[50mhz] 4 MTR BAND and RC Control

[N7KA at comcast.net]

Search of radio control frequencies for model aircraft brought interestng results.  I looked at USA, UK, and other countries.  The USA does things differenltly than EU countries. They mostly use lower bands like 35MHz, and others, for RC.  In USA we use the lower 70"s for RC channels plus some others.  Japan is different agian.  Looking at a good number of countries and you get one mixed up mess, but luckily a lot are separated by oceans.  I can imagine an international RC aircraft competition with all the different bands used. 



A 4M ham band does not seem to be possible in the USA.  I wonder how much of a problem using RC on 6M has produced.  How many know those frequencies?  And with 6M becoming more popular its very conceivable problems will turn up.  AN RC TX would only cause QRM for us, however , as someone stated, if we interfere with a RC RX that model becomes an out of control rocket.  MY self I would NOT even consider 6M for RC control.  I have seen some verhy effective freq control techniques when several models are being flown at the same time.  Let leave 70MHz to the RC guys.  Use of controlled radio frequencies for hobbies and pleasures helps us to maintain our frequency allocations. There is support in the numbers.  Its like combining 4X4, ATV, Motorbikes and mountian bikes into one group for support of off road activities. 



Maybe we should look more at 222MHz, a band we currently have available to us.  WIth a borrowed radio I made 2 QSOs on 222MHz  to g ive  friends a QSO in a contest.   



The RC'ers and amateurs must support each other. 



Arne N7KA 




----- Original Message ----- 
From: "Michael Keane K1MK" <k1mk at alum.mit.edu> 
To: 6meter at yahoogroups.com 
Cc: 50mhz at mailman.qth.net, microwave at echo.valinet.com 
Sent: Monday, May 18, 2009 4:41:34 PM GMT +00:00 Monrovia 
Subject: Re: [50mhz] [6 Meter Sked] RE: [Mw] TV Channels 2-6 Post Transition 

On 5/17/2009 11:39 PM, Chris Boone wrote: 
> AINT GONNA HAPPEN!!! 
> 
> 6 is not 4m....and 4 and 5 TV still have plenty of DTV assignments, AND to 
> correct the numbers, DTV5 has the fewest of stations left AFTER 6/12 with 4 
> or 5 iirc, NOT DTV 6 (which has more than 2 allocated/licensed on it..dont 
> know where you got that info!!! BUT its WRONG!!).. 

Well, according to the FCC's list at 
<http://www.dtv.gov/FULL_POWER_STATIONS_LIST.xls> there will be two 
"full-power"  DTV stations (WISE-TV in Ft. Wayne, IN and KSNB-TV in 
Lincoln, NE) remaining on Channel 4 after June 12. 

So that's two stations coincident with the IARU R1 4m band (70.0-70.5 
MHz). Perhaps the FCC isn't posting accurate and current information on 
its consumer website, but ... 

OTOH, it is quite true that many (205) low-power, Class A, and TV 
translator stations will remain on Channel 4 after June 12. Each of 
those would need to be adequately protected; and it would not be as 
simple as specifying a couple of geographic restrictions for amateur 
operation. 

An even bigger hurdle that any petition would have to overcome is 
addressing the concern for interference from amateur operation on 4m to 
TV interface devices such as VCRs, DVDs, DVRs, satellite and cable boxes 
that have their outputs on Channel 4. 

Preventing direct pickup interference to poorly-shielded consumer 
devices was the FCC's rationale for excluding Channels 3 & 4 from use by 
unlicensed, low power TV band devices in the television "white spaces" 
docket. 

Trans-Atlantic 6m/4m crossband contacts have been completed. Perhaps 
some very limited operations under an experimental license such as the 
ongoing 500 kHz tests might be possible. But, I really can't see a 
secondary amateur radio allocation at 4m in the cards, at least not 
anytime soon. 

73, 
Mike K1MK 



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