Date   

Re: What do you class as 'DX"?

Andy ZL3AG
 

After having a wee think about this...

For AM - anything that you can't hear every night of the year.
For FM - anything that you can't hear 24/7/365.

Andy
CHCH NZ
Life Member, NZRDXL


Re: What do you class as 'DX"?

Paul Blundell
 

Thanks for the excellent reply.

I am focusing on the FM BCB and have been getting some interesting results. I need to spend more time logging what is "normal" to know what is abnormal. 

On Fri, Jul 19, 2019 at 5:41 AM Paul S. in CT via Groups.Io <ferrite61=yahoo.com@groups.io> wrote:
Rather tricky, and unique answers abound. Since you didn't post ANY information, there are two basic ways... by distance, or a formula that factors distance and TX power. Some folks think a 50kW station at 500km is NOT the same as 1kW at 500km. Thats why formulas abound. Theres a measure of sensitivity using a formula. But I would also state catching R. Australia in the North East USA is DX no matter what. (And I have using a barefoot Tecsun R911 and R9012, a distance of 16750 km 10400 mi)

Regardless of choice, the easy way by distance is to take the total number of receptions, divide by 19, then multiply by 3. Thats what "qualifies" by statistics as being outside of the main body of RX. So, the furthest 3/19 ths of all your RX is DX.

Regards
Paul S. in CT FN31nl





--
Paul


--
Paul - Moderator
UltralightDX


Re: What do you class as 'DX"?

Paul S. in CT
 

Rather tricky, and unique answers abound. Since you didn't post ANY information, there are two basic ways... by distance, or a formula that factors distance and TX power. Some folks think a 50kW station at 500km is NOT the same as 1kW at 500km. Thats why formulas abound. Theres a measure of sensitivity using a formula. But I would also state catching R. Australia in the North East USA is DX no matter what. (And I have using a barefoot Tecsun R911 and R9012, a distance of 16750 km 10400 mi)

Regardless of choice, the easy way by distance is to take the total number of receptions, divide by 19, then multiply by 3. Thats what "qualifies" by statistics as being outside of the main body of RX. So, the furthest 3/19 ths of all your RX is DX.

Regards
Paul S. in CT FN31nl


Re: What do you class as 'DX"?

Russ Edmunds
 

If a station is not commonly heard, it is DX.  Distance isn't a condition.



Russ Edmunds

WB2BJH

Blue Bell, PA

Grid FN20id


From: main@UltralightDX.groups.io <main@UltralightDX.groups.io> on behalf of Paul Blundell via Groups.Io <tanger32au@...>
Sent: Wednesday, July 17, 2019 8:59:14 PM
To: main@UltralightDX.groups.io
Subject: [UltralightDX] What do you class as 'DX"?
 
What is the measure / point that you use to class a signal as DX or not?




--
Paul - Moderator
UltralightDX


What do you class as 'DX"?

Paul Blundell
 

What is the measure / point that you use to class a signal as DX or not?




--
Paul - Moderator
UltralightDX


Portable Radio Go Case - July 2019

Paul Blundell
 


I have been looking for a way to carry my portable radio collection and my other ultralight related items. I have used a variety of bags and cases in the past.

I started searching both online and locally for a suitable case. Yesterday I was out doing some shopping when I called passed my local Super Cheap Auto. Here I found this case on special for $22, I decided to replace my previous case as I found it was not working as well as I would have liked and as it didn’t keep the radio the right way up it added the risk of the aerial breaking off.

Last night I had some spare time so I sat down and set up this case. I cut the included foam to fit my radios after doing a test run to ensure it will fit as I had planned.

Overall, I am very pleased with how well this case has come out, I am able to carry and store four radios plus log sheets, pens, notes, spare batteries and ear phones, everything I need for portable sessions. It is also small enough to fit in my back pack.
While this case was designed for ultralight DXing the same ideas could be used for amateur radio, radio scanning or any other storage need.

Photos can be seen here:https://tassieradiorxer.blogspot.com/2019/07/portable-radio-go-case-july-2019.html

