[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: Popularity of 2m I.F.



Rich Dailey, KA8OKH wrote:
> 
> Was on the phone with a good friend the other day,  extolling the
> virtues of ao-40 (of course).  He has always been interested in
> satellite communications,  and is real receptive to the idea of getting
> a mode S downlink setup running.  But he posed a question that I had
> no clear answer for - "Why does everybody want to use 2m as an I.F.,
> given the proliferation of good used hf radios?  Why not use 10m?
> 
> So,  what should I tell him?
> 
> tu de Rich
> 
> -------------
> Rich Dailey, KA8OKH - Phyllis Dailey, KB4NPI
> mailto:okh.npi@gte.net
> http://home1.gte.net/web22jfw/
> -------------
> ----
> Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
Hi Rich

The image noise is bad enough on 144 let alone 30Mhz when using 2400
receive convertors. Rule of thumb would suggest 10% of operating
frequency for first IF ie why not 220Mhz??

Cheers and 73 

Dave C ZL2MQ
----
Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org



AMSAT Top AMSAT Home