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RE: LF: 600m or 630m ?

To: "[email protected]" <[email protected]>
Subject: RE: LF: 600m or 630m ?
From: Rik Strobbe <[email protected]>
Date: Mon, 16 Dec 2013 22:44:37 +0000
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Thread-topic: LF: 600m or 630m ?

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: [email protected] [[email protected]] namens Stefan Schäfer [[email protected]]
Verzonden: maandag 16 december 2013 22:50
Aan: [email protected]
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 (= 42.86m) to 7.2 (= 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 = 15MHz.

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

I think there are some reasons for the names of the bands. One thing is that there is a 41m BCD radio band (at a even higher frequency!?!) and the radio 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 = 2x80, 80=2x40, 40=2x20 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 (= 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 most other bands.

630m is also a round number. Otherwise we should call the 160m band the 200m 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: [email protected] [[email protected]] namens Stefan Schäfer [[email protected]]
Verzonden: maandag 16 december 2013 21:41
Aan: [email protected]
Onderwerp: Re: LF: Monitor: 50SM77 Loc KO85SP Frequency: 0.477 MHz (600m)

G..

> Frequency: 0.477 MHz (600m)

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

:-)

73, Stefan/DK7FC


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