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Re: Popularity of 2m I.F.



Its a matter of cost. With a 28 MHz IF, the image frequency would be only 56
MHz away. The RF filter required to reject the image would be larger, more
expensive to make, and require test equipment to adjust. With a 144 MHz IF,
the filter can be printed on the PCB and requires no adjustment.

73,

John
KD6OZH

----- Original Message -----
From: "Rich Dailey, KA8OKH" <okh.npi@gte.net>
To: <amsat-bb@AMSAT.Org>
Sent: Wednesday, 30 May 2001 02:21 UTC
Subject: [amsat-bb] Popularity of 2m I.F.


>
> 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

----
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