2020 I.R.C.A. Convention information and reservation link

Mike Sanburn

The 2020 I.R.C.A./Decalcomania Convention will be held at The Four Points by Sheraton 1221 S. Harbor blvd. Anaheim CA 92805 (Just North of Disneyland) Sept. 10,11,12. Phone number for reservations is 714-758-0900 mention convention. Room rate is $155 per night plus tax which includes all you can eat breakfast. Parking is $10 per day. Registration fee (not including banquet) is $25 payable to Mike Sanburn  po box 1256  Bellflower CA 90707.  Events will include local tower visits, annual I.R.C.A. auction, and nightly fireworks show. Hotel ammenities include free wifi, pool, and business center.  Local eateries include Starbucks Coffee, Taco Bell, Shakeys Pizza. More details will appear soon. For information contact mikesanburn@...   Special link for online reservations follows:   Tourism information website: 
The official visitor's guide for all things Anaheim. Find information on where to go, things to do, and explore trip ideas in Orange County.

Junk ferrite cores


People keep upgrading their PC monitors, and a lot of monitor cables are being thrown away. First  VGA, and now DVI. Many of them have EMI suppression ferrite cores of various sizes.
They come essentially for free if you know where to look. I accumulated a dozen or so of these, planned to use them for common mode suppression chokes. The material is unknown, but seems to work well on HF frequencies.
Have anybody in this group tried to use these cores in a loopstick antenna? They can be glued together to form a "rod" of sorts.

73, Mike AF7KR

Re: New style of FSL........I think ?


I am not an expert in ferrite antennas, just have a gut feeling: shouldn't the rods be moved more to the center, so that they are not sticking outside of the coil?
Intuitively, the magnetic material should be in the desired path of the magnetic field lines - inside the coil, not outside. The ferrite outside of the coil may actually "short circuit" the field lines and reduce the antenna effective height.
I am sure it still concentrates the field in the vicinity of the coil, but maybe not in the most efficient way.

Mike AF7KR

531 kHz UnID-- Ausralian Assistance Needed (Again)

Gary DeBock

This is another mystery recording from last month's Poipu, Hawaii DXpedition, featuring Australian English on 531 kHz at 1503 UTC during a sunrise session on November 5th. There is apparently a weather report in the first part of the recording, foillowed by a lady presenter at 49 seconds saying something like, "More to come, from Radio Australia" (?). Other than this strange statement it would seem like the format is similar to 4KZ in Innisfail, but if any Australians or Kiwis can listen to the recording I'm sure that the identity mystery would be solved-- help!

73, Gary DeBock (DXing in Poipu, Hawaii from November 2-8)

Re: New style FSL Part 2



Are the nulls sharp on the main loop? Like a loop which is edge-wound? I'm imagining all that ferrite stuck through the loop sideways distorting the pattern. Maybe it doesn't effect it that way.

Just curious.


Re: New style FSL Part 2


It would be interesting to see how you align the two loops and the
directions of the received and the offending station/noise.
Even just a quick sketch would be very helpful, as I'm not understanding

                        Thanks, Mikek

Oklahoma TP DX 12-9-19

Richard Allen <dx747j@...>

TP reception was down from that yesterday.

567 JOIK fair at 1322; barely audible at 1342 (LSR 1330).

594 JOAK fair at 1316; poor at 1321; poor at 1328-1340 with unID co-channel QRM; barely audible before fading out at 1344.

774 JOUB fading in at 0730; poor at 0851; fair signal at 1206; good at 1313.

972 HLCA heterodyne noted from 0745 until past LSR.

1287 JOHR barely audible Japanese talk at 1325.

1566 HLAZ poor at 1231.

Receiver: Skywave with ALA1530LNP aerial.

Richard Allen, near Perry OK USA.

Re: New style FSL Part 2


The idea of using two separate loops to produce phase cancellation can be applied to either QRM, QRN, and/or unwanted medium wave signals.

Two signals of equal amplitude and 180 degrees out of phase with reference to each other will cancel. This can be easily demonstrated mathematically, or even with a CRO. In the real world, especially with varying evening amplitude from E layer skywave signals, the phase relationships do not usually correspond to a perfect null. Nevertheless, useful signal nulls can still be obtained.

I can use my home-constructed 40 inch side length PVC box loop in conjunction with a 25.6 inch (65 cm) diameter PK circular loop for nulling QRM, QRN, or unwanted MW signals. The large 40 inch loop is the DX antenna, while the smaller 25.6 inch loop is the noise pickup antenna. Both antennas introduce phasing via inductive coupling.

The late Joseph J. Carr wrote a paper detailing the advantages of using two loops to introduce phase cancellation [1].


