Date   

Re: 918-Australian UnID in the Cook Islands-- 2XL in Cooma?

Gary DeBock
 


<<<   I have listened to this file multiple times, as much as I try I am not able to give you a solid ID. 2XL has now moved to FM and this frequency has not been one that I have devoted much DXing time to.   >>>

Thanks for listening to the MP3, Paul, and it's no big deal that this 918 kHz Oz station remains unidentified. Australia from the Cook Islands isn't exactly exotic DX :-)

I just thought that with 918-2XL having gone silent on AM, I had better ask for opinions before the station's programs fade from the memory of the local AM-DXers.

73, Gary



DX500 - 29/01/2020

Paul Blundell
 

My latest report with photos and a video is online now: https://ultralightradiodxing.blogspot.com/2020/01/dx500-29012020.html

--
Paul - Moderator
UltralightDX


Re: Looking for Paul S / Ferrite in SE CT- FARMERIK

Rik
 

Thanks Paul.

I saw your email before I saw your message here.

I will use a microphone or phono input on a tube Hi-Fi amp made in the 1950's. I have a collection of them to try. It is mentioned in the Miller literature.

Also I expect the 20 Kc. wide selectivity will be too wide, and would want to change the caps to the values recommended by Miller to increase sensitivity and narrow selectivity some what.

I will be choosing from four sharply directional BOGs so adjacent 'channels' will be less common on the dial, and signal strength from the antennas will be high.

They connect into the house via co-ax so low impedance compared to just an inverted L wire directly connected. I may need a matching transformer at the Miller?

-FARMERIK


Re: 918-Australian UnID in the Cook Islands-- 2XL in Cooma?

Paul Blundell
 

Hi Gary.

I have listened to this file multiple times, as much as I try I am not able to give you a solid ID. 2XL has now moved to FM and this frequency has not been one that I have devoted much DXing time to.

Paul
--
Paul - Moderator
UltralightDX


Re: 2019 Shootout?

Paul Blundell
 

I have a couple of Ultralight radios which I have posted reviews for:

https://ultralightradiodxing.blogspot.com/2020/01/review-digitech-ar-1733-dsp-mwfmlwswair.html

https://ultralightradiodxing.blogspot.com/2020/01/review-teac-pr130-portable-amfm-radio.html

I have recently noticed a local store has a ultralight radio for $19.95 which has a digital display, this is something I am planning on purchasing to test it out.


--
Paul - Moderator
UltralightDX


Re: Looking for Paul S / Ferrite in SE CT- FARMERIK

Paul S. in CT
 

Miller made these pretty good in the day. More modern individual components would make it better using ceramic caps and tighter tolerances.

For a start the manual suggests using a 15pF cap on top of both L1 and L2, this is advisable, 18pF looks OK if two are handy. I'm not sure what the Audio Output is intended to be, but I presume 2K headsets of the day (50's). These are coil-wound (inductive type) headphones. Tough to find in new condition and working well.

Modding this with my low power amp requires two crystal earphones in parallel (a great idea no one talked about in the modern day) to be directly driven by the transistor. This would not need any part of the Miller circuit from the diode to the right, substituting the amp. I'll email the small diagram of the whole radio I built, you would not need my "front end". In your case, the 68pF cap that is input cap can to be lowered to 56 or 47pF. Some trade off of final volume for select-ivity, but OK to use 68pF (not any higher though).

Regards
Paul S. in CT fn31nl


Re: Looking for analog receiver suggestions (not necessarily modern nor ultralight)

Rik
 

DEFINATELY take advantage of Jay Allen reviews and excellent information! And since he posts here, he may answer questions after you read his reviews-


https://radiojayallen.com/am-portables-mega-shootout-2019-update/

Also read his article about the RCA globetrotter portables for AM DXing which are my favorite classic analog portable for DXing which is not an expensive model because of excellent selectivity.

In his reviews you will see a number of currant Sangean AM FM portables DX very well. I have a PR-D7 modified to add a antenna jack by PK loops AU. When connected to an outside antenna, it beats the other Sangeans coupled with any external coil I have to the same antenna. If you can wind a coil on the ferrite inside one of the other Sangeans Jay recommends, it should be even better if you use external antennas. -FARMERIK

Barefoot just go with Jays recommendations.


