[amsat-bb] RE: Dual Helix antenna and Notch Filters

[Tony Langdon <tlangdon@xxxxxxxxxxxxxxxxxx>]

Sounds good. :-)  I'll havce a look.

Tony Langdon. 
Systems Development and Support. 
ATC Training Australasia.  Level 2 321 Exhibition St Melbourne  3000. 
Phone:  1300 13 1983     WWW:  http://www.atctraining.com.au 



> -----Original Message-----
> From: Charles Suckling [mailto:csuckling@nhlab.demon.co.uk]
> Sent: Friday, 1 June 2001 2:45
> To: tlangdon@atctraining.com.au
> Cc: amsat-bb@AMSAT.Org
> Subject: Dual Helix antenna and Notch Filters
> 
> 
> Tony
> 
> I measured the performance of the notch filters today.  The 
> RX filter has a
> 47dB notch at 1269 and a through loss of less than 0.15dB, 
> while the TX
> filter has a 51dB notch at 2401 with a through loss of about 
> 0.1dB. Photos
> of these and the antenna are now on my website at 
www.g3wdg.free-online.co.uk.

73

Charlie
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