--
Paul - Moderator
UltralightDX


April Hong Kong Ultralight DXpedition-- 774-1593 kHz Loggings & MP3's

Gary DeBock
 

     This is the final group of Hong Kong loggings and MP3 recording links, finishing out a list of over 100 DX stations and many additional recordings. Highlights in this group were the four long range DX stations received by shoving a 7.5 inch loopstick CC Skywave SSB Ultralight outside a security window in a 12th floor apartment around sunrise (1413-BBC in Oman, 1413-Vesti FM in Moldova, 1431-Radio Sawa in Djibouti (east Africa) and 1548-TWR in Moldova) and clear 918-RNK (Kampuchea) sign on and sign off messages (2200 and 1700 UTC, respectively).
     DXing in Hong Kong was a wild and wacky activity, with a "perfect storm" of overcrowded beaches, overcrowded frequencies, mystery languages and prolific RFI. The only way to make any real progress was to take advantage of the extreme portability of the "supercharged" Ultralight, and head for daytime DXing trips to Macau, and HK's awesome Cape D'Aguilar. That plunging cliff alone was enough to inspire any DXer, with numerous S9+ signals from Taiwan over hundred of miles in bright daylight.
    Special thanks is in order to my Japanese DXing buddies Satoshi Miyauchi and Hiroyuki Okamura, who gave me an "intelligence list" of long range DX targets in eastern Europe, Africa and the Middle East to try for. Nobody was more astonished than me when a 7.5 inch loopstick Ultralight successfully tracked down four of them! As always, any comments or corrections are most welcome.

774  UnID's-Taiwan   Two apparent Taiwan stations mixing together (one with Chinese music and the other with female speech in a Chinese dialect) during daytime DX at HK's Cape D'Aguilar at 0843 on 4-6, with some minor splatter from the 783 kHz local as well. With three Taiwan stations on the frequency and no apparent identity clues, these two will probably remain a mystery  https://dreamcrafts.box.com/s/wx4myuteuw223d3mkplje3whreq1r5ql

783   RTHK (5)   Golden Hill, Hong Kong   20 kW   Powerful local blaster with Cantonese Chinese opera at 1528 on 4-5  https://dreamcrafts.box.com/s/oxjyye1j4yz0lq72oyun8tu5s56sngkb

Female speech in Cantonese during daytime DXing at HK's Cape D'Aguilar at 0844 on 4-6; some Chinese opera music is in the background, but unclear if this is a co-channel (the 600 kW station 783-Voice of Strait is within daytime DX range at Fujian)  https://dreamcrafts.box.com/s/4l7loxnmzojif2ays5j9d29jw00vgsvf

792  UnID-Chinese  Mystery station at good strength with male Mandarin speech at 1630 on 4-6; this station failed to show up during daytime DXing in 783 splatter, so it could be either Taiwan or the Mainland (multiple possibilities)  https://dreamcrafts.box.com/s/21demzb0xlpf14is3vg9o7tkah8hdzjr

801  V.O. Kuanghua   Kuanyin, Taiwan   250 kW   Mainland-directed propaganda blaster with excellent signal during daytime DX at HK's Cape D'Aguilar at 0845 on 4-6; apparent radio drama in a Chinese dialect  https://dreamcrafts.box.com/s/t9d3402tiizs06cf9edjx4mxou37h8ez

810  Kuo Sheng BC   Changhua, Taiwan   10 kW   Another excellent Taiwan signal with female speech in Chinese dialect during daytime DX on HK's Cape D'Aguilar at 0847 on 4-6; this station had a strong presence day and night  https://dreamcrafts.box.com/s/gm2cwf4uwe23ah94vxgfqxgnsnex049c

810  UnID-China   Female Mandarin speech mixing with dominant music from Taiwan's Kuo Sheng BC at 2128 on 4-8; only heard once during sunrise DXing  https://dreamcrafts.box.com/s/b69ftfofe70yctmikp4rqogynois74w4

819  UnID-Taiwan   Weak male Mandarin speech during daytime DX at HK's Cape D'Aguilar at 0850 on 4-6; this sounds more like a news format from BCC than Cheng Sheng's typical Taiwanese  https://dreamcrafts.box.com/s/o62h3jkvng6h2x3xae4wb01z7rhucq2g

909  CNR6   Quanzhou, China   300 kW   Taiwan-directed classical music blaster dominant at 1656 on 4-6; wek co-channel underneath at times  https://dreamcrafts.box.com/s/s9478trdebt9911fiq2hrwfbw31ckf5u

909  UnID-Asian   Weak male-voiced speech and music under CNR6 at 1656 on 4-6; the music would indicate VoV as a good possibility  https://dreamcrafts.box.com/s/s9478trdebt9911fiq2hrwfbw31ckf5u

918  RNK   Phnom Penh, Kampuchea   600 kW   Far and away the dominant 918 station in Southeast Asia, with Shandong a poor second. Excellent recordings of both the 2200 sign on message and the 1700 sign off message were make in HK, with lots of S9 signals in between. This was the sign on message at 2200 on 4-8  https://dreamcrafts.box.com/s/wye9lgqn73xnhwc6krylj70wh9uv3dez