Re: 2019 Shootout?

Marc Coevoet
 

Op 28/01/2020 om 12:41 schreef Rik:
I wonder if I connected the MLA-30 across the antenna winding. It that likely to work? Another way is add a second  winding on the ferrite antenna to couple, but finding the right number of turns would take [me] lots of experimenting. I don't understand enough about RF theory to have any idea where to begin- FARMERIK


I connected the mla30 with an external 2 meter x 2 meter loop, and it works nicely! And what a signal!



Marc

--
The "Penguin" has arrived - and he's not going away - ever.
For former Apple users: Xubuntu.org (menu's up left)
For former Windows users: Lubuntu.org (menu's down left)


Re: 2019 Shootout?

Rik
 

I wonder if I connected the MLA-30 across the antenna winding. It that likely to work? Another way is add a second  winding on the ferrite antenna to couple, but finding the right number of turns would take [me] lots of experimenting. I don't understand enough about RF theory to have any idea where to begin- FARMERIK


Re: Looking for Paul S / Ferrite in SE CT- FARMERIK

radiojayallen
 

I don't have any info for you on this but just wanted to comment that this looks like an interesting and fairly unique device. Good luck with it!

Jay


Re: 2019 Shootout?

Rik
 

Back to ULR's, I did buy one of those MLA-30 amplified untuned loops which ARE very compact and light weight, mainly to use with the PL-360 series of radios.  When you unplug the stock antenna you can plug in modified ones for the chip to tune, but they don't like tuned loops. The MLA-30 is not tuned. It adds a few more stations during an ETM scan. I just checked around 9:30 PM local time and the stock ferrite for one of my PL-360 locks on 47 AM stations while the MLA-30 makes it lock on 55 AM stations. That is not a lot more, however the MLA-30 really boosts WEAK AM stations so it should help ID new stations. Actually my guess is the PL-360 WANTS a coil to tune. It does much better on my few SONY and Sangean models with 1/8th antenna jacks which work on MW.  Probably the correct air core or ferrite coupler and  a plug in antenna in the PL-360 may be better. That of course would work with all the other ULRs.- FARMERIK


Looking for Paul S / Ferrite in SE CT- FARMERIK

Rik
 

If I remember correctly, you used to DX with simple one active device radios. I just won a Miller Hi Fi crystal AM tuner on Ebay, and wondered if the germanium crystal could be replaced with something more sensitive or a detector/amp solid state device I could power with a battery. I don't want to permanently modify the antique tuner. Here is a page with links-

http://fmamradios.com/XtalTuner.html

Yes, I know it is not an ULR, but could be built small enough.

All are welcome to answer this, not just Paul S.


918-Australian UnID in the Cook Islands-- 2XL in Cooma?

Gary DeBock
 

918 2XL Cooma Commercial 2k NSW
918 4VL Charleville Commercial 2k QLD

During a wild trip to Aitutaki in the Cook Islands in April of 2018 this very wild recording on 918 kHz was made at 1658 UTC on April 12th, with a 7.5" loopstick CC Skywave and 5" FSL antenna. It starts off with the Cambodian National Anthem from 918-RNK, the infamous "Cuckoo Clock" time pips at 1:41 (a mix of the time pips from Shandong in China, and RNZ from New Plymouth and Timaru) and an Australian UnID at near S9 level from 4:05 to 4:45. There is a musical into starting at 4:05 and finally a "Midnight, with Merv Starr" program identification at 4:36 into the recording. Does anybody know if this program was on 918-2XL overnight (or on 4VL, for that matter)? Any assistance from Oz would be appreciated-- thanks!  https://dreamcrafts.box.com/s/qams92h5ktn7ki93u3qlvbzvyl3y8rru

Gary DeBock (in Puyallup, WA, USA)

 


Re: Australian Stations - January 2020

Todd
 

Australian capital city stations like 873 Sydney 2GB, and 1116 Brisbane 4BC will be around a long time. This is because they attract older (maybe very old) listeners for mainly talk-back. These listeners however are on borrowed time, so who knows what will happen economically to stations like 2GB and 2UE when this older generation passes on. But current ratings surveys show that 873 2GB is the number one AM station in Sydney [1]

In view of the recent catastrophic Australian bushfires, it could be reasoned that high power ABC radio regional MW outlets are here to stay indefinitely. They provide an important PSA resource for mainly rural area listeners. High VHF band digital coverage is short-range and unreliable compared to medium wave.

