Re: [amsat-bb] TS-2000 & external preamps. Caution!

["David Greenberg" <daivi248@xxxxxxxxxxxx>]

Thanks for the info!

David, 4X6IA

----- Original Message ----- 
From: "David Reinhart" <wa6ilt@bellatlantic.net>
To: <amsat-bb@AMSAT.Org>
Sent: Saturday, January 31, 2004 4:37 AM
Subject: [amsat-bb] TS-2000 & external preamps. Caution!


> When I bought an Icom 271H it came with an Icom AG-25 mast-mount
> preamp.  Not the best, but it did the trick.  The 271H powered the
> preamp through the coax and dropped the voltage on transmit.  The preamp
> is *not* RF sensing.
> 
> I replaced the Icom with a TS-2000 and got an SSB Electronics DCW-15B
> sequencer/bias tee to control and power it.  What is *not* clear from
> the TS-2000 manual (Page 96) is that you need to set a "linear amplifier
> delay" for each band via the proper sub-menu item under menu number 28.
> The default is "off" and I  thought I had to worry about a delay *only*
> if I was running a linear.  Wrong!  Without a delay set the rig won't
> sink the controller on transmit.  Bye-bye preamp.
> 
> I also have an SSB preamp on 70cm but that one does RF sensing so it
> didn't burn up, thank goodness.
> 
> Dave Reinhart
> wa6ilt@amsat.org
> 
> 
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