This was the S9 sign off message (with a new format National Anthem) at 1659 on 4-3, preceded by typical Kampuchean music  https://dreamcrafts.box.com/s/8f29q278jckhwlkx14d1pj7pphzropq7

Typical Kampuchean female vocal music at a strong level (over Shandong) at 1639 on 4-5  https://dreamcrafts.box.com/s/axpamu4xt5fjiq4znpznqxc1flht3fvk

Kampuchean female speech at S9 level over Shandong during HK waterfront DXing at 1301 on 4-7  https://dreamcrafts.box.com/s/vn5fokytck3qdt1yr2fmnj3zci1nzrcg

918   Shandong Synchros   China   Rarely competitive with RNK, one very brief moment of superior strength was at 1627 on 4-6  https://dreamcrafts.box.com/s/5kwmr6avvrnko64ijnchz915033c7ciz

The Shandong network synchros are not well coordinated, with the 5+1 pips at 1700 on 4-5 (from 5 seconds to 11 seconds in the recording) not in unison  https://dreamcrafts.box.com/s/8l8m69qada9jy5a7vk3bnqvdrn6q6eys

936  V.O. Han BC   Taoyuan, Taiwan   5 kW   Based on this network's programming on other frequencies, this is most likely the dominant male voice in a non-standard Chinese dialect at 2119 on 4-8  https://dreamcrafts.box.com/s/3z18uwfev8alhgs7ohob0cx83fkywlyh

936  UnID-Chinese   Female Mandarin speaker at a weak level under V.O. Han at 2119 on 4-8; most likely a Mainland station  https://dreamcrafts.box.com/s/3z18uwfev8alhgs7ohob0cx83fkywlyh

990  Cheng Sheng BC   Taichung, Taiwan   20 kW   Presumed the male speaker in a non-standard Chinese dialect at 1837 on 4-7 (early morning in HK)  https://dreamcrafts.box.com/s/3jtz0pq29d7emczbpyzqpg8vbmlvmtgk

999  Tien Nan BC   Taipei, Taiwan   1 kW   With female speech in likely Amoy dialect at 1841 on 4-7 (Hong Kong's early morning), this is likely the 24 hour station showing up at a modest level when others should be silent  https://dreamcrafts.box.com/s/gt66p5faxtk4vpvq00hte307dmm20k3n

1134  Zhejiang Zhi Sheng Synchros   Zhejiang, China   Non-CNR1 format with moderate echoes during sunrise session at 2122 on 4-8  https://dreamcrafts.box.com/s/m4yz57g52vrhie1f225m3647r2qkg4ss

1143  BEL3 (Yuyeh BS)   Penghu, Taiwan   100 kW   Awesome signal over hundreds of miles in bright daylight at HK's Cape D'Aguilar at 0836 on 4-6; this was the strongest Taiwan station during daytime DXing in HK  https://dreamcrafts.box.com/s/cq408aemu5jzl2ew8j0cme03nrckecjb

1233  Chung Hua BC   Juifang, Taiwan   1 kW   Distinctive Taiwan pop music dominant over UnID during early morning DXing at 1856 on 4-7  https://dreamcrafts.box.com/s/hpxoa5gdyq04zl67v0b7gf5sqiw8l1ba

1233  UnID-Asian   Male speaker in SE Asian language dominant at the end of this recording; I'm fairly sure this is Thai, but with two Thai stations on the frequency the identity remains a mystery  https://dreamcrafts.box.com/s/hpxoa5gdyq04zl67v0b7gf5sqiw8l1ba

1413  BBC World Service   A'Seela, Oman   800 kW   This powerful Middle East blaster was typically dominant over the Jiangsu co-channel in the early morning in HK. This strong recording in Pashto was made at 1827 on 4-7 (thanks to C.K. Raman for language and station identification)  https://dreamcrafts.box.com/s/r79ii0pb5n1u8empa0pmxdpwnq3o8ozx

A mystery horse race (in English) over the Jiangsu co-channel at 1627 on 4-6 was solved by awesome detective work by Mauno and Andrew Brade, who determined it was the BBC broadcasting the Grand National race over the 1413-Oman relay  https://dreamcrafts.box.com/s/a1b9iegaqfj0l95ghsi1v0xjris4xr8b

1413  Jiangsu  RGD Synchros   China   Dominant over a rising BBC (with unusual horse racing) at 1626 on 4-6  https://dreamcrafts.box.com/s/4v7ygkurhg3nkmi339s5ek39u3sr3ear

1413  Vesti FM   Grigoripol, Moldova   500 kW   One of two Moldovan stations showing up at peak sunrise enhancement on a 7.5 inch loopstick, this was the first long range station received in Hong Kong. At 2206 on 4-6 Russian speech and conversation was received at a modest level without any Chinese interference around local HK sunrise (thanks to Dmitry and Mauno for language identification)  https://dreamcrafts.box.com/s/38vm67oda2jysgwlbyn03ra0etnrakv9