Sydney, AU


Re: New style FSL Part 2

Dean wayman

By drilling a hole in the center of the ring (that's why i used plastic) and if needed a little glue.
Dean W.

Re: New style FSL Part 2

Jim B

Dean, The design looks relatively easy to construct, but how do you secure the ferrite rods to the pipe?  Jim

Re: New style FSL Part 2

Dean wayman

Using the smaller loop as a noise antenna completely gets rid of the house noise /hash.

This is a Huge advantage for me as I can DX in my home again :P

Dean W.

New style FSL Part 2

Dean wayman

So what's next in the project Dept. ??
Yup you guessed  it !   BIGGER   :P

Made with a ring cut from a 8 1/2 inch water pipe ,and 29 Ferrite 8x80 mm rods then wound with 1200/46 litz ;
This loop gives even more signal boost ,but the biggest advantage is using it with the smaller loop that was made before as a phasing array

I used these two loops to good affect tonight at sunset on 650 Khz to get KGAB orchard Valley Wyo. as WSM was fading in and using the smaller loop as a noise antenna I got rid of all my house  hash /qrm This should prove very useful when the weather warms and I get get some place quiet ?


Dean wayman


Oklahoma TP DX 12-8-19

Richard Allen <dx747j@...>

Possibly the best TP DX morning here in many weeks (LSR 1329).  Except for occasional fading up and down, JOUB was audible whenever checked.

567 JOIK poor at 0801 and 1043 with moderate 570 kHz splatter.

594 JOAK poor at 1128.

693 JOAB poor on barefoot PL-310 ULR at 1053.

702 heterodyne audible from 0812 until past sunrise.

747 JOIB fair on barefoot PL-310 ULR at 1051.

774 JOUB faded in with poor (readable) signal at 0721; fair at 0806 and 0910; fair on barefoot PL-310 at 1048; good on PL-310 & ALA1530LNP at 1112 and 1220.

846 weak trace of a signal at 0854.

972 HLCA heterodyne at 0737; poor talking at 0757.  

1098 heterodyne at 0816.

1242 weak heterodyne at 0804 and 1119.

1287 JOHR barely audible at 0732, peaking to poor at 0734.

1422 weak heterodyne at 1232.

1566 poor with choral music at 1235.

Receiver: Skywave and PL-310 with ALA1530LNP aerial.

Richard Allen, near Perry OK USA>

Oklahoma TP DX 12-7-19

Richard Allen <dx747j@...>

TP DX was better here this morning than for the past few days (LSR 1328). Again, JOUB was the most consistent signal received.
567 JOIK barely audible when checked at 1002, 1313 and 1325.
594 JOAK poor at 1324.
693 JOAB barely audible in extreme domestic 690 kHz QRM at 1333.
702 NHK2 (assume JOKD) strong heterodyne and barely audible talk // JOUB at 1254; het was audible through sunrise.
711 unID heterodyne at 1318.
747 JOIB poor with NHK TS pips for 0900, followed by woman talking; poor in 750 kHz splatter at 1000.
774 JOUB poor at 0821and throughout morning until fade out at 1330.
828 JOBB heterodyne against excellent WCCO signal at 0855; strong het at 1250; poor audio briefly at 1335.
972 HLCA strong heterodyne from 0956 until past sunrise; barely audible to poor talking at 1322-1328.
1566 HLAZ barely audible to poor at 1315-1316; fading in and out barely audible to poor at 1337 until close at 1344.
Receiver: Skywave with ALA1530LNP.

Richard Allen, near Perry OK USA

Hawaii DXpedition Loggings & MP3's (567-630 kHz)

Gary DeBock

     This is the second group of loggings and MP3 links from the November 2-8 Poipu, Hawaii DXpedition with Craig Barnes and Australian Chris Rogers. Highlights in this group included an intriguing 594 kHz UnID, six stations received on 603 kHz alone and an S9 Filipino on 630 that made me wonder if Hawaii had a new local pest.

     File review from this trip is proving to be quite interesting, with 44 stations already recorded on the frequencies from 530-630 kHz alone, and almost all of the band yet to come. For those interested in the full logging list so far (along with additional trip photos and narrative), a basic DXpedition file is posted at
567  JOIK   Sapporo, Japan   100 kW   Splatter-challenged reception // 729 only 3 kHz away from Kauai local on 570 at 1545 on 11-5

585  2WEB   Bourke, Australia   10 kW   Presumed the one with the usual late night music format not // 792 at 1536 on 11-7; some 590 Honolulu splatter

585  7RN   Hobart, Australia   10 kW   Good level female conversation // 792 through 590 Honolulu splatter at 1513 on 11-6

585  JOPG   Kushiro, Japan   10 kW   Splatter-challenged reception // 594 at 1548 on 11-5; modest signal, and unable to null 590-Honolulu

