Date   

Re: Mid day Quick shoot out-FARMERIK

keith beesley
 

Thanks Farmerik, that's useful information :-)


Keith B. 
Seattle WA 


Re: Construction: how to shield CPU noise?

Guy Atkins
 

I added some shielding recently between the boards of the C. Crane Skywave radio, and have made similar additions to other portables before. My usual approach is to target the DSP chip first of all, and DC-DC converters or display driver chips if I can identify them.

Sometimes the extra screening works best if it is floating (not connected to a ground point), but usually grounding the shield is the way to go.

Construction-wise, I like to make up a sandwich of thin tin sheet metal with clear plastic tape on opposite sides for insulation. For the Skywave radio I didn't have any more tin sheet metal around so I used a layer of aluminum foil with the tape on both sides. Because I couldn't solder to the aluminum, I made a mechanical connection of a short length of wire under the tape, and then routed the wire to a ground point on the Skywave.

I'm not sure I noticed any noise level improvements with the Skywave, but I felt better knowing I'd added more extensive coverage than the minimal stock shielding. With other radios the improvement has sometimes been dramatic.

73,

Guy Atkins
Puyallup, WA


Construction: how to shield CPU noise?

m_a_schuster
 

I'm not talking about noise from a nearby computer. I'm referring to hash generated by the radio itself, which then finds its way into the audio output.

 

Rare on Tecsun radios, I've seen it with cheaper brands but most especially with Degen models. Also Kchibo. Why some brands/models handle it well, and others not, is a mystery to me.

 

Sometimes it can't be fixed easily. The Ccrane pocket radio suffers from it. Their solution: add a button to turn of the display. Hmm. Well, it works.

 

Case in point: the Degen DE-11 (Kaito KA-11), an aging, tiny little PLL multiband styled like previous better-made Sony models. All of MW, and a good portion of SW, is drowned out by buzzing unless you have an S9 signal.

 

If one would attempt to add a shield, where would you start? At the source (CPU? display driver chip? how to identify) or the target? Any generic pointers from someone who has successfully tackked this kind of thing.


Mid day Quick shoot out-FARMERIK

Rik
 

Just a 'quick' AM scan comparison from the same spot in my radio room with the radios held in the same direction just to be fair. All 'understandable' stations counted, which is subjective. I did not take the time to slowly  turn 90 degrees on each frequency  and get more stations. Testing both analog and digitally tuned radios would have been hard not to miss some without taking hours to complete the test when band conditions might have changed. This took about 1.5 hours 11:30 AM to 1:00 PM local time Mon 26 Oct 2015.

PL-600=32
PL-310ET auto scan=16
CC Pocket=13
SONY ICF-M260=32
SONY ICR-P15=25
SONY ICF-P26=40


Just to describe the SONY models-


ICF-M260 On the market for years, digital. Selectivity not good as strong stations can be heard 10 KHz away. I was surprised how well it did. It is just about the max size for an ULR. Around $40


ICR-P15 acts completely analog, AM band only, sold in Japan for at least a few years and some times seen on eBay around $30 Shirt pocket size well under 20 CID.


ICF-P26 This is a new model sold in Europe and Asia and listed on SONY USA. eBay under $25.


-FARMERIK


Puyallup, WA Ultralight TP's for 10-26

Gary DeBock
 

As reported from Victoria there were some moderately interesting Asian signals this morning, with better variety than over the weekend. The mid-band Chinese stations on 1017, 1035 and 1044 made weak appearances here around 1330 while the usual NHK big guns struggled somewhat to get out of the noise. Like in Victoria 1575-VOA was the star of the session, reaching fair to good levels both in the predawn darkness and after daybreak.
 