1413  UnID's-Chinese   Two Chinese stations (one strong and one weak) mixing together at 2122 on 4-8; one of these is probably the Jiangsu station, dominant in the evening in HK  https://dreamcrafts.box.com/s/o1wxaeo3eaf6o51h4fi2l8qbyj7i001r

1431  Radio Sawa   Djibouti (east Africa)   600 kW   An early morning surprise at 2141 on 4-7 (based on a Japanese tip), music from this long range station actually fought it out with the Chinese co-channel for almost 5 minutes until a clear, female-voiced "Radio Sawa" ID was heard in Arabic at 4:59 into this recording (thanks to Bill and Chuck for language and station ID)  https://dreamcrafts.box.com/s/ktcgc5i4lixvgrh7ef8a1ueur14i98kh

1431  UnID-China   Mandarin pest which typically made it rough to chase DX around sunrise-- mixing with Djibouti in the above recording (most likely the 24 hour Fujian RGD)  https://dreamcrafts.box.com/s/ktcgc5i4lixvgrh7ef8a1ueur14i98kh

1449  UnID-China   Strong signals from this mystery music station at 2156 on 4-8, shortly before local sunrise in HK  https://dreamcrafts.box.com/s/hh75dnqdfflet9jm5fvqlarpi6yafbns

1494  Educational BC System   Taizhong, Taiwan   10 kW   Presumed the one with American English male speech at 2134 on 4-8 over a weaker co-channel (which may also be in English)  https://dreamcrafts.box.com/s/hfg28y75elndpsvlbpbc923yiqpk1i3x

1494  UnID   Weaker co-channel mixing with Educational BC in Taiwan at 2134 on 4-8; seemingly with English intonation https://dreamcrafts.box.com/s/hfg28y75elndpsvlbpbc923yiqpk1i3x

1512  DZAT   Lucena, Philippines   10 kW   Presumed the one with Christian music format over a Chinese co-channel at 2202 on 4-6  https://dreamcrafts.box.com/s/0okmrp2r96qbhbckzxe6my06lg6kj2wo

1512  Jinan Gushi Guangbo   Jinan, China   Heard prior to 2200 on 4-6, this is the only Chinese station on the frequency that should be operating prior to 2200  https://dreamcrafts.box.com/s/0okmrp2r96qbhbckzxe6my06lg6kj2wo

1530  DZME   Quezon City, Philippines   25 kW   The booby prize for the worst transmitted audio in Southeast Asia goes to this fine broadcaster, the only Filipino on the frequency. This garbled Tagalog was received at 2153 on 4-7  https://dreamcrafts.box.com/s/expghtmcwzb45y9txl4pt6dk7vyi124u

1530  UnID-China   Top of the hour ID at 2200 on 4-6; possibly clear enough for a native speaker to decipher  https://dreamcrafts.box.com/s/d7mbl5fhnxlsyxl33xdzkpqfnnujbm6w

1530  UnID-China   Mandarin language music at 2155 on 4-7; either Zhejiang or Jilin  https://dreamcrafts.box.com/s/ree5oous83eg9ruykscxobxf55mcp55c

1548  Shandong RGD Synchros   China   Poorly coordinated network sounded like a spooky Halloween movie at 1617 on 4-6  https://dreamcrafts.box.com/s/a1jcsk4onxi0eg2clvrnop1e3ymshfqb

Another recording of the garbled Shandong synchros at 2130 on 4-8  https://dreamcrafts.box.com/s/nj3wmjiuzd13iddlqukc0dfcne6qnl77

1548  TWR   Grigoripol, Moldova   500 kW   The last of the long range recordings was made at 1903 on 4-7, about three hours prior to sunrise in HK. Presumed Bulgarian at a modest level, following a tip from Japanese friends  https://dreamcrafts.box.com/s/6vbkqauxw6l3bsa0t9fha5ewk8t0v4jy

1593  CNR1   Changzhou, China   600 kW   Dominant with music at 2147 on 4-8 shortly before HK sunrise over a weaker co-channel  https://dreamcrafts.box.com/s/puun667bobxlnl8hy6187qql21sxxnv1

1593  UnID-Chinese   Much weaker co-channel under CNR1, possibly Yuyeh BC in Taiwan  https://dreamcrafts.box.com/s/puun667bobxlnl8hy6187qql21sxxnv1


Multi-Radio Portable Carry Case - July 2019

Paul Blundell
 

This case is one that I have had for a few months, it has been used in a few different ways. Firstly, it was used with my radio scanners and then for storage at home.  It was purchased from Super Cheap Auto for $12.

