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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Re\:\s+Japan\s+on\s+475\s+kHz\.\s*$/: 20 ]

Total 20 documents matching your query.

1. LF: RE: Japan on 475 kHz. (score: 1)
Author: "Hideho YAMAMURA" <>
Date: Sun, 21 Dec 2014 21:20:37 +0900
Dimitris and all LF/MF, Yes, in JA, 630m will be permitted at EIRP 1Wmax., effective Jan.05, 2015. Official Directive was published on Dec.17, 2014. however, there are following conditions (I think,
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00192.html (11,814 bytes)

2. Re: LF: RE: Japan on 475 kHz. (score: 1)
Author: pa3abk <>
Date: Sun, 21 Dec 2014 15:41:56 +0100
Dear Hideho, Assume in JP MF BCST stations are also likely to disappear. In NL it's expected that all MF station will be QRT within a year or 2. But NL is rather small and the internetconnections are
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00194.html (13,285 bytes)

3. RE: LF: RE: Japan on 475 kHz. (score: 1)
Author: "Hideho YAMAMURA" <>
Date: Mon, 22 Dec 2014 00:26:36 +0900
Dear Jan, Thank you for your reply. Never heard of that move in JA. I guess, AM BCs' value is appreciated, after the earthquake and Tsunami disaster in 2011. NDBs are disappearing, but that's another
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00195.html (15,958 bytes)

4. Re: LF: RE: Japan on 475 kHz. (score: 1)
Author: DK7FC <>
Date: Sun, 21 Dec 2014 23:40:00 +0100
Hello Hideho, Wow, congrats for getting the new band! Hope there will be never ending activity on the band. Unfortunately it is not so likely to make QSOs between DL and JA on 630m but maybe some QRS
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00203.html (13,185 bytes)

5. Re: LF: RE: Japan on 475 kHz. (score: 1)
Author: Dimitrios Tsifakis <>
Date: Mon, 22 Dec 2014 10:57:44 +1100
Hi Hideho san, Thank you for the update. I am glad to hear that even though you have all these tough restrictions, Japanese amateurs are planning portable operations in the new band! I have not heard
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00207.html (11,962 bytes)

6. LF: Re: Japan on 475 kHz. (score: 1)
Author: "mal hamilton" <>
Date: Mon, 22 Dec 2014 17:08:52 +0100
Hi all Over the years I have worked many JA stns on 160 metres CW and look forward to doing the same on 630 metres Propagation on both MF BANDS similar de MAL/G3KEV Hi Hideho san, Thank you for the u
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00213.html (12,367 bytes)

7. Re: LF: Re: Japan on 475 kHz. (score: 1)
Author: Guyé André <>
Date: Mon, 22 Dec 2014 17:17:54 +0100
HI Mal. The same here, I have worked on 160m CW more than 100 different JA calls, especially in the beginning when they was allowed only on the short segment 1907.5 to 1912.5 kHz (from the 1991 year
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00214.html (13,781 bytes)

8. Re: LF: Re: Japan on 475 kHz. (score: 1)
Author: DK7FC <>
Date: Mon, 22 Dec 2014 18:31:24 +0100
Am 22.12.2014 17:17, schrieb Guyé André: [...]   I agree with you, Mal. For DX, the Propagation on both MF BANDS 160 and 630 meters similar. The only diference is the ERP power, because on 630 m the
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00216.html (13,451 bytes)

9. LF: Re: Japan on 475 kHz. (score: 1)
Author: "mal hamilton" <>
Date: Mon, 22 Dec 2014 20:55:05 +0100
Andy It is certainly possible with good antennas at each end, skilled CW operators and suitable propagation with the appropriate EIRP QRSS 10 should also do the trick !! 73 ES GL DE MAL/G3KEV From: a
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00218.html (15,295 bytes)

10. RE: LF: Re: Japan on 475 kHz. (score: 1)
Author: Rik Strobbe <>
Date: Mon, 22 Dec 2014 19:47:02 +0000
Stefan, some patience might help. Wait for the next sunspot minimum. In 2008 transatlantic WSPR was very common, even for stations with just some 100 mW ERP. 73, Rik ON7YD Van:
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00219.html (14,125 bytes)

