[amsat-bb] RF Sensing Preamps, Sequencer, or both?
glasbrenner at mindspring.com
Tue Aug 2 11:01:54 UTC 2016
Sequencers are generally only needed for high power operations over a few hundred watts, which are inappropriate on satellite. I think you'll find most of us use RF switched preamps at the antenna, with a few using them in the shack but with very good feedline.
73, Drew KO4MA
From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Fred Castello
Sent: Monday, August 01, 2016 8:05 PM
To: amsat-bb at amsat.org
Subject: [amsat-bb] RF Sensing Preamps, Sequencer, or both?
I am in the process of trying to set up a station here and have been researching equipment. While I suspect there will be a fair amount of variety, I am curious to the responses to my question:
Do you use the relatively less expensive “indoor” NON RF switching preamps in an enclosure near the antennas (on the tower) with RF relays and with a sequencer in the shack (do the preamps holdup up on the tower even if protected?) OR
Do you use RF sensing preamps mounted at the tower OR
Both (for those that are extra careful)? I suspect operators that do other VHF/UHF low signal work tend toward sequencers (one for 2 meters and one for 440), i.e. moon bounce, meteor scatter, etc.
Also, I am curious what type/brand/model of RF relays folks use?
As usual, I really appreciate your time.
Fred Castello, KF4FC
Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
More information about the AMSAT-BB