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LF: RE: Japan on 475 kHz.

To: <[email protected]>
Subject: LF: RE: Japan on 475 kHz.
From: "Hideho YAMAMURA" <[email protected]>
Date: Sun, 21 Dec 2014 21:20:37 +0900
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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.

there are following conditions (I think, first announced on Oct.10):
(1) there are no house or office within 200m radius,
    other than owned by the station owner.
(2) OR, agreements are obtained from the houses or offices within the 200m.
(3) on site test will be conducted before permission. ("for some time" they 

It seems that the officials have concerns on QRM to MF broadcast signals,
like 936kHz, 945 kHz, 954 kHz... the 2nd harmonic
and/or 1413 kHz, 1422 kHz, 1440 kHz... the 3rd harmonics.

Several stations are preparing LPF,
and are finding/found places for the on site test, as portable stations.
There is hot discussion on these on the internet in JA.

I would like to know the situations in the already operating stations.
Do you have any BC QRM problem ? (I mean making interference, not receiving),
and what care do you take ? 
LPF, what kind, other means ?
How much is your harmonic attenuation ? or filter attenuation ?
Information highly appreciated,

BTW, I myself, is not prepared for 630m, yet.


> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Dimitrios
> Tsifakis
> Sent: Sunday, December 21, 2014 8:26 AM
> To: [email protected]
> Subject: LF: Japan on 475 kHz.
> Hello group,
> I have received an email from a friend in Japan informing me that Japanese
> amateurs gain access to 630 m from 05/Jan/2015. There are some restrictions
> on power and vicinity to other houses. Does anyone have more information
> on this?
> 73, Dimitris VK1SV

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