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Re: LF: OPERA overload?

To: <[email protected]>
Subject: Re: LF: OPERA overload?
From: "Graham" <[email protected]>
Date: Fri, 20 Dec 2013 20:17:45 -0000
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10000s of crashed air planes due to NDB interference
 
Funny  you  should  mention  that  , the  band  is  not  as
big as  it first seam's
 
NDB   Rx are  standard  AM pass  band , some  TRF with  carrier
amplifiers , the  Null is derived  from the  carrier and  anything
inside the  pass  band  will  introduce , errors in the  bearing
or prevent a  resolve ,errors will be  compounded  by the  jammer / main beacon
distance , if the  beacon is  500 miles on and the  A/C directly over head
then a  1 mW  signal will  effectively  jam the  system  
 
120 second  tx  could  give  the  wrong  heading  for  a 
10 mile  distance
 
As the  system is not  tactical , there are no  anti jamming provisions
there is  no carrier  phase  modulation , rotation or  frequency shift
, the  null  is  simply  amplitude , provided  by  a loop Ae and
sense , automation  is  confined to  carrier  / sense  switching
 
Odd allocation really ?
 
G,
 
 

Sent: Friday, December 20, 2013 6:28 PM
Subject: Re: LF: OPERA overload?

Hello Bob,

Am 20.12.2013 18:54, schrieb Bob Raide:
G et all;
Things have changed over this pasted year or so.  Many more new stations have come on and these newbies are running lower power and RXers that may not be up to what some of the veteran ops are using.  There really isn't allot of room for QRO in the 630 meter band

Do you get complaints? What is the argumentation? What do they say? Same as here? 10000s of crashed air planes due to NDB interference? Overloaded RX because your signal is 30 dB above the noise in 1 Hz NBW?
One day the A-Team will come and shoot down the antenna and PA, http://www.youtube.com/watch?v=_MVonyVSQoM ;-)
Or is it maybe just envy, sometimes?
I assume Jay doesn't see a problem when you go QRO sometimes, like Markus doesn't when i do. And i do not when Markus does or DK6SX/p on MF or DK2DB. It's just all fine :-)

73, Stefan/DK7FC


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