Today's Message Index:
----------------------
1. 08:02 AM - Detroit Approach freq (Fergus Kyle)
2. 11:57 AM - KX-155 Power connections help! (Matthew Brandes)
3. 05:02 PM - Re: KX-155 Power connections help! (Mike Larkin)
4. 05:49 PM - Fire Indication Probe (Charlie Burton)
5. 08:25 PM - Re: KX-155 Power connections help! (Matthew Brandes)
6. 11:24 PM - Split washers vs. Nyloc nuts (Mickey Coggins)
Message 1
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| Subject: | Detroit Approach freq |
--> AeroElectric-List message posted by: "Fergus Kyle" <VE3LVO@rac.ca>
"
Time: 04:47:20 PM PST US
From: Cameron Kurth <cameronkurth@yahoo.com>
Subject: Re: AeroElectric-List: Garmin 196 interferes with com radio
--> AeroElectric-List message posted by: Cameron Kurth
<cameronkurth@yahoo.com>
>I would be interested in the specific VHF frequencies
so I can test my setup.
The only frequency that has any interference is
118.95. That just happens to be Detroit Approach. I
live under Detroit's class B airspace so it's an
important frequency for me. Also I'm working on my
instrument ticket so I talk to approach quite abit and
a channel full of static just doesn't help in my
learnings :) Cam"
Fred et al,
This sounds to me to call for a 'stub' to short out the
interference in that freq. [standard tuning stub]. Installing it in a series
of lines might eliminate all but the offending unit?
Comments? Ferris Buehler? Anyone?
Ferg
Message 2
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| Subject: | KX-155 Power connections help! |
--> AeroElectric-List message posted by: Matthew Brandes <matthew@n523rv.com>
HELP! I'm trying to wire up my KX-155/GS this afternoon and can't figure out
something.
The wiring diagram shows POWER IN on pins 14 and R.
The wiring diagram shows GROUND on pins 15 and S.
I power on the unit and nothing... so I'm looking at the wiring diagram for
something I missed.
There are two pins labled SWITCHED POWER IN (11 and M) and two pins labeled
SWITCHED POWER OUT (12 and N). The wiring diagram shows them all connected
together. My thought was that these were to power up an external CDI or
something. So I hooked two power wires up to the SW POWER IN pins and then
turned on the master. Immediately the radio came on! The radio now works but
the ON/OFF switch on the front of the unit doesn't control the power any more.
(I don't have anything connected to the SW POWER OUT right now.)
Has anyone wired a KX155 and can tell me what these Switched Power pins are for
and how they get wired? I don't want to go much further for fear of smoking
something.
Matthew
913.706.3087 (cell)
matthew at n523rv.com
Message 3
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| Subject: | KX-155 Power connections help! |
--> AeroElectric-List message posted by: "Mike Larkin" <mlas@cox.net>
I have wired many KX155's. You should be able to power the unit with
14vdc at pins 14 and R. 28vdc at pins 13 and P, and with grounds at
pins S and 15. If this doesn't work I would say you have something
wrong with the radio (maybe a pico fuse on the power supply, not sure I
don't have the schematics here in front of me.... Switched in is for
bypassing the on off switch and is not normally used. Switched is for
low current units that you want to control with the KX-155 such as a VOR
head that requires a switched power input.
Mike Larkin
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
Matthew Brandes
Subject: AeroElectric-List: KX-155 Power connections help!
--> AeroElectric-List message posted by: Matthew Brandes
<matthew@n523rv.com>
HELP! I'm trying to wire up my KX-155/GS this afternoon and can't figure
out
something.
The wiring diagram shows POWER IN on pins 14 and R.
The wiring diagram shows GROUND on pins 15 and S.
I power on the unit and nothing... so I'm looking at the wiring diagram
for
something I missed.
There are two pins labled SWITCHED POWER IN (11 and M) and two pins
labeled
SWITCHED POWER OUT (12 and N). The wiring diagram shows them all
connected
together. My thought was that these were to power up an external CDI or
something. So I hooked two power wires up to the SW POWER IN pins and
then
turned on the master. Immediately the radio came on! The radio now
works but
the ON/OFF switch on the front of the unit doesn't control the power any
more.
(I don't have anything connected to the SW POWER OUT right now.)
Has anyone wired a KX155 and can tell me what these Switched Power pins
are for
and how they get wired? I don't want to go much further for fear of
smoking
something.
Matthew
913.706.3087 (cell)
matthew at n523rv.com
--
--
Message 4
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| Subject: | Fire Indication Probe |
--> AeroElectric-List message posted by: "Charlie Burton" <notrubce@hotmail.com>
I'm looking for a probe to put inside the cowl that will detect a fire and set
off an alarm. I'm installing a remote fire extinguisher system and would like
something to indicate a fire before the red hot firewall or leaking smoke does.
Charlie Burton
Message 5
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| Subject: | RE: KX-155 Power connections help! |
--> AeroElectric-List message posted by: Matthew Brandes <matthew@n523rv.com>
Mike (and list),
Thanks for the email. I decided after sending my email to just do what the
wiring diagram says and tie all four of those SWITCHED connections together...
and it worked!
The only thing I can think of is that the switched OUT pins are controlled by
the on/off switch at the faceplate and are fed from the 14v power in pins (14
and R). The switched IN pins must feed power to the display. (Which is why my
display worked when I put power on them directly from the bus.) It also shows
that you can wire a connection OUT to the CDI, so I have that wired to pin 41
on my 209A indicator but haven't hooked it up yet to test.
Sure seems like an odd way to power the display! This was my last piece of
avionics to wire, so after I test the transmit on the radio tomorrow, I'll be
done with avionics wiring.... on to engine monitor wiring.
Matthew
RV-9A Avionics!
www.n523rv.com
Message 6
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| Subject: | Split washers vs. Nyloc nuts |
--> AeroElectric-List message posted by: Mickey Coggins <mick-matronics@rv8.ch>
Hi,
My fuel pumps came with what look like brass nuts
and a split lock washer. These are used to hold
on the ring terminals.
I've read that these split lock washers are not
recommended in an aviation application. I would
like to replace these with a standard flat washer
and a nyloc nut. Does this seem like a good idea?
Photo here:
http://www.rv8.ch/images/articles/20050814081622711_1_original.JPG
Thanks for any feedback.
Mickey
--
Mickey Coggins
http://www.rv8.ch/
#82007 finishing
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