[amsat-bb] Re: Sequencer

Edward Cole kl7uw at acsalaska.net
Mon Mar 12 06:29:06 PST 2007

At 05:15 AM 3/12/2007, Stargate wrote:
>Is a sequencer needed when using a 160w switchable preamp from ARR?
>(Advanced Receiver Research)

Let's analyze this:

You send a voltage to run the preamp.  It needs voltage to switch to 
Tx mode.  When RF from your transmitter arrives it switches over to 
bypass the preamp.  I would guess if you turn off the power to the 
unit, it can't operate correctly, so how is a sequencer going to 
help?  I have not owned one of these units so not familiar with their 
power wiring.  If you have two 12 volt power contacts then you might 
run the preamp separately from a sequencer.

Ed - KL7UW
  BP40IQ   50-MHz - 10-GHz   www.kl7uw.com
144-EME: FT-847, mgf-1801, 4x-xpol-20, 185w
DUBUS Magazine USA Rep dubususa at hotmail.com

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