[amsat-bb] Re: Full band transverters for satellite operations?

John B. Stephensen kd6ozh at comcast.net
Tue Jun 12 11:51:33 PDT 2007

I haven't seen anything other than transverters with 2 switchable crystals. 
However, one manufacturer has suggested recrystalling for a 24-30 MHz IF.



----- Original Message ----- 
From: "Alan P. Biddle" <APBIDDLE at mailaps.org>
To: "AMSAT-BB" <amsat-bb at amsat.org>
Sent: Tuesday, June 12, 2007 14:47 UTC
Subject: [amsat-bb] Full band transverters for satellite operations?

> With the advent of rigs like the FLEX-5000, features are becoming 
> available
> which exist in no traditional rig.  However, for operation on VHF, UHF, 
> and
> microwave frequencies, you are obviously going to need a transverter. 
> Using
> a 28-30 MHz IF, you can cover 2 meters with 2 LO crystals.  However, once
> you get to 70 cm, it would take 15 crystals to do this.  Now admittedly, 
> you
> wouldn't necessarily want to cover the entire band, as an FT-847, TS-2000,
> etc do.  But you would want more flexibility than just one or two 2 MHz
> segments for both space and terrestrial operations.  More if you wanted to
> include basic FM repeaters.
> Given that there are no (?) transverters which have a 20-30 MHz IF width,
> has anyone seen a transverter with a tunable IF, instead of crystals?  Or
> alternatively, a VFO-like "VLO" which could be plugged into the 
> transverter
> crystal socket, or something equivalent?  There used to be such VFOs for
> crystal rigs 3-40 years ago.  I doubt that a transverter would maintain 
> full
> specs over a wide range, but such flexibility would be handy.  Perhaps 
> this
> is a solved problem with the microwave community?
> Alan
> -----------------------------------
> Before a mad scientist goes mad, there's probably a
> time when he's only partially mad.  And this is the time
> when he's going to throw his best parties.
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb 

More information about the AMSAT-BB mailing list