The ACMA AM to FM conversions are only planned as an option for station management to decide. The ACMA cannot force AM stations to move. Existing AM stations have the option of not moving to FM. It all depends on various factors such as signal area coverage, population, transmitter fees, etc.

Regards,

Todd
Sydney, AU

1. https://www.radiotoday.com.au/radio-ratings-survey-6-2019/


Re: Australian Stations - January 2020

Paul Blundell
 

Thanks Todd, I will check it out.


On Sat, 25 Jan 2020, 6:21 p.m. Todd via Groups.Io, <toddemslie=yahoo.com.au@groups.io> wrote:
The Australian ACMA website has a list of pending AM to FM conversions. Quite a few stations will go forever such as recently departed 918 KHz Cooma.

Time to record these AM stations while they remain on air. 

https://www.acma.gov.au/am-fm-conversions

Pending AM to FM Conversions:

State Markets
New South Wales

Armidale

Grafton

Gunnedah

Inverell

Lismore

Lithgow

Moree

Nowra

Parkes

Tamworth

Taree

Young

Victoria Wangaratta
Western Australia Albany


--
Paul - Moderator
UltralightDX


Re: Australian Stations - January 2020

dave_m1ctk
 

What do think the chances of the big stations like 2GB and 4BC etc going to FM in the next few years ? I was tuning around the Brisbane airspy server and the FM band certainly doesn't seem overly crowded so is this the case nationally I wonder ? 


On Sat, 25 Jan 2020, 07:21 Todd via Groups.Io, <toddemslie=yahoo.com.au@groups.io> wrote:
The Australian ACMA website has a list of pending AM to FM conversions. Quite a few stations will go forever such as recently departed 918 KHz Cooma.

Time to record these AM stations while they remain on air. 

https://www.acma.gov.au/am-fm-conversions

Pending AM to FM Conversions:

State Markets
New South Wales

Armidale

Grafton

Gunnedah

Inverell

Lismore

Lithgow

Moree

Nowra

Parkes

Tamworth

Taree

Young

Victoria Wangaratta
Western Australia Albany


Re: Australian Stations - January 2020

Todd
 

The Australian ACMA website has a list of pending AM to FM conversions. Quite a few stations will go forever such as recently departed 918 KHz Cooma.

Time to record these AM stations while they remain on air. 

https://www.acma.gov.au/am-fm-conversions

Pending AM to FM Conversions:

State Markets
New South Wales

Armidale

Grafton

Gunnedah

Inverell

Lismore

Lithgow

Moree

Nowra

Parkes

Tamworth

Taree

Young

Victoria Wangaratta
Western Australia Albany


DX500 - 20/1/2020 - 24/1/2020

Paul Blundell
 


Re: Australian Stations - January 2020

Paul Blundell
 

Great list. I will keep an ear out for them.


On Sat, 25 Jan 2020, 11:11 a.m. Todd via Groups.Io, <toddemslie=yahoo.com.au@groups.io> wrote:
More Australian MW stations have permanently switched off. This opens up more clear frequencies for Australian DXers.

I hope they switch off my local 1539 KHz Rete Italia Sydney transmitter. This channel has been blocked for years..

The following Rete Italia network MW stations have permanently closed:

657 Perth.
801 Gosford.
1575 Wollongong.
1593 Melbourne.
1611 Darwin.
1611 Devonport.
1611 Esperance.
1611 Hobart.
1611 Kalgoorlie.
1611 Launceston.
1611 Mackay.
1611 Rockhampton.
1611 Gladestone.
1620 Gold Coast.
1620 Toowoomba.
1620 Wangaratta.
1629 Albany.
1629 Mt Gambier.
1638 Canberra.

Reports indicate that new Australia car tuners no longer include AM. Only FM, and high VHF Digital.

999 KHz 2ST Nowra and 1134 2AD Armidale are planning to switch off and move to FM.

Regards,

Todd
Sydney, AU

PS: This web page list is older, hence some more stations have switched off since then. The above list has been confirmed by DXers.

https://ilglobo.com.au/news/44716/changes-to-rete-italia/


--
Paul - Moderator
UltralightDX


Re: 2019 Shootout?