The multiple CNR1 stations on 1035 managed a fair, warbling carrier at my 1320 start time, and came up to poor audio (with their typical echoes) shortly thereafter. About the same time both a presumed 1017-CRI and 1044-CRI managed threshold audio, but neither stuck around for more than a few seconds at a time. 972-HLCA, 1566-HLAZ and 1575-VOA all had good peaks in and out during this predawn darkness, but the Japanese big guns were unusually subdued. A moderate sunrise enhancement around 1410 brought 603-HLSA out of the noise to reach a temporary fair level, while the mid-band Chinese stations sunk back into the noise. 594-JOAK and 747-JOIB joined 972-HLCA and 1575-VOA with fair to good audio peaks around 1415 while a presumed 738-BEL2 and 1134-JOQR came out of the noise to reach brief threshold audio. That was pretty much the story of the session, with several weak Asians providing more variety but no really strong TP stations showing up anywhere on the band.
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
7.5" loopstick C.Crane Skywave Ultralight +
15" FSL antenna
 


Re: Sony ICF-P26

Lee
 

Thanks Farmerik... I also have the SRF-S84 Megabass..great little walkman
Also have the Eton G8 Traveller II.. Eton G3 Globe Traveler.. Tecsun PL-380
and Tecsun PL-600... the Eton G8 is with the rubber feel case is feeling rather
sticky case now, I will try using wet-wipes tissues to clean it... Yeuuch !!!

Lee...G6ZSG.

------------------------------------------------------------------------

farmerik
Oct 25 7:57 PM
Tunes and behaves differently than the SRF59. Probably competitive with it, but I no longer have the walkmen here to compare. It is close enough so it would take quite a bit of time DXing to compare them. I could do additional day time station counts, besides the PL-310 and R9012, but I have no idea what other radios people are interested in, and I don't have all that many.  I should have an ETON Traveler III here, but haven't seen it  lately.

I spent hours DXing with the SONY ICF-S22 and never heard any interest it that after I posted results here. I'd be glad to do a station count though. Just ask if I have the radio you have. - FARMERIK


Re: ETON Traveler III MISS tuning- FARMERIK

mediumwavedx
 

Hi FARMERIK,

Mine does the same thing. It's annoying. I have heard of others having the same problem. Seems to be the nature of the beast.

It's a beautifully made radio otherwise. They really skimped on the tuning encoder. I expect it will fail totally in short order.

Bill



ETON Traveler III MISS tuning- FARMERIK

Rik
 

My ETON Trav III miss tunes either by skipping steps or not responding to turning the knob, and sometimes changing step after I have stopped turning the knob. Could either compressed air or DeOxit help? Or is it hopeless? - FARMERIK



Re: Hot Rodding the C Crane Skywave

Rik
 

Thanks for the excellent article. Let us know how it DXes tuning your crate loops. - FARMERIK


Re: Sony ICF-P26

Rik
 

Tunes and behaves differently than the SRF59. Probably competitive with it, but I no longer have the walkmen here to compare. It is close enough so it would take quite a bit of time DXing to compare them. I could do additional day time station counts, besides the PL-310 and R9012, but I have no idea what other radios people are interested in, and I don't have all that many.  I should have an ETON Traveler III here, but haven't seen it  lately.

I spent hours DXing with the SONY ICF-S22 and never heard any interest it that after I posted results here. I'd be glad to do a station count though. Just ask if I have the radio you have. - FARMERIK


Re: Sony ICF-P26

Lee
 

Anyone find out if it`s processed like the SRF59 et al ???

Lee... G6ZSG


Puyallup, WA Ultralight TP's for 10-25

Gary DeBock
 

Thanks to Colin and Nigel for their earlier reports. Unfortunately there was no dramatic improvement in Asian signal strength this morning (at least not at this mediocre location). Some promising signals around 1310 took a swoon by 1330, and a lackluster sunrise enhancement brought up very few second tier TP's.
 
In the total darkness at 1310 both the 1053-Jammer and 1566-HLAZ were managing fair to good signals, along with fair audio from the Japanese big guns and the somewhat unusual 558-HLQH. These all took a dive by 1330, with very little Asian audio across the band. Around 1400 the Japanese on 594 and 747 came back up to fair strength, while 603 came out of the noise with a weak mix of China and HLSA around 1405. 657-Pyongyang also managed threshold audio around the same time, while 738-Tahiti (a sure sign of substandard Asian conditions here) confirmed the dreary propagation with weak audio at 1430. Late on in the session around 1435 both 1575-VOA and 1593-CNR1 came out of the noise to manage ghostly audio, but bailed very quickly after that. Overall the session was pretty lackluster, and fairly typical of the dreary propagation during this lean solar year. Hopefully the group at Rockwork had much better Asian results than this mediocre location provided, but I'm not very optimistic about that.
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
7.5" loopstick C.Crane Skywave Ultralight +
15" FSL antenna
 


Re: Hot Rodding the C Crane Skywave

jcfontario
 

Nice article, Chuck.
 
