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1. 09:35 AM - Re: SL-15 Unswitched Audio Connection (Robert L. Nuckolls, III)
2. 09:45 AM - Re: SL-15 Unswitched Audio Connection (Robert L. Nuckolls, III)
Message 1
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| Subject: | Re: SL-15 Unswitched Audio Connection |
At 10:59 AM 7/9/2015, you wrote:
>I have a SL-15 Audio Selector Panel that has two "unswitched" audio
>connections. One is hooked up to my AOA warning. I would like to
>use the other for the audio of the Advanced Flight System 5600 EFIS
>I am installing. The SL-15 uses Molex 08-05-0301 connectors which
>are discontinued and I cannot find them anywhere.
>
>My three options seem to be:
>
>Find someone who has a connector I can purchase (failed so far but
>maybe one of you has an extra)
How many pins are in these connectors?
That style of connector was received with considerable
excitement at Cessna . . . waaayyyy back when. For
a few years, we made up our own audio switching and
signal routing junction box utilizing the .156 spaced,
card edge connectors. They were the "Amp Leaf" from
Amp-Inc.
http://tinyurl.com/qbqndka
http://tinyurl.com/p2dfvfs
Later, others jumped in with their own offerings
. . . one of which was the KK series from Molex
http://tinyurl.com/7t6jjsc
Cessna got out of that activity after a few
years in favor of exploiting off-the-shelf
devices . . . that first experiment into
rudimentary avionics manufacturing had some
reliability issues. I wasn't directly involved
in the engineering gyrations . . . but I got
to observe it and write about it. There proved
to be other form-factors for bringing wires
off pc boards that were a quantum jump in
reliability for black-boxes on airplanes.
Nonetheless, King radio, Narco and others
produced a goodly number of devices with this
technology. The .156" card-edge has been
'not recommended for new design' for a very
long time.
This poses problems for exploiting the utility
of these venerable devices. Quite often, extending
the air-worthiness of these devices goes beyond
finding pins for adding features. What's a OBAM'er
to do when the existing connector has degraded to
one step above trash . . . or worse.
I've stroked new service life into several devices
by replacing the crimped pin connector with solder
flag connectors. Like this . . .
http://tinyurl.com/nbuab2a
Unfortunately, not ALL sizes are available but
with some creative application of time/effort and
JB weld, you can fabricate a connector of any desired
size that offers you all new pins. Check out all
the images in the third link above.
Bob . . .
Message 2
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| Subject: | Re: SL-15 Unswitched Audio Connection |
>If you have that spare that can be moved, there's usually a little
>tab on the back side that prevents it from backing out. If you have
>something thin and narrow enough, you should be able to slide it in
>from the 'front' (non-wire) end and push the tab away from it's
>mating lock point in the shell.
Here's a DIY extraction tool
for the leaf-style card edge
connector pins.
http://tinyurl.com/nknv4bk
Made this from a pocket screwdriver
sacrificed to the task while on a
field-trip . . . A little creating
grinding will get you the right dimensions
for your target connector.
Bob . . .
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