Are there any upconverters from 6 meters to 13cm? Or, from 6m to 23cm?
My equipment for that band gets very little use (10w and a dipole is all I have, and there's not much Es out here in the west). That also solves the problem with the downlink IFs, with 6m being neither of the popular ones.
I did some browsing and Googling, and didn't find anything.
Greg KO6TH
----Original Message Follows---- From: "i8cvs" domenico.i8cvs@tin.it To: "AMSAT-BB" amsat-bb@amsat.org, sco@sco-inc.com Subject: [amsat-bb] Re: S Band UP Date: Fri, 15 Sep 2006 13:03:11 +0200
----- Original Message ----- From: sco@sco-inc.com To: amsat-bb@amsat.org Sent: Friday, September 15, 2006 7:28 AM Subject: [amsat-bb] S Band UP
I now have 2m, 70cm and 2.4ghz antennas for satellites. The radio is a Ft-847 with receive SSB preamps on V and U bands.
I have a BBQ dish with a SSB 2.4 ghz downconverter. That will work fine with P3E (it did with AO-40). Could I still use the same dish for S Band uplink on Eagle?
Hi Les, W4SCO
For the uplink on Eagle you should transmit some where between 2400 to 2450 MHz and as far I know the exact frequency segment has been not yet published.
If the uplink of EAGLE will be made between 2400 to 2402 MHz then to use the same dish of P3E you need a coax relay at your dish with the common port C connected to the feed. The NC contact will be connected to input of your actual S-band downconverter and the NO contact must be connected to your S-band TX amplifier a not easy task if you run a long transmission line because in this case the TX amplifier must be antenna mounted.
Probably to uplink the S-band on EAGLE a separate dish which size depends on your needs is easyer. (look at EaglePedia)
I would need some form of a upconverter
(from 70cm to 2.4 ghz) plus a amp, to make that work?
You don't want to use P3T and Eagle at the same time and so for EAGLE you need an upconverter from 2 meters to 2.4 GHz + a power amplifier antenna mounted depending on your transmission line losses (I have a 144-146 MHz to 2400-2402 MHz transverter + 10 watt linear amplifier mounted at the dish for AO40) and so if EAGLE will likely use an uplink between 2400 to 2402 MHz I will be very luky.
If I am using the S band for the uplink which band am I using for the downlink? 2m or 70cm?
The downlink of EAGLE will be made some where between 5830 to 5850 MHz and as far I know the exact frequency segment has been not yet decided but you need a downconverter specifically designed to receive the above band when it will be chosen. Now if your 2.4 GHz upconverter uses a 2 meter IF then you must use a 70 cm IF for your 5.8 GHz downconverter. A 70 cm IF allow you to get a better receiver image rejection on downlink while not to be IF to IF interfered using a 2 meters IF for the uplink.
Les W4SCO
73" de
i8CVS Domenico
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