6 meter interference - channel 03

Tue Mar 22 21:48:16 AKST 2005

That's interesting.  I've flown JR equipment exclusively on 53 and 50 
mhz (specifically 53.8 and Ch's 00, 02, & 04) since 1990 all over the 
country with NO hits or glitches.  Not one.  The equipment was a 
mixture of PPM and PCM (mostly the latter), and for the most part 
single conversion ABC&W receivers.  In that time I've lost three 
airplanes, none due to interference.  I lost one due to a bad rx 
battery, one due to a failed switch, and one due to plugging the 
aileron extension into the retract channel and vice versa (don't 
ask... it's a long story).

I switched based on the theory that the fewer people with radios on 
my frequency, the less likely someone could "turn on" and shoot me 
down.  So far, at least in the local club, it's worked (there is no 
one else on my frequency in our club of 100+).

Based on my experience you'd have a hard time convincing me to switch 
back to 72 mhz.

Jerry

>JR does not make any radios on 53MHz.  In fact, Horizon is not 
>recommending any 6 meter radios at this time (their technical 
>people) due to interference.  I was considering changing from 72 to 
>50 but was advised not to do such.  Dwayne
>----- Original Message ----- From: "Atwood, Mark" <atwoodm at paragon-inc.com>
>To: <discussion at nsrca.org>
>Sent: Tuesday, March 22, 2005 3:32 PM
>Subject: RE: 6 meter interference - channel 03
>
>
>Doesn't JR make 53mhz stuff anymore??  I'm on all Airtronics now, but
>all of my JR stuff was on 53.  We did have a local repeater running on
>53.8 which caused us some grief until we figured it out, but as you
>said, it was only a matter of coordinating with the hams.  We stayed of
>53.8 and they were excellent about keeping their equipment in tune.
>
>-M
>
>-----Original Message-----
>From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]
>On Behalf Of Paul Horan
>Sent: Tuesday, March 22, 2005 4:04 PM
>To: discussion at nsrca.org
>Subject: Re: 6 meter interference - channel 03
>
>Bill,
>    I have not tried a set of headphones.  What would I hook them up to
>?
>I do not have a 6 meter rig to monitor the frequency with, I guess that
>is
>one possibility.  Or I could scavange an old receiver, add a diode
>detector
>and put some headphones after that.  My good receivers are pcm and fm.
>    If it is a ham, probably all I have to do is coordinate with him.
>I'm more
>concerned if it is a CBer overmodulating and running a linear.
>    Too bad noone makes any 53 Mhz modules and recievers.
>Thanks,
>Paul
>----- Original Message ----- From: "Bill Glaze" <billglaze at triad.rr.com>
>To: <discussion at nsrca.org>
>Sent: Tuesday, March 22, 2005 2:43 PM
>Subject: Re: 6 meter interference - channel 03
>
>>Interesting.  I wrote earlier today about flying about 300 yds. from a
>
>>2000 ft. antenna.  I flew on 6 meters, until recently (need to get my
>>license renewed), and never had a hit.  Mostly on ham band 04, 03, and
>
>>some on 53.1; I'll have to take a look at my collection of modules and
>
>>see if I have anything below 51 MHz.  Of course, the 50-50.1 custom on
>6
>>meters as a set-aside for CW only, is just a "gentleman's agreement"
>and
>>is not a law.  Still, most seem to abide by it; but there's always a
>guy
>>or 2 that doesn't get the word.  Have you been able to hook up a set
>of
>>headphones to check and see if you can hear anything?
>>
>>Bill Glaze
>>
>>Paul Horan wrote:
>>
>>>Mark,
>>>    What are the frequency allocations for digital tv ?
>>>    I don't think that's what is happening to me but will check into
>it.
>>>Until a couple of years ago I did not have any interference, in the
>last
>>>two years it appears to have been getting worse.  Almost lost my
>>>Prophecy yesterday.
>>>    I am aware of the TV channel 2 problem, when I lived in Houston
>>>the local ch 2 had such bad lower sideband suppression that hits on
>>>6 meters were a way of life.
>>>Thanks,
>>>Paul
>>>----- Original Message ----- From: "Atwood, Mark"
>>><atwoodm at paragon-inc.com>
>>>To: <discussion at nsrca.org>
>>>Sent: Tuesday, March 22, 2005 10:12 AM
>>>Subject: RE: 6 meter interference - channel 03
>>>
>>>>Digital Tv.  Local channel 02 has basically wiped out our 53mhz band
>>>>completely.  The FCC and the station are both aware that they're
>>>>broadcasting outside their boundries, but given the aggressiveness
>with
>>>>which they want Digital TV up and running, the FCC has stated that
>they
>>>>will be lenient for a period of time to get things in order.  The
>>>>station has been forthcoming with admitting that their bleeding
>over,
>>>>but have yet to invest in the equipment needed to prevent it. It'll
>>>>probably be a few years I'm told.
>>>>
>>>>Not sure if the same could be happening to 50mhz...  But that's the
>>>>story on the 53 bands here.
>>>>
>>>>-Mark
>>>>
>>>>-----Original Message-----
>>>>From: discussion-request at nsrca.org
>[mailto:discussion-request at nsrca.org]
>>>>On Behalf Of Paul Horan
>>>>Sent: Tuesday, March 22, 2005 10:31 AM
>>>>To: discussion at nsrca.org
>>>>Subject: 6 meter interference - channel 03
>>>>
>>>>    I am getting interference on Channel 03 , 50.86  Mhz.  The 50 mhz
>
>>>>rc frequencies are in the CW portion 50-50.100 6meters.  My symptoms
>
>>>>were a few holds, plane did no fly smoothly, and 2 failsafes
>>>>- low throttle.
>>>>Any ideas what are the best channels on 6 meters to stay away from
>>>>interference ?  Of course, one
>>>>solution is to go to the regular RC freqs.
>>>>    Any ideas if this interference can be due to some other cause ?
>>>>ThanksPaul Horan
>>>>KC5NF
>>>>AMA 57131
>>>>NSRCA 3606
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>>>
>>
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-- 
___________
Jerry Budd
Budd Engineering
(661) 722-5669 Voice/Fax
(661) 435-0358 Cell Phone
mailto:jerry at buddengineering.com
http://www.buddengineering.com
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