Was wondering what the proper configuration is for keying an Alpha 78A using a
Paragon 585. The 585 provides a open collector TX output pin which is
keying the Titan Linear, but requires a loop back to its companion TX enable
input for proper
operation. There is also a N.O. mechanical relay output with variable dropout
delay which is tied
directly to the CW key line. Would either of these two outputs be suitable for
keying the Alpha 78?
According to the Paragon manual, in CW mode the Paragon provides for a 1 - 5 ms
delay from key
closure to RF envelope rise via a waveshaping circuit. The key closure signal
is also routed thru the
Paragon's microporcessor before its reaches the delay circuit which provides an
unspecified processing delay. Would the closure time of the Paragon's
mechanical relay plus the delay
time of the Alpha 78A be small enough to allow for proper sequencing? Or is the
closure time of mechanical
relay in the Paragon too slow to ensure that I am not hot switching the Alpha
with this configuration?
What if I want to run QSK? Does the Alpha provide a keying "loop" that is
compatible with the
Paragon's TX output/TX enable pins?
73 de Mike, W4EF..............
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