[Rover] amp sequencing/controlling

[Lu]

We just got our DEMI 222 transverter in the mail.  Can someone confirm that
the RCA jack for DC power is (+) to center conductor and (-) to outer
conductor like most electronic devices?

We will be using an HTX-100 for an IF radio.  We have a "PTT low" output
built into the IF radio, but of course it's only a single output (RCA
jack)...so it's fine for controlling the transverter--but the brick still
requires a control signal.  Since we don't yet have a sequencer, we have no
way to automate the brick sequencing process with a ground-on-transmit
control signal.  I've heard that a toggle switch can be used to manually
activate the brick before starting to transmit.  Has anyone done this?  If
so, where did you get the low logic state without the IF radio being in TX
mode?  Thanks.

AA2YG/R