(meteorobs) Meteors heard on Digital & analogue TV

[bob alongi]

Michael - Looks like you have had some good luck on catching radio meteors. I am however curious about your notch filter. What make /model# is it? How do you tune the narrow filter so accurately?

Continued good luck in the future,
Bob


--------------------------------------------
On Thu, 6/4/15, Michael Boschat <andromed at dal.ca> wrote:

 Subject: (meteorobs) Meteors heard on Digital & analogue TV
 To: "meteorobs at meteorobs.org" <meteorobs at meteorobs.org>
 Date: Thursday, June 4, 2015, 4:37 AM
 
 
 
  
 
 
 
 
 Morning:
 
 
 
 Well, as we approach the Daylight Arietids/Zeta Persieds,
 I took a couple hours from 4am to 6am messing with my
 
 
 Icom R-20 radio to find some backup frequencies, as I am
 monitoring 82.3101 MHz supposed to be Ch. 6 Digital
 carrier.
 
 
 
 I have to use a notch filter to reduce other noise about.
 Here is what I use:
 
 
 
 Antenna Direction: Horizontally polarized with lobes in
 E-W plane, elev 10 deg
 
 Filter  : high-Q (Q at least 300) bandpass filter
 between antenna &  receiver.
 
 Listening Mode: CW
 
 
 
 
 
 
 
 
  So, my results: VC = Video Carrier, DC = digital
 carrier
 
 
 
 
 
 1)   Ch.2  - VC = 55.25 MHz - Nothing
 heard
               
  - DC = 54.31 MHz - Nothing heard
 
 
 
 
 
 2)   Ch.3  - VC = 61.25 MHz - tone heard
 only
    
           
 - DC = 60.310 MHz - nothing heard
 
 
 
 
 
 3)  Ch.4  - VC = 67.25 MHz  - strong tone
 and meteors heard
  
          
   - DC = 66.310 MHz - nothing heard.
 
 
 
 
 
 4)  Ch.5  - VC = 77.25 MHz - tone and couple
 meteor heard
               -
 DC = 77.310 MHz - meteor heard
 
 
 
 
 
 5)  Ch.6 - VC - 83.25 MHz - strong tone and meteor
 heard
                   
 - 83.24 MHz - meteors heard
 
 
             -
 DC = 82.3101 MHz - many returns heard!
 
 
 
 
 
 from Ch.7 to 13 just too high, I do get a very strong
 tone Ch. 8 at 180.310!
 
 
 
 So at least I have back up frequencies to use. I'll
 keep checking during meteor showers
 
 on lower frequencies.
 
 
 
  As I type this I am hearing meteors on my regular
 82.3101 MHz ...
 
 
 
 
 
 
 
 Clear skies
 
 ----------
 
 Michael Boschat
 
 Halifax Center - Royal Astronomical Society of Canada 
 
 Astronomy page:  http://www.chebucto.ns.ca/~aa063
 
 
 
 
 
 
 
 
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