[amsat-bb] Re: Is there anyway to get a linear transponder on the ISS?

M5AKA m5aka at yahoo.co.uk
Fri May 31 12:03:29 PDT 2013

--- On Fri, 31/5/13, Raydel Abreu Espinet <cm2esp at frcuba.co.cu> wrote:
> The nicest configuration for a system
> great and easy for everyone, including both small low budget
> stations and pro stations would be a 2m FM uplink with CTCSS
> to avoid interference and a SSB 10m downlink. 

I like the idea, but I'm not keen on using CTCSS. The reason is CTCSS makes it impossible to identify sources of interference. 

With CTCSS you still need to run high power in-order to overcome the interference but you never know what the interference is or which country it might be coming from. This means nothing will ever be done about the interference and illegal use of Amateur primary spectrum will only increase.

Far better to have open FM transponders with no CTCSS.

73 Trevor M5AKA

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