[Elecraft] [K3] K3, P3E, Transverters (Satellites)

[Samuel Strongin]

  Rubbish I run all my transverters and power amps right through 3456Mhz in 
the shack with great results , On 3456 a single loop yagi has 112 elements 
is 12 feet long and has about 23dbm gain with mast mount preampsresults are 
excellent. More important is the correct installation of connectors to keep 
loss to a minimum. Try putting a 200 watt 2304 amp on the tower,ain't going 
to happen.
                              73 kf4yox
----- Original Message ----- 
From: "Lyle Johnson" <kk7p at wavecable.com>
To: "michael taylor" <mctylr at gmail.com>
Cc: "Elecraft" <elecraft at mailman.qth.net>
Sent: Monday, October 29, 2007 4:14 PM
Subject: Re: [Elecraft] [K3] K3, P3E, Transverters (Satellites)


>> Maybe wait for future K3 VHF/UHF modules?
>> Perhaps a KM1 weak signals oriented (CW, SSB) DSP based VHF to
>> microwave transceiver? Maybe vaguely similar to Bob W7PUA's DSP-10 2m
>> SDR/DSP transceiver. :-)
>
> One of the problems with gear for 900 MHz and higher is that you really 
> want the RF deck mounted at the antenna, if possible.  A weatherproof 
> transverter, if you will.  Feedlines affordable to most of us have too 
> much loss.  AN alternative is to remote a preamp and power amp, and let 
> the feedline loss attenuate the Tx output of the shack-based exciter to 
> the drive level needed by the power amp at the antenna.
>
> With satellites, you often have a situation where you only want/need a Tx 
> or an Rx converter.  L band for satellites in the Amateur Service are 
> restricted to 1268-1270 MHz, uplink (transmit) only.  Until now, S-band 
> (2.4 GHz) has been downlink (receive) only.  So traditional transverters 
> may not be the most cost effective solution.  For VHF/UHF this is not the 
> case, where 2m and 70cm are used for both up- and downlink and feedline 
> losses are manageable (even if the antennas aren't!).
>
> Another consideration is full duplex operation for satellites, which 
> suggests you want different IFs for Tx and Rx.  Finally, you probably want 
> VHF IFs for microwave operation for image rejection if nothing else.
>
> 73,
>
> Lyle KK7P
>
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