I picked up a Skywave, mainly for travel to Europe, however, hotel rooms there are extremely noisy with BPL and general QRM, so having the ability to throw a wire out the window might be useful.
 
Alas, my soldering skills are in such a sad state that I might end up being a customer for a second radio after I mis-soldered the first one!
 
It does give me hope though............
 
John Fisher,
Kingston, ON

Sent: Saturday, October 24, 2015 2:54 PM
Subject: [ultralightdx] Hot Rodding the C Crane Skywave

 

Hi all.  This morning was devoted to "Hot Rodding" my C Crane Skywave by adding an input for an external medium wave antenna.  Aimed primarily at accommodating the addition of a loop, the capability of the varactor in Si4734 DSP chip to tune a loop is taken advantage of.

I'll upload it after posting this message so I expect everyone wil get the notice.

Best
Chuck Rippel
Chesapeake, VA



New file uploaded to ultralightdx

ultralightdx@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the ultralightdx
group.


File : /6 Alignment & Modification/HtRodding Skywave.pdf
Uploaded by : chuck_rippel <lantareamon@...>
Description : Overview of adding an external MW antenna input to the C Crane Skywave ULR.


You can access this file at the URL:
https://groups.yahoo.com/neo/groups/ultralightdx/files/6%20Alignment%20%26%20Modification/HtRodding%20Skywave.pdf


To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398


Regards,


chuck_rippel <lantareamon@...>


Hot Rodding the C Crane Skywave

K8HU and ex-NMN
 

Hi all.  This morning was devoted to "Hot Rodding" my C Crane Skywave by adding an input for an external medium wave antenna.  Aimed primarily at accommodating the addition of a loop, the capability of the varactor in Si4734 DSP chip to tune a loop is taken advantage of.

I'll upload it after posting this message so I expect everyone wil get the notice.

Best
Chuck Rippel
Chesapeake, VA



Puyallup, WA Ultralight TP's for 10-24

Gary DeBock
 

Here in Puyallup it was also a clunker session for sure, with all the Asian big guns except for 1566-HLAZ turning their nose up at the lackluster propagation. 
 
The meager signals that showed up were all from Korea and Thailand, the best of which was from 1566 during its Japanese service at 1335 (fair to good). 558-HLQH also managed a few gasps past the 560 splatter around 1405, and ghostly audio from both 603-HLSA and 657-Pyongyang surfaced around 1425. Finally,1575-VOA also managed fair audio at 1438 for about 5 minutes, but that was about it. Even the Japanese big guns took the day off (like we should have done).
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
7.5" loopstick C.Crane Skywave Ultralight +
15" FSL antenna
 
 


Re: Anyone heard of a Kaito KA268? -FARMERIK

Rik
 

I was never able to find too much, but I do think it is a new model. Now there are two brief 'reviews' on Amazon. One sounds like it may be connected to the seller, Kaito USA and the other is pretty vague. I't's only $20 + $7 shipping, in the price range of the R9012, but larger than a ULR powered by 4 AA cells. So I ordered one today. I am hoping for a cheap radio to listen to SW in the car while my wife is shopping.

Amazon.com: Kaito KA268 12 Band World Receiver with AM/FM and 10 Shortwave Bands 3.8 Mhz - 22Mhz: Electronics

 


Puyallp, WA UltralightTP's for 10-23

Gary DeBock
 

For once Victoria and Puyallup were in full agreement as the below average season produced another below average session. With the exception of the Japanese and Korean big guns TP signals were going against the grain, and those that did manage to show up lacked any energy.
 
