BBS:      TELESC.NET.BR
Assunto:  Re: SDF
De:       Ed Vance
Data:     Sat, 4 Apr 2026 20:29:07 -0500
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>  LOL.  So we can keep this somewhat on Aviaition (before we get yacked at for
> being off topic...)...

>   I was thinking of a snarky (I believe sarcasm makes the world go round) way
> to not only comment you are using the old Mc/s unit, but said 423Mhz was
> VHF...

>   This made me think of a "discussion" I had at the aviation school I work
> at.  He called the 220Mhz aviation band UHF.  

>   VHF is 30Mhz to 300Mhz
>   UHF is 300Mhz - 3Ghz.

> So 220Mhz would still fall in VHF, though he would bet his life that it was
> part of the UHF spectrum, even when I pointed out that everything on the
> interwebs agreed with me.

> So I went home pondering this, and then looking at it on paper it dawned on
> me what they did, and why they do it.

> "VHF AM Phone" band encompasses 118 - 137 Mhz and is open for CIVILIAN use.
> "UHF AM Phone" avaition encompasses 225Mhz - 400.00Mhz.  Even though 225Mhz
> is clearly in the VHF Range, and is for MILITARY and GOVERNMENT use only.

> They are used VHF and UHF not to deliniate the freq. spectrum, but use.  It
> is much easier to tell someone to GO TO Uniform BLAH BLAH BLAH, they say go
> to VHF hi...   Work load is high, so keep it simple. Since 220 and above are
> probabbly on the same raido, it makes it even simpler.  I don't have to
> rememeber that 220Mhz is on the UHF radio.).

> So we were both right...  He was just coming at it from the operational side
> and I was looking at it from the technical side..

> Rug Rat (Brent Hendricks)
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Yep!, I use Megacycles per second.

I read many years ago that in America the only time Hertz should be used is if
a person touches a 60 Cycle A.C. line.
They will get 60 Hurts per second.
Ed
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