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Thread-Index: AQHO+qNcmdG1/e2InEOVSjDmLqgh6ZpXS4MAgAAehH4= Date: Mon, 16 Dec 2013 22:44:37 +0000 Message-ID: <7E7DFBB4D102A04DB5ADC88D66628A4A0FCBCA99@ICTS-S-MBX1.luna.kuleuven.be> References: <7E7DFBB4D102A04DB5ADC88D66628A4A0FCBCA60@ICTS-S-MBX1.luna.kuleuven.be>,<52AF758C.4060609@iup.uni-heidelberg.de> In-Reply-To: <52AF758C.4060609@iup.uni-heidelberg.de> Accept-Language: nl-BE, en-GB, en-US Content-Language: nl-BE X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.112.13.11] MIME-Version: 1.0 X-HELO-Warning: Remote host 134.58.240.129 (rhcavuit01.kulnet.kuleuven.be) used invalid HELO/EHLO cavuit01.kulnet.kuleuven.be - verification failed X-Spam-Score: -1.2 (-) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: HI Stefan, 600m or 630m, actually I don't care. I just wanted to state that there are valid reasons to call it 600m. [...] Content analysis details: (-1.2 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [134.58.240.129 listed in list.dnswl.org] -0.5 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: d2180dc2ab86baf139677702972e08e3 Subject: RE: LF: 600m or 630m ? Content-Type: multipart/alternative; boundary="_000_7E7DFBB4D102A04DB5ADC88D66628A4A0FCBCA99ICTSSMBX1lunaku_" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,HTML_MESSAGE, TO_ADDRESS_EQ_REAL autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Status: O X-Status: X-Keywords: X-UID: 1329 --_000_7E7DFBB4D102A04DB5ADC88D66628A4A0FCBCA99ICTSSMBX1lunaku_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable HI Stefan, 600m or 630m, actually I don't care. I just wanted to state that there are valid reasons to call it 600m. Maybe I will call it the 631m band, because I like primes ;-) 73, Rik ON7YD - OR7T ________________________________ Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org= ] namens Stefan Sch=E4fer [Stefan.Schaefer@iup.uni-heidelberg.de] Verzonden: maandag 16 december 2013 22:50 Aan: rsgb_lf_group@blacksheep.org Onderwerp: Re: LF: 600m or 630m ? Hi Rik, Am 16.12.2013 22:11, schrieb Rik Strobbe: Hi Stefan, the 40 meter band is from 7.0MHz (=3D 42.86m) to 7.2 (=3D 41.67m). The 'err= or' is 7,2% at the lower band end and 4.2% at the upper band end. For 20m it is about the same: the band is 14.00-14.35MHz while 20m =3D 15MH= z. In fact, on HF there are only 2 bands where the wavelength is is named afte= r is within the band (160m and 80m). I think there are some reasons for the names of the bands. One thing is tha= t there is a 41m BCD radio band (at a even higher frequency!?!) and the rad= io amateurs want to give their band a different name. Furthermore the names= of the bands help to understand the dependency of the wave length (160 =3D= 2x80, 80=3D2x40, 40=3D2x20 and so on) and help to explain why i.e. a Zepp = antenna of about 40m length can be used on the 80m and 40m and 20m and 10m = band... If we call 472-479kHz (=3D 635,6m - 626.3m) the 600m band the 'error' is 5.= 9% at the lower band end and 4.4% at the upper band end. So for me there is no problem in going for a round number, as we do for mos= t other bands. 630m is also a round number. Otherwise we should call the 160m band the 200= m band (?). And, would it be a problem for you to call it the 630m band? And if so, why= ? 73, Stefan 73, Rik ON7YD - OR7T ________________________________ Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org] namens Stefan Sch=E4fer [Stefan.Schaefer@iup.uni-heidelberg.de= ] Verzonden: maandag 16 december 2013 21:41 Aan: rsgb_lf_group@blacksheep.org Onderwerp: Re: LF: Monitor: 50SM77 Loc KO85SP Frequency: 0.477 MHz (600m) G.. > Frequency: 0.477 MHz (600m) Lambda =3D c / f =3D (299792458*m/s) / (477000*1/s) =3D 628.496m ~ 630m. :-) 73, Stefan/DK7FC --_000_7E7DFBB4D102A04DB5ADC88D66628A4A0FCBCA99ICTSSMBX1lunaku_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

HI Stefan,

 

600m or 630m, actually I don't care.

I just wanted to state that there are valid reasons to call it 600m.

Maybe I will call it the 631m band, because I like primes ;-)

 

73, Rik  ON7YD - OR7T

 

Van: owner-rsgb_lf_group@blacksheep.org [o= wner-rsgb_lf_group@blacksheep.org] namens Stefan Sch=E4fer [Stefan.Schaefer= @iup.uni-heidelberg.de]
Verzonden: maandag 16 december 2013 22:50
Aan: rsgb_lf_group@blacksheep.org
Onderwerp: Re: LF: 600m or 630m ?

Hi Rik,

Am 16.12.2013 22:11, schrieb Rik Strobbe:

Hi Stefan,

 

the 40 meter band is from 7.0MHz (=3D 42.86m) to 7.2 (=3D 41.67m). = The 'error' is 7,2% at the lower band end and 4.2% at the upper band end.

For 20m it is about the same: the band is 14.00-14.35MHz while 20m =3D 1= 5MHz.

In fact, on HF there are only 2 bands where the wavelength is is named a= fter is within the band (160m and 80m).

I think there are some reasons for the names of the bands. One thing is tha= t there is a 41m BCD radio band (at a even higher frequency!?!) and the rad= io amateurs want to give their band a different name. Furthermore the names= of the bands help to understand the dependency of the wave length (160 =3D 2x80, 80=3D2x40, 40=3D2x20 and = so on) and help to explain why i.e. a Zepp antenna of about 40m length can = be used on the 80m and 40m and 20m and 10m band...

 

If we call 472-479kHz (=3D 635,6m - 626.3m) the 600m band the 'erro= r' is 5.9% at the lower band end and 4.4% at the upper band end.

 

So for me there is no problem in going for a round number, as we do for = most other bands.

630m is also a round number. Otherwise we should call the 160m band the 200= m band (?).
And, would it be a problem for you to call it the 630m band? And if so, why= ?

73, Stefan

 

73, Rik  ON7YD - OR7T

 

 

Van: owner-rsgb_lf_group@blacksheep.org [own= er-rsgb_lf_group@blacksheep.org] namens Stefan Sch=E4fer [Stefan.Schaefer@iup.uni-heidelberg.de]
Verzonden: maandag 16 december 2013 21:41
Aan: rsgb_lf_group@blacksheep.org
Onderwerp: Re: LF: Monitor: 50SM77 Loc KO85SP Frequency: 0.477 MHz (= 600m)

G..

> Frequency: 0.477 MHz (600m)

Lambda =3D c / f =3D (299792458*m/s) / (477000*1/s) =3D 628.496m ~ 630m.

:-)

73, Stefan/DK7FC


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