts
 

I have two D-808's and they show somewhat different results. It's true that they now have different batteries as well, but the radios behaved differently even when they had the same type of battery.

The two D-808's came from the same Israeli reseller, about a couple of months apart.

There are so many variations possible that it seems challenging to design a good experiment that would help clear the matter up.

I just got a Tecsun ICR-110, which uses the same kind of battery, possibly to power a 3-watt amplifier (very beefy sound on this one, not like the other Tecsuns I've had). The charge indicator is very different from other radios I've had. It will be interesting to see how long its battery lasts in service.


Re: How best to inexpensively clean degraded variable caps?

Ron Layton
 

I'm a disabled veteran and funds are very tight. I can't really afford De-Oxit but, I have found a viable alternative. I use CRC QD Electronic Cleaner and it works just fine. I have used it to clean recycled variable caps from old radios as well as normal use such as sticky and scratchy switches and pots. I think I paid around $4 for an 11 ounce can not too long ago.
73's
Ron


Re: 18650 battery test in Xhdata D-808 radio

radiojayallen
 

Mine is an XHDATA labelled cell rated at 2000 mAh.


Re: 18650 battery test in Xhdata D-808 radio

Rémy Friess
 

What sort of battery is it?

My D-808 came with a 2000 mAh type. A friend of mine got a set with a 1600 mAh type, another with a 1200 mAh, and it seems some come with 3600 mAh batteries.

It seems they include the type of battery they can lay their hand on when dispatching the stuff.

Rémy.

Le 02/08/2020 à 14:37, radiojayallen a écrit :

I've been interested in reading about people's varying experiences with battery life on this radio. Since I had never noticed a problem with battery life on my XHDATA D-808 with its original battery compared with other rechargeable radios (although it is one of many radios I regularly use in rotation so it's hard to judge), I am running an informal real-world test.

I charged the radio, then started using it for two hours a day on AM at medium volume with the light off. So far I have completed two weeks (14 days) which would amount to approximately 28 hours and although the battery meter initially drops rapidly it is still showing 2 bars. I will report total hours when it finally shuts off, but it seems clear that people are having vastly different results. Of course if I were playing it more loudly it would have certainly been depleted by now so there is a bit of subjectivity to this. But at least compared to other radios with internal rechargeable batteries the D-808 with it stock battery seems fine.

FWIW.

Jay


Re: 18650 battery test in Xhdata D-808 radio

radiojayallen
 

I've been interested in reading about people's varying experiences with battery life on this radio. Since I had never noticed a problem with battery life on my XHDATA D-808 with its original battery compared with other rechargeable radios (although it is one of many radios I regularly use in rotation so it's hard to judge), I am running an informal real-world test.

I charged the radio, then started using it for two hours a day on AM at medium volume with the light off. So far I have completed two weeks (14 days) which would amount to approximately 28 hours and although the battery meter initially drops rapidly it is still showing 2 bars. I will report total hours when it finally shuts off, but it seems clear that people are having vastly different results. Of course if I were playing it more loudly it would have certainly been depleted by now so there is a bit of subjectivity to this. But at least compared to other radios with internal rechargeable batteries the D-808 with it stock battery seems fine.

FWIW.

Jay


Re: 18650 battery test in Xhdata D-808 radio

Phil Pasteur
 

Thanks for doing the testing Steve. It confirms what I have  experienced  with some of the specific batteries that you tested. It also confirms what I have  read and would have expected about the super rated Chinese cells.

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