KX155 KX 155A Anybody know the difference?

"Allen" wrote in message
om...

"Mike Rapoport" wrote in message
ink.net...

"Aaron Coolidge" wrote in message
...
Mike Rapoport wrote:
: The KX155 in my "new" airplane (Helio Courier) seems to have bitten
the
: dust. It looks like an old POS and I am trying to figure out what
to
do.
: What are the functional differences between the KX155, KX165 and the
KX155A
: and KX165A? The airplane has a Garmin 300XL as #1 and a switching
relay
to
: allow the 300XL or the KX155 to drive the HSI. I am trying to
decide
what
: to do.

An additional point: ALL the 'A' suffix units are 28V only. The others
may
be
either 14V or 28V, depending on the model number.

These radios are available for not too much $$$ used.

As an aside, I think your radio trouble is in the aircraft wiring or
the
radio's internal fuse.
--
Aaron Coolidge (N9376J)

Thanks! Do you know the value of the fuse?

Mike
MU-2



I agree with Aaron, sounds like wiring problems. When you key the mike to
transmit it takes a lot more power. May be a bad ground? Is the Helio
28V
and the radios 14V (converter going bad)?

Allen


It worked normally until one day when it totally failed, no display, no
radio, nothing. It could be outside the radio but I can't think of anything
that coincides with the failure. It is a 14V airplane with a 28V 155. I am
planning of getting a 14V radio and getting rid of the voltage converter. I
will probably get a 165 so that I can get rid of the VOR converter too.

Mike
MU-2

On Wed, 01 Sep 2004 18:15:56 GMT, "Mike Rapoport"
wrote:
It worked normally until one day when it totally failed, no display, no
radio, nothing. It could be outside the radio but I can't think of anything
that coincides with the failure. It is a 14V airplane with a 28V 155. I am
planning of getting a 14V radio and getting rid of the voltage converter. I
will probably get a 165 so that I can get rid of the VOR converter too.


What OBS are you driving? If it's a 208/209 they have the VOR/LOC
converter integrated, so you don't need the 165.

In article ,
Mike Rapoport wrote:
It worked normally until one day when it totally failed, no display, no
radio, nothing. It could be outside the radio but I can't think of anything
that coincides with the failure. It is a 14V airplane with a 28V 155.

Did you test the voltage converter?

--
Ben Jackson

http://www.ben.com/

Mike Rapoport wrote:

: As an aside, I think your radio trouble is in the aircraft wiring or the
: radio's internal fuse.
: --
: Aaron Coolidge (N9376J)
:
: Thanks! Do you know the value of the fuse?

There are 2 fuses, one for the display high voltage and one for the rest.
Their values are printed on them. You need to take the radio out & take the
cover off to get at them. I think they're under the top cover. Remember which
holes the screws come out of, they're several different lengths.
--
Aaron Coolidge (N9376J)

I found this on Eastern Avionics website: page
http://www.avionix.com/navcoms.html
You have to read about the 155 and 165 to determine what the 155A has!
The KX-155A has a VOR/Localizer converter board and digital radial feature
on the Nav side. It also has 32 programmable COM channels, remote channel
increment capability, stuck mike alert and shutdown, bearing TO and radial
FROM modes, internal VOR/LOC CDI Display elapsed timer, and full
backlighting of knobs and buttons..


Hope this helps.
Tom
"Aaron Coolidge" wrote in message
...
Mike Rapoport wrote:
: The KX155 in my "new" airplane (Helio Courier) seems to have bitten the
: dust. It looks like an old POS and I am trying to figure out what to
do.
: What are the functional differences between the KX155, KX165 and the
KX155A
: and KX165A? The airplane has a Garmin 300XL as #1 and a switching relay
to
: allow the 300XL or the KX155 to drive the HSI. I am trying to decide
what
: to do.

An additional point: ALL the 'A' suffix units are 28V only. The others may
be
either 14V or 28V, depending on the model number.

These radios are available for not too much $$$ used.

As an aside, I think your radio trouble is in the aircraft wiring or the
radio's internal fuse.
--
Aaron Coolidge (N9376J)