594  3WV   Horsham, Australia   50 kW   Male-female conversation // 702 through 590 splatter at 1540 on 11-7; UnID female speaker underneath in mystery language

594  JOAK   Tokyo, Japan   300 kW   Getting through 590 splatter fairly well with music and speech // 585 at 1555 on 11-5

594  UnID-Asian   Female speech under 3WV at 1540 on 11-7; doesn't sound like Japanese-- more like an unusual Asian language

603  2RN   Nowra, Australia   10 kW   Female speech // 792 under 4CH male speech at 1546 on 11-7; only heard once during the trip

603  4CH   Charleville, Australia   10 kW   Male conversation // 612 at good level over R. Waatea at 1547 on 11-7

603  CRI   Dongfang, China   300 kW   Vietnamese service signing on with TOH chimes at 1600 on 11-4, temporarily wiping out HLSA

*603  HLSA   Namyang, S. Korea   500 kW   Strong Korean female and male speech during TOH routine at 1558 on 11-5

603  Radio Waatea   Auckland, New Zealand   5 kW   The usual male Maori announcer playing Maori music at 1545 on 11-7, until losing the battle with 4CH

603  UnID- China   Chinese-inflected female speech mixing with rock music from HLSA at 1543 on 11-4-- maybe Hulun Buir? Doesn't sound like CRI

        The K-Pop song on HLSA during the recording is "Summer Love" by Ulala Session (thanks to Chris Kadlec)

*612  4QR   Brisbane, Australia   50 kW   Call-in quiz at overwhelming strength at 1548 on 11-7; this station and 630-4QN were at S9 strength every morning

612  JOLK   Fukuoka, Japan   100 kW   Good-strength Japanese stock report // 729 at 1610 on 11-5

612  UnID-DU   Instrumental music nulling southwest under 4QR during DU-slanted conditions at 1619 on 11-2; Star synchros?

621  3RN   Melbourne, Australia   50 kW   Male conversation about western civilization // 792 on a noisy frequency at 1558 on 11-7

621  Pyongyang BS   Chongjin, N. Korea   500 kW   Typical female vocal music and Korean speech at good level at 1521 on 11-2 (with somewhat degraded audio due to an off-frequency transmitter, a long term issue)

*621  Radio Tuvalu   Funafuti, Tuvalu   5 kW   Typical island choral music at a typically strong level at 0828 on 11-2

          Male speech in the island language at 0821 on 11-2

*630  4QR   Townsville, Australia   50 kW   ABC fanfare at typically overwhelming strength at 1600 on 11-7; an UnID station with 5 + 1 pips is underneath

          Australian weather report and ABC promo at an S9 level at 1603 on 11-7

630  BCC (News)   Ilan, Taiwan   10 kW   BCC chimes at the TOH, with both Chinese and “News Radio” English ID’s (at 53 seconds) at 1500 on 11-4

*630  DZMM   Quezon City, Philippines   50 kW   S9 strength all alone with female ID at 53 seconds (“DZMM, 55 years in the service of the Filipino”) at 1623 on 11-2

630  UnID-DU   5 + 1 Time pips under 4QR’s ABC fanfare at 1600 on 11-7; probably RNZ in Hawkes Bay

630  UnID-TP   Female Chinese-inflected speech under BCC’s male Chinese speech around 3:45 in the recording at 1500 on 11-4; CNR2?



Re: 540 kHz UnID-- Australian English Assistance Needed (Again)


Well said,I agree with you.

On Wed, 4 Dec 2019 at 6:03 PM, radiojayallen <radiojayallen@...> wrote:
One thing I love about this string is how the internet has let us pool our resources. Before the internet many (if not most) of us were all by ourselves in our hobby, but I have met many people thanks to online discussions. With all the negative press social media gets these days I just wanted to point out one of its positive aspects.


Re: Tecsun R-9700DX or Tecsun PL310ET


I agree with this assessment. I will also say that I have two of bought way back when it first came out (maybe 10 or more years's been around quite long time) and one purchased last year and the older one is slightly better aligned then the newest one. It is a decent performing analog radio and I like it overall but having a fairly low accuracy analog dial it is not a DX'ing favorite...better (for me) for program listening and general band scanning to see what's there. Also has Pre-DSP Fm which is not very selective.


Re: 540 kHz UnID-- Australian English Assistance Needed (Again)


One thing I love about this string is how the internet has let us pool our resources. Before the internet many (if not most) of us were all by ourselves in our hobby, but I have met many people thanks to online discussions. With all the negative press social media gets these days I just wanted to point out one of its positive aspects.


Re: 540 kHz UnID-- Australian English Assistance Needed (Again)

Paul Blundell

Nothing local to me so I agree with the above.

Paul - Moderator

3241 - 3260 of 32308