More often these days I am carrying my radios with me, due to this I wanted to provide the best possible protection for them. Last night I had some spare time so I sat down and set up this case. The main thing was making sure my radios were protected the best way possible. I spaced out my radios and found this layout would work the best. Each section has a divider which is wrapped in bubble wrap to provide a good level of protection.
I added some thinner foam to the bottom of this. I then installed this in to the case with some doubled sided tape on the bottom and back. This also helps to protect the other bits and pieces I have in the radio case.

Overall, I am very pleased with how well this case has worked out, I am able to carry and store my ultralight radios and everything I need for a portable session. It is also small enough to fit in my back pack. While this case was designed for my ultralight radio kit, the same ideas could be used for other areas of the radio hobby.

Photos: https://tassieradiorxer.blogspot.com/2019/07/multi-radio-portable-carry-case-july.html
--
Paul - Moderator
UltralightDX


Re: Digitech AR-1780 - My Thoughts:

Mark Roberts
 

Jaycar sells to the United States and has a website (www.jaycar.us) specifically for that purpose. I've ordered two AR-1780s from them and have generally been satisfied. They are practically identical to the XHDATA D-808 except for using 4 AA batteries rather than the lithium-ion batteries of the XHDATA.


Re: New Design (2019) FSL Antennas

Tony Magon
 

Hi all


An amendment in regard to the capacitors in both circuits

They are 1n5 rpt 1n5 (1.5nf)

73

Toy VK2IC


April Hong Kong Ultralight DXpedition-- 711-765 kHz Loggings & MP3's

Gary DeBock
 

     Hong Kong has had more than its share of excitement recently, but three months ago the excitement for me was trying to sort out a huge maze of unfamiliar AM-DX stations. A wicked combination of RFI, overcrowding, 5 Chinese dialects and 6 Southeast Asian languages seemed to confirm the pessimistic predictions of other DXers, while attempts to set up a gain antenna on a public beach inevitably resulted in a growing throng of curious Chinese onlookers.
     Finally a 7.5 inch loopstick CC Skywave Ultralight (in the attached photo) was pushed to the max in both daytime DXing trips to Macau and Cape D'Aguilar (the "Rockwork" of the Orient) and also outside the security window of our downtown 12th floor apartment. The souped-up Ultralight was up to the challenge, tracking down AM-DX from Japan (729-JOCK) to Djibouti (1431-Radio Sawa), including diverse reception of about 80 Southeast Asian stations. With such useful information for upcoming trips to Hawaii and other Pacific venues, who could ask for more?

 
711  V.O. Kuanghua   Hsinfeng, Taiwan   250 kW   This is a major Mainland-directed propaganda station in Taiwan, but during daytime DXing in both Macau and HK's Cape D'Aguilar it couldn't hold the frequency down over an UnID Filipino station. This Macau recording at 0637 on 4-4 has a Tagalog radio drama dominant over Kuanghua's Chinese  https://dreamcrafts.box.com/s/pn0nv6bbaadtt6ahobq6s14d82krhaj7

711  VOV1   Can Tho, Vietnam   500 kW   Strong signal with female Viet speech on the HK waterfront at 1425 on 4-7; generally dominant over Kuanghua after sunset  https://dreamcrafts.box.com/s/ue2modz1ihqtzw72b5kzauri5k6mpsvb

711  UnID-Philippines   Dominating the frequency around local noon in Macau with Tagalog radio drama at 0637 on 4-4, the 10 kW DZVR in ideally-positioned Laoag city (on the northern tip of Luzon) would seem like the most likely possibility over hundreds of salt water miles  https://dreamcrafts.box.com/s/pn0nv6bbaadtt6ahobq6s14d82krhaj7

720  BCC   Taichung, Taiwan   10 kW   Dominant with Chinese female speech through 518-NAVTEX noise at HK's Cape D'Aguilar at 0830 on 4-6, for some reason this station was a no show in Macau, where DZSO was the only (weak) signal  https://dreamcrafts.box.com/s/1ya16wh49lpmasypvjxn3xq4k9h5tnfk

720  DZSO   San Fernando, Philippines   5 kW   Weak but all alone around local noon in Macau at 0640 on 4-4, this recording features a Tagalog-speaking lady with an energetic "Radio Bombo" ID at 23 seconds  https://dreamcrafts.box.com/s/vdjoibaihbf65bgzobh948y871jxwg5r