Paul Blundell
 

Thanks Gary, that was a good read 


On Sat, 25 Jan 2020, 12:58 a.m. Gary DeBock via Groups.Io, <D1028Gary=aol.com@groups.io> wrote:
On Thu, Jan 23, 2020 at 07:25 PM, Paul Blundell wrote:
As a side note, I am a big fan of the Digitech AR-1733 which can be easily found in Jaycar stores locally.
Paul,

The Digitech AR-1733 (and the identical Japanese market Elpa ER-C57WR) are actually predecessors to the C.Crane Skywave model (which was introduced late in 2014), made by the Redsun company in China. C.Crane used it as a starting point for the completely redesigned Skywave, since Redsun had already been C.Crane's manufacturer in China for an extended period. The CC Skywave does have some improvements over these earlier Redsun-manufactured models, as explained by Mike Schuster in his excellent review posted on Amazon, which is pasted below. Mike's Skywave review was written about a month before my own Skywave review in the 2015 Ultralight Radio Shootout.

Gary DeBock (in Puyallup, WA, USA)

Pasted from Mike's review of the CC Skywave on Amazon (December 2014) :
I'm surprised that, after all the buzz about this radio on hobbyist websites and blogs, nobody has posted about it here. So I'm giving a quick overview as I await my second Skywave Radio (having ordered the first one directly from CCrane and decided that this one is "keeper")

This is the official update to the well-regarded CCrane shortwave portable (SWP) which is still for sale; both having been sourced from Redsun in China. It is also a re-work of an intermediate Redsun model not sold in the US, but known in Australia as the Digitech AR-1733 and in Japan as the Elpa ER-C57WR.

The radio covers MW/SW/FM and the aircraft band (omitting LW that previous models covered). It appears to use DSP (digital signal processing) technology like many newer models sourced from Tecsun in China and sold under various brands including Kaito, Grundig, etc. Such radios achieve pretty exceptional performance using a minimum of electrical components because the SiLabs DSP chip does most of the traditional RF stuff right inside. However, all have suffered from various design or performance compromises including uneven sensitivity, unwanted noises, and the implementation of the SiLab chips "soft mute function" which enraged DXers because, rather than amplifying weak MW/SW signals actually does the opposite; making them "fall off the cliff" once signal strength goes below a cutoff.

The Ccrane SWP was a more traditional PLL/superhet design that was well conceived except for an occasional annoying design flaw: a digital up/down volume adjustment in lieu of a traditional knob; it powered up too loud, had steps that were too coarse to get the volume right, and you could not lower the volume enough to make for comfortable listening through headphones. The AR-1733 which is the immediate predecessor to this model, has serious performance issues on MW.

The designers of Skywave appear to have taken all of this in; perhaps that is why the release of the radio was delayed so many times. In using it side by side with older models, all the good points stand out. Sensitivity is remarkably good, especially on MW where strong AGC action and excellent useable sensitivity gives great volume even from daytime fringe stations - comparable to larger sets like the PL-660 for instance. Volume control is once again handled using a traditional analog knob. All 5 of the SiLabs "virtual filter" bandwidth settings are implemented (6 - 4 - 3 - 2 -1 KHz) and work very well. The odd tones and artifacts of previous DSP designs are mostly gone. I cannot detect any evidence of "soft-mute" being activated. In fact, the overall "feel" and sound of the Skywave reminds one of all the best points of PLL/superhet sets of a few years back (e.g. Tecsun PL-200/Eton E100, etc). Also for me, where many radios suffer bleed-through of strong MW signals all over the place, the front-end selectivity of this radio is admirably good.

Compared to Tecsun DSP sets some differences stand out. There is no digital signal strength display, only a bar graph. The sound from the speaker is rather tinny (even with the "hidden" audio tone control set to "music"). There is no direct control over the dial light. A nice feature that the AR-1733 had (ability to lock the tuning wheel - only) is not carried over. Also many have criticized the lack of SSB capability; not an issue of size really (ages ago, the even smaller Sony ICF-SW100 implemented SSB as well as synchronous AM) but perhaps cost and the capabilities of the available DSP chips.
224 people found this helpful
 
 
toggle quoted messageShow quoted text


--
Paul - Moderator
UltralightDX

3681 - 3700 of 32865