11. LF: Re: Japan on 475 kHz. (score: 1)
Author: "mal hamilton" <>
Date: Mon, 22 Dec 2014 20:59:15 +0100
Stefan MF is not for the NOVICE and do not believe everything you hear mal/g3kev From: DK7FC Sent: Monday, December 22, 2014 5:31 PM To: rsgb_lf_gr
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00220.html (13,886 bytes)

12. Re: LF: Re: Japan on 475 kHz. (score: 1)
Author: DK7FC <>
Date: Mon, 22 Dec 2014 22:55:49 +0100
Hi Rik, But we're talking about EU <-> JA, not EU<-> US_west_coast. A little little difference on 630m, apart from the absolute distances. And if i have to wait for the next sun spot minimum, then pr
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00221.html (15,573 bytes)

13. RE: LF: Re: Japan on 475 kHz. (score: 1)
Author: Rik Strobbe <>
Date: Mon, 22 Dec 2014 22:40:20 +0000
Hi Stefan, I wasn't saying that propagation on 472kHz is the same as on 1800kHz. For sure it isn't. Just that the current winter condx are far worse than the 2008-2009 season was, when lots of EU WSP
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00223.html (16,277 bytes)

14. RE: LF: RE: Japan on 475 kHz. (score: 1)
Author: "Hideho YAMAMURA" <>
Date: Tue, 23 Dec 2014 09:08:50 +0900
Dimitris, Nice that you don't hear complaints. That's nice. My quick calculation resulted in -120dBc necessary, to reduce QRM to adjacent houses, (I may be wrong)., and I am thinking how to make it.
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00224.html (14,077 bytes)

15. RE: LF: RE: Japan on 475 kHz. (score: 1)
Author: "Hideho YAMAMURA" <>
Date: Tue, 23 Dec 2014 09:23:41 +0900
Stefan, Thank you for the diagram, nice picture, and that you don't have complaints You have a BPF. It should help a lot, for low harmonics. And your TX is very compact. I was impressed. I hope so. 7
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00225.html (13,418 bytes)

16. Re: LF: RE: Japan on 475 kHz. (score: 1)
Author: Dimitrios Tsifakis <>
Date: Tue, 23 Dec 2014 12:58:02 +1100
Hi Hideho san, In Australia, for frequencies below 30 MHz we need to reduce our harmonics by the lesser of: 1) 43 db + 10*log(PEP) 2) 50 dB where PEP is peak power to the antenna. When I was allocate
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00226.html (12,152 bytes)

17. Re: LF: RE: Japan on 475 kHz. (score: 1)
Author: Laurence KL7 L <>
Date: Mon, 22 Dec 2014 17:05:35 -0900
Im hoping that with lower flux in the coming years it will be possible - certainly a few Eu stations have made to the far East coast of China (and further South) in past years so I think even with re
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00227.html (14,006 bytes)

18. RE: LF: RE: Japan on 475 kHz. (score: 1)
Author: "Hideho YAMAMURA" <>
Date: Tue, 23 Dec 2014 12:25:21 +0900
Hello Dimitris-san, we have the same regulation (with grace period now), but, it seems that the ministry was afraid of the actual interference, hence, on site test. In my quick calculation, I assumed
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00228.html (13,611 bytes)

19. Re: LF: RE: Japan on 475 kHz. (score: 1)
Author: Dimitrios Tsifakis <>
Date: Tue, 23 Dec 2014 15:46:30 +1100
Hi Hideo san, On VHF and higher frequencies, the harmonics need to be -70 dBc. Conceivably, a 50 MHz transmitter harmonic could land on an FM BC station's frequency so this is the same problem as whe
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00229.html (13,547 bytes)

20. Re: LF: RE: Japan on 475 kHz. (score: 1)
Author: DK7FC <>
Date: Tue, 23 Dec 2014 14:03:20 +0100
Hi Laurence, JA to AK will be an interesting path and here regular detections will be possible, i guess. However, with 1W it will also be VERY rare i think. About WSPR-15 on MF, so far we didn't real
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00232.html (16,989 bytes)


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