720  UnID-Chinese   Male-female Chinese speech on the HK waterfront during a sunset skip session at 1428 on 4-7; unknown if this is BCC or a mainland station (CNR2 in Fujian?)  https://dreamcrafts.box.com/s/vqjlx2cmwo8bz915qylmg8iaxkvtz7wp

720  UnID-South Asian Music   Another HK waterfront signal after local sunset with female Hindi-type vocal music dominant on the frequency at 1426 on 4-7. No identifying details, but AIR in Chennai would be in propagation at the time  https://dreamcrafts.box.com/s/0gfknh9ewvwr0cbnbv2jmklg3bcfiftz

729  Jiangxi RGD Synchros   Jiangxi, China   Poorly coordinated network with multiple Chinese echoes during HK waterfront DXing at 1429 on 4-7  https://dreamcrafts.box.com/s/3djjvzjqnrztpc3ym4pkyw4pyx0e7b1s

729  JOCK   Nagoya, Japan   50 kW   Japanese female speech at modest level during an early morning session at 1911 on 4-7; oddly enough, this was the only reception of Japan during the entire Hong Kong trip  https://dreamcrafts.box.com/s/l1o9cus8r96n3huv75w9itnde8v549ol

729  VOV2   Dong Hoi, Vietnam   200 kW   Male Viet speech // 702 dominant over Jiangxi synchros and UnID music during HK waterfront DXing at 1430 on 4-7; the 702 parallel is included from 12 to 24 seconds  https://dreamcrafts.box.com/s/84jlphrpll7st87i3i8gv2tlh7akl9gd

729  UnID-Asian   Female vocal music continuing through Jiangxi's Chinese and VoV's Viet speech during sunset skip DXing on the HK waterfront at 1431 on 4-7; the 100 kW Myanma Radio would seem like a strong possibility  https://dreamcrafts.box.com/s/6uamzuthim1cy4j2otrf1944trdug6ab

738  BEL2   Penghu, Taiwan   100 kW   The west coast TP regular blasted in during daytime DX in both Macau and HK's Cape D'Aguilar, managing one of the most overwhelming signals ever received over hundreds of miles in bright daylight. The HK cape signal with female vocal music at 0845 on 4-6 was so strong it was throwing splatter on 729 and 747, and features the 1143-BEL3 parallel from :52 to 1:39 (which was even a shade stronger)  https://dreamcrafts.box.com/s/73t1nkfw91uc13pc2vd2cw69kki91g6g

The same prolific station was potent on the Macau waterfront as well at 0648 on 4-4, managing this 7-minute stretch of Taiwan Fisheries' diverse programming around local noon  https://dreamcrafts.box.com/s/nrlqunwdtcgak1vn91e0649u7yb58ngy

738  UnID-Chinese   Two Mandarin Chinese stations mixing together at good strength at 1612 on 4-6, one of which is surely BEL2 from Taiwan (likely the one with pop music, building up strength). As for the male speaker starting off the recording, there are many Mainland possibilities but seemingly no identity clues. The 2 kHz heterodyne is almost certainly from the no-show 740-VOV2  https://dreamcrafts.box.com/s/50398exipewc6vuyanzw2o6e7fmvcwwz

747   CNR1   Shanwei (Guangdong), China   10 kW   Seemingly the most likely source of this Macau daytime DX signal // 756 around local noon at 0652 on 4-4; there is a weak UnID showing up late in the recording, possibly the station showing up under CNR1 at HK's Cape D'Aguilar (below)  https://dreamcrafts.box.com/s/22n1gpv3elep64y7ck5w6l3akutdwfwv

747  UnID-Mandarin Chinese   Fair strength female voice under CNR1 at HK's Cape D'Aguilar at 0839 on 4-6; probably Guangdong RGD in Zhanjiang  https://dreamcrafts.box.com/s/4z87mlrnj8b3jw12t85gw1bnq8lholbl

756  CNR1   Zhuhai (Guangdong), China   50 kW   Macau daytime DX semi-local had an overwhelming signal over a weak UnID around local noon at 0655 on 4-4, unlike the wild situation on this frequency at HK's Cape D'Aguilar  https://dreamcrafts.box.com/s/kng3vmpj6k3h2sobxhpbm6uw6jolcdy1

756 UnID's-Chinese   This frequency was a madhouse during daytime DX at HK's Cape D'Aguilar at 0841 on 4-6, with the Zhuhai CNR1 station greatly reduced by the solid rock cliff. Taiwan's 20 kW Cheng Li chih Sheng is almost certainly in the wild mix, but since China only has CNR1 on this frequency, two of the stations are likely to be poorly synchronized CNR1 relays with the same (but delayed) programming  https://dreamcrafts.box.com/s/k7l85rbtz7xmwsk5olbdw3vypkdg2gr2

765  UnID's-Chinese   Another wild mix at 1523 on 4-4, featuring at least two male Chinese speakers from different stations and an UnID music broadcaster. 600 kW CNR5 from Fujian is likely in the mix, as well as Shaoguan RGD in Guangdong. There are no clues from the music station, but four Philippine stations are on the frequency  https://dreamcrafts.box.com/s/bokzjlytegctpzentd1hhcq5iky87xnw

(TO BE CONTINUED).    


