Re: [amsat-bb] Protecting downconverters

["John / NS1Z" <ns1z@xxxxxxxx>]

On a similar note: are any of you protecting the input side of the Drake
2880 (and its cousins) from RF overload? Maybe back to back diodes or
something? Is this necessary?

----- Original Message -----
From: David Reinhart <wa6ilt@bellatlantic.net>
To: <amsat-bb@AMSAT.Org>
Sent: Thursday, March 29, 2001 5:41 PM
Subject: [amsat-bb] Protecting downconverters


> My previous experience with receive converters is that sooner or later I'm
going to fry them with RF, no matter how careful I am about disconnecting
from the transceiver after use, etc.  If nothing else, sooner or later the
AC glitches and the converter gets hit with a transient when the power comes
back.
>
> Has anybody seen a circuit, perhaps essetially a PIN diode TR switch) that
can be placed between the xcvr and the converter that could shunt stray RF
fast enough to save the converter?  Maybe even have actual "RF Out" that
could go to a dummy load to soak up the power from inadvertently keying the
rig?
>
> Dave Reinhart
>
>
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