In the predawn darkness at 1310 the NHK big guns and 1566-HLAZ were all fairly strong, and 972-HLCA, the 1053-Jammer and 1566-HLAZ were having their moments of fair audio. Unfortunately things pretty much stayed this way throughout the session, with very little else showing up during a lackluster sunrise enhancement. Around 1400 there were weak gasps of audio from a presumed 603-HLSA, 657-Pyongyang and a presumed 738-BEL2, none of which could stick around for more than a few seconds. 1134-JOQR, 1503-JOUK and 1575-VOA also reached threshold levels in and out during a dreary sunrise enhancement, but bailed very quickly whenever investigated. Only 594, 693 and 774 reached very good levels, although even these big guns weren't as strong as yesterday. Altogether it was another very forgettable session in a pretty lackluster October.
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
7.5" loopstick C.Crane Skywave Ultralight +
15" FSL antenna
 


Puyallup, WA Ultraight TP's for 10-22

Gary DeBock
 

The dreary reports from Victoria this morning were kind of puzzling, with the Asians sounding about average here this morning (for this below average season, that is). A fairly good sunrise enhancement boost at 1400 brought the usual Japanese big guns and 972-HLCA up to respectable levels, along with weak audio from 558-HLQH, 603-HLSA, 657-Pyongyang and 1134-JOQR. 972-HLCA even had several S9+ peaks, reaching its best level of the season here so far.
  
At my 1310 start time the band was bizarre indeed, with 1323-CRI the only Asian with decent audio (and that at a fair to good level, no less, with its Russian service). Unfortunately the gear wasn't set up yet in the back yard for a recording. The Japanese big guns and 972-HLCA had several fair to good peaks during the predawn darkness, along with weaker audio from 1053, 1134 (JOQR) and 1566. Just before 1400 the Japanese big guns and 972-HLCA began to get a serious boost, with 972 pounding in at S9+ levels between 1420 and 1430 with its variety program. Second-tier TP's on 558, 603 (HLSA), 657 and 1134 (JOQR) weren't nearly as strong, but did make weak appearances in and out of the noise before bailing around 1430.The big guns on 594, 693 and 972 stuck it out much later, though, with 594 and 972 both maintaining weak audio here as late as 1450 (unprecedented this month, for this mediocre location). Overall the session was fairly average, but kind of bizarre considering the lackluster reports from Victoria.
 
972  HLCA   Korean female speech at S9+ level during variety program at 1416
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
7.5" loopstick C.Crane Skywave Ultralight +
15" FSL antenna
 


Puyallup, WA Ultralight TP's for 10-21

Gary DeBock
 

A dreary band in the predawn darkness was rescued somewhat by a potent sunrise enhancement boost after 1400, bringing the usual Japanese and Korean big guns up to respectable levels, and several second-tier Asians out of the noise.
 
Around 1305 the Asians were anemic indeed, with only 1566-HLAZ managing fair audio in and out. During the predawn darkness all the NHK big guns seemed to be struggling to get out of the noise, and the Koreans on 972 and 1053 were missing in action. Things began to improve dramatically around 1400 when the Japanese on 594, 693, 747, 774 and 828 came out of the noise to reach fair to good levels in and out, while the Koreans on 972 and 1053 got a serious boost. Around 1405 both 603-China (with weak male-female Chinese speech, all alone without HLSA) and 657-Pyongyang managed fair audio peaks, while a presumed 1134-KBS also came out of the noise with variety show programming sounding like 972. Although the Japanese big guns followed Nick's script by staying at relatively modest levels 972-HLCA became pretty strong, with Korean female speech temporarily hitting a very good level around 1410. Neither 603-China nor 657-Pyongyang could hold their fair strength for any length of time, though, and sunk into the noise around 1420. The Japanese big guns also bailed shortly thereafter, but 972-HLCA was still in audio as late as 1445 here-- pretty much unprecedented for this mediocre location so far this season. Overall the session was moderately interesting because of the dramatic sunrise enhancement boost-- which turned a clunker band into something pretty decent.
      
972  HLCA   Dangjin, S. Korea   Korean female speech at very good level at 1410
https://app.box.com/s/8t8k0ve0pa11fmfjnk4gsg76ohauzfpc  
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
7.5" loopstick C.Crane Skywave Ultralight +
15" FSL antenna
 
 

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