Hi Bob
Motorgliders and tow planes need to have the PowerFlarm audio signal
spliced into into the cable to the headset otherwise the audio warning
signals from the PowerFlarm unit are too low to be heard. I have been
through this exercise with the portable unit. You cannot just parallel
drive the headset with the PowerFlarm and radio. If you do that you
will have a conflict with the output of the radio diminishing both the
volume and the distortion (Becker Radio). What you need to do is to
put a 51 ohm resistor in series with the output of the PowerFlarm to
the headset. This negates the conflict and allows compatibility
between the audio levels of the radio and Power Flarm. Why?
My PowerFlarm resets itself every time I press the starter motor
button. In resetting the alarm audio level defaults to maximum volume
which is much louder than the radio using the headset. The 51 ohm
resistor sets the volume perfectly for me.
PowerFlarm is still a work in progress. One would have hoped that
they by now would have fixed the teething problems. But no. Maybe
sometime in the future? Good luck.
Dave



On Jun 7, 6:07*pm, Bob Gibbons wrote:
Question: How have Flarm users around the world handled the lack of
audio intercom output in the standard Flarm unit when installed in
towplanes?

Is the simple visual LED output on the Flarm display adequate, or have
you had to add auxiliary audio intercom capability to the Flarm for
your towplanes?

As we in the U.S. prepare to deploy PowerFlarm into our fleet, we will
have to deal with this installation issue into our towplanes.

In an unfortunate decision (my opinion), Flarm has opted to delete
from the "brick" model the intercom audio output that is part of the
"portable".

We are faced with the decision to either use the brick in our
towplanes with no audio alert, or integrate the portable model, having
to add external displays and antenna to this otherwise self-contained
unit.

What have others found regarding the need for an auxiliary headset
audio output when towing with the Flarm?

Thanks

Bob