Today's Message Index:
----------------------
0. 12:26 AM - Just A Few More Days To Make Your List Contribution... (Matt Dralle)
1. 08:15 AM - Schematic Drawings (Paul Zimmer)
2. 02:37 PM - Wire bundle Q (chris Sinfield)
3. 03:35 PM - Re: PTT Y adapter for RST intercom (user9253)
4. 07:50 PM - Re: PTT Y adapter for RST intercom (messydeer)
5. 07:55 PM - Re: Wire bundle Q (Robert L. Nuckolls, III)
6. 07:59 PM - Re: Schematic Drawings (Robert L. Nuckolls, III)
7. 08:35 PM - KX170/175 Installation Manual (Robert L. Nuckolls, III)
8. 08:57 PM - Re: KX170/175 Installation Manual (rayj)
9. 08:58 PM - Re: PTT Y adapter for RST intercom (user9253)
10. 09:08 PM - Re: KX170/175 Installation Manual (Kelly McMullen)
11. 09:19 PM - Re: KX170/175 Installation Manual (Robert L. Nuckolls, III)
12. 09:28 PM - Re: KX170/175 Installation Manual (rayj)
13. 09:31 PM - Re: PTT Y adapter for RST intercom (messydeer)
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Subject: | Just A Few More Days To Make Your List Contribution... |
There is less than a week left in this year's List Fund Raiser and only a few short
days to grab one of the great Contribution Gifts available this year. Support
is still significantly lagging behind last year at this point but hopefully
it will pick up here towards the end. Please remember that it is solely the
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The List Contribution web site is secure, fast, and easy and you can use a credit
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I want to thank everyone that has already made a generous contribution to support
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Thank you!
Matt Dralle
Matronics EMail List and Forum Administrator
Message 1
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Subject: | Schematic Drawings |
Bob, drawing Z-12 shows the conductor from the battery contactor to the
battery bus as being a 12 AWG conductor of 6 inches length or less (rev.
K =93 04/20/05). I understand the reason for the short conductor
is for crash safety for the always on buss. However, I=99m using
panel mounted circuit breakers for my three power busses (main,
essential, battery) and so adhering to the 6 inch specification
isn=99t possible. What are your thoughts of the addition of a
properly rated circuit breaker or fusible link on the engine side of the
firewall to protect the remaining conductor the length of which I
estimate will be 36 to 48 inches depending on location of the electrical
conductor firewall penetration? By the way, my Ebus will have one PMAG
(one PMAG, and one conventional mag installation), clock, cabin lights,
fuel boost, and switched Ebus alternate feed on the battery buss.
Thanks
Message 2
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Hi all
I am running my wires and coax for my radio and intercom. I also have a Dynon Ext
compass wires to run as well.
If i run the compass and VHF coax together in the one bundle, will I get a heading
change every time I TX? what about if I run the Intercom wires with the Compass
wires will the same thing happen when I TX?
I just have limited holes available to put wire bundles.
Chris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=359253#359253
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Subject: | Re: PTT Y adapter for RST intercom |
Dan,
Your schematic, "RST intercom DPDT PTT with shields.JPG" looks OK to me. The goal
is to connect only one mic audio at a time to the handheld radio. Your schematic
accomplishes that.
However, I suggest that you use relays as shown on RST dwg 422-3060. Then the
mic audio wires can be kept short instead of running them to the control sticks.
Short wires are less likely to pick up interference. By using relays, there
will be only half as many wires going to the control stick. Double pole
relays will allow the hand-held x-mit key to be connected directly to ground instead
of through a series diode. Who knows if the handheld transmitter will
be keyed with voltage dropped across a diode? The relays will not carry much
current. So miniature ones with gold plated contacts are best.
RST drawing 442-4072 was confusing to me at first until I realized that the headsets
plug into the intercom and the other plugs and jacks interface the intercom
with the radio.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=359259#359259
Message 4
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Subject: | Re: PTT Y adapter for RST intercom |
Thanks, Joe :-)
What you say makes sense about using a relay. I drew a couple diagrams, one with
a single relay and another with a double relay, but I must be missing something,
cuz it looks like both of them have the transmit key connected directly to
ground.
I also included another RST drawing. I put a diode in the same place in my drawings,
but don't know why it's needed. I'm familiar with using a reversing diode
normally put between the two coil leads, which hasn't been included. Why one
and not the other?
Another nice thing about using relays in my particular case is that I've already
got the spst stick switches made and fitted, just waiting for wires. If I figure
this relay thing out, looks like I'll still be able to use them :-)
--------
Dan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=359272#359272
Attachments:
http://forums.matronics.com//files/ptt_single_pole_relay_168.jpg
http://forums.matronics.com//files/ptt_double_pole_relay_931.jpg
http://forums.matronics.com//files/apnote_03_rst_ptt_relay_136.jpg
Message 5
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Subject: | Re: Wire bundle Q |
At 04:32 PM 11/25/2011, you wrote:
><chris_sinfield@yahoo.com.au>
>
>Hi all
>I am running my wires and coax for my radio and intercom. I also
>have a Dynon Ext compass wires to run as well.
>
>If i run the compass and VHF coax together in the one bundle, will I
>get a heading change every time I TX? what about if I run the
>Intercom wires with the Compass wires will the same thing happen when I TX?
>I just have limited holes available to put wire bundles.
Run them all together