Re: Building a 3" Baby FSL

Al Short
 

Ccrane TCF. with FSL antenna

Has anyone experimented using a FSL with the Ccrane TCF?  I woul imagine either
inductively coupling an FSL to the large Ccrane pickup or hardwiring the FSL output to the amp module might well produce interesting results.


Re: Building a 3" Baby FSL

jbarbre52@...
 

Thanks Gary. That is exactly what I was looking for.
73 de Jim Barbre KB7YSY


Re: Building a 3" Baby FSL

Gary DeBock
 

Hello Jim,

<<<   I am interested in building a 3" Baby FSL antenna and have a few questions.    >>>

Glad to help! The 3 Inch Baby FSL project is essentially a rework of the 3.5 Inch "Frequent Flyer" FSL antenna, for which a 22-page "Heathkit-like" full construction article is posted at  http://www.mediafire.com/file/pnfm8909c77zjoy/3.5inch-FF-FSL.doc/file

<<<   I just ordered 24 ferrite rods, but they are 8mm x 140mm, slightly longer than the ones Gary used. What impact, if any, will that have on the final product? Can I use a hack saw to shorten them? Is that even necessary?    >>>

No, it is not necessary! Using the 140mm x 8mm rods will give you a slightly longer and slightly more sensitive FSL than using the 120mm x 8mm rods (which are no longer available), but cutting the rods would give you nothing except a slightly shorter FSL.

<<<   What kind of material separates the rods from the PVC pipe and how thick is it? What kind of material separates the Litz wire from the rods? How is the Litz wire connected to the variable capacitor? (Any extra resistors or capacitors involved? Where on the variable capacitor do the wires connect?)   >>>

You can get a lot of information about the type of materials used by reviewing the full construction article linked above, but the 3" Baby FSL uses a slightly smaller rubber plumbing coupler (Fernco 1056-125 instead of Fernco 1056-150), some rubber locking tabs to prevent ferrite rod movement, and a much higher performance variable capacitor (384P model from Oren Elliott Products, or Mike's Electronic Parts).

Depending on the interest in (and demand for) the 3 Inch Baby FSL antenna another full construction article may be written for it alone, or possibly an addendum will be added to the article linked above. Although the larger and heavier 3.5 Inch "Frequent Flyer" FSL is slightly more sensitive than the 3 Inch Baby FSL, the smaller antenna puts up an extremely close fight because of its superior variable cap, which turns it into a compact DXing firecracker.

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

 
 
 


Re: 3 Inch FSL Tecsun PL-380 Model

Gary DeBock
 

<<<    I have also made the same mistake when fixing mine of gluing both sections together. Mine will be used until it dies.   >>>

Thanks Paul,

Actually the PL-380 will work fine after you do this until it needs internal servicing-- at which point both you and the PL-380 will be out of luck.
You would be surprised how many of these PL-380 emergency glue jobs are on borrowed time around the world.

Gary



 


Re: 3 Inch FSL Tecsun PL-380 Model

Paul Blundell
 

Thanks for the information and follow up post on this.

I have also made the same mistake when fixing mine of gluing both sections together. Mine will be used until it dies.

On Fri, Jun 28, 2019 at 7:49 AM Gary DeBock via Groups.Io <D1028Gary=aol.com@groups.io> wrote:
For those interested in the resolution of this problem, Jerry's 3 inch FSL PL-380 model was received here yesterday, but it was not repairable. There were several issues, but the deal breaker was the orange antenna frame being glued across both the front and back cabinet sections (contrary to the article's instructions at http://www.mediafire.com/file/w0gcek56f6aq7kr/3_Inch_FSL_Tecsun_PL.doc/file
so the PL-380 could not be opened up for servicing. When "supercharging" any Ultralight, avoid the temptation to do this!

Fortunately I had enough spare PL-380 parts and 250/46 Litz wire on hand to take the 8 Russian 100mm bars and build a new 3 inch FSL Pl-380 model for Jerry, as in the attached photo with the old model. (Sorry that I can't do this for others).

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



--
Paul


--
Paul - Moderator
UltralightDX


Building a 3" Baby FSL

jbarbre52@...
 

