GPS questions

"10Squared" wrote

One thing I have noted about my EKP-IV is that it produces radio noise on
the aviation frequencies.

Hard to believe that an aviation GPS would cause problems with your aviation
radios.

Does it make noise on the batteries and the power converter?

Power converters are often the source of much RF noise.

I also would be interested in hearing from other EKP-IV owners, to see if
they experience these problems, also. If not, it could be a problem with
you radio installation.
--
Jim in NC

"10Squared" wrote
One thing I have noted about my EKP-IV is that it produces radio noise on
the aviation frequencies.

Morgans wrote:
Hard to believe that an aviation GPS would cause problems with your aviation
radios.
Does it make noise on the batteries and the power converter?
Power converters are often the source of much RF noise.
I also would be interested in hearing from other EKP-IV owners, to see if
they experience these problems, also. If not, it could be a problem with
you radio installation.

It is a tablet computer with a gps receiver.
The power supply, processor clock and display driver are all sources of
RF noise.

Morgans wrote:


"10Squared" wrote

One thing I have noted about my EKP-IV is that it produces radio noise on
the aviation frequencies.

Hard to believe that an aviation GPS would cause problems with your
aviation radios.

Yeah, that was my reaction. I noticed on my Icom IC-A23 handheld that I was
getting static on 122.8. I turned the squelch up all the way and that
didn't help. Turned off the AvMap and that cured the problem. Proximity to
the unit was a factor, but I haven't done any additional tests to quantify
the amount of interference or the specific sources of interference (power
cable, antenna, or cpu).

Does it make noise on the batteries and the power converter?

Power converters are often the source of much RF noise.

Not sure what you mean by power converter. There is a power cord for DC
power from the aircraft to the GPS. However, since the batteries are for
emergency use the only practical configuration is with the unit powered by
the aircraft power supply.


I also would be interested in hearing from other EKP-IV owners, to see if
they experience these problems, also. If not, it could be a problem with
you radio installation.

Me too. And note too, AvMap Navigation has turned off their web forum on
their website.

Repeat after me. A handheld is NOT an aircraft radio. Devices tested to
work with "normal" aircraft radios may or may not work with handhelds. The
designer did not intend the antenna of the radio to be less than a meter
from the device he tested.

A handheld is NOT an aircraft radio. Most of them do NOT have the noise
suppression capability OR the filtering of an aircraft radio.

Jim



"10Squared" wrote in message
.. .
Morgans wrote:



Yeah, that was my reaction. I noticed on my Icom IC-A23 handheld that I
was
getting static on 122.8.

Morgans wrote:
"10Squared" wrote

...

Power converters are often the source of much RF noise.
Yes. One of our cell phone rechargers wipes out the AM radio in the
car. The noise is especially noticeable when tuned to a weak station
near the bottom of the dial.