I am interested in building a 3" Baby FSL antenna and have a few questions.
I just ordered 24 ferrite rods, but they are 8mm x 140mm, slightly longer than the ones Gary used. What impact, if any, will that have on the final product? Can I use a hack saw to shorten them? Is that even necessary?
What kind of material separates the rods from the PVC pipe and how thick is it? What kind of material separates the Litz wire from the rods? How is the Litz wire connected to the variable capacitor? (Any extra resistors or capacitors involved? Where on the variable capacitor do the wires connect?)
Thanks for the info.
73
Jim Barbre
KB7YSY


Re: 3 Inch FSL Tecsun PL-380 Model

Gary DeBock
 

For those interested in the resolution of this problem, Jerry's 3 inch FSL PL-380 model was received here yesterday, but it was not repairable. There were several issues, but the deal breaker was the orange antenna frame being glued across both the front and back cabinet sections (contrary to the article's instructions at http://www.mediafire.com/file/w0gcek56f6aq7kr/3_Inch_FSL_Tecsun_PL.doc/file
so the PL-380 could not be opened up for servicing. When "supercharging" any Ultralight, avoid the temptation to do this!

Fortunately I had enough spare PL-380 parts and 250/46 Litz wire on hand to take the 8 Russian 100mm bars and build a new 3 inch FSL Pl-380 model for Jerry, as in the attached photo with the old model. (Sorry that I can't do this for others).

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


TECH: Big Litz 1162/46 and 1200/46 tested on HP Q meter

Steve Ratzlaff
 

Here are the results of testing 1162/46 Litz (pink color, from eBay seller Ming) and 1200/46 Litz (blue color, from eBay seller in Canada, same as blue 1200/46 Litz from Chinese eBay seller) on my HP 4342A Q meter. Each was wound as a solenoid on a low loss styrene plumbing coupler. As many turns as would fit on each coupler was wound--the 1200/46 being slightly fatter, one or two turns fewer were wound for that coil. 163.5 uH for the 1162/46; 152.5 uH for the 1200/46. The Q meter's variable cap goes to 475 pF, so about 590 kHz was the lowest frequency tested that would resonate the coil.

In summary, the 1162/46 Litz has higher Q up to about 1300 kHz--quite a bit higher, especially at the low end. Above that both coils are closer in Q.

Note this is purely an "unloaded Q" test, for the coil all by itself. For use in a Ferrite Sleeve Loop there of course are other factors--the Q of the ferrite material and surrounding material, the Q of the tuning capacitor, and probably other factors. I can't positively say a higher Q coil leads to a better-performing (more sensitive and/or sharper tuning) FSL, but theory says that is so. Gary DeBock's A/B comparison tests on real signals with real FSLs indicates this is so, as well.

73,

Steve Ratzlaff AA7U

1162/46 Litz coil, unloaded Q test

590 kHz 1652 Q

700 kHz 1676 Q

800 kHz 1650 Q

900 kHz 1598 Q

1000 kHz 1524 Q

1100 kHz 1435 Q

1200 kHz 1322 Q

1300 kHz 1152 Q

1400 kHz 797 Q

1500 kHz 827 Q

1600 kHz 873 Q

1700 kHz 813 Q

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

1200/46 Litz, unloaded Q test

590 kHz 1190 Q

700 kHz 1266 Q

800 kHz 1293 Q

900 kHz 1296 Q

1000 kHz 1274 Q

1100 kHz 1228 Q

1200 kHz 1122 Q

1300 kHz 1052 Q

1400 kHz 924 Q

1500 kHz 847 Q

1600 kHz 808 Q

1700 kHz 756 Q


Re: New Design 3 Inch Baby FSL Antenna Demo Video

Michael.2E0IHW
 

Very useful hint, Mikek. Thanks!
Michael UK


On 27/06/2019 15:54, lamontcranston17 wrote:
  I just wanted to mention my method of soldering large count litz wire.
 I set a spoon on my electric stove, then melt a large drop of solder
in the center of the spoon,
"guessing" just under 3/8" across. I dip about 3/8" to 1/2" of the litz
into rosin flux and then
I put that into the melted solder on the spoon. Basically a mini solder
pot. I have had great success,
with thoroughly saturated litz. Once you have a good tinning job on the
litz, it's fairly easy to solder.
 A couple of notes; I usually set the other end of the spoon on
something to make the level. There is a
lot of heat coming from the burner so it is a little trick to get in and
out before your fingers get to hot.
My spoon, I thing it's stainless steel. I also have put some flux in
with the solder on the spoon,
and you may need to experiment with the burner temperature setting.
 I have used this for at least ten litz wires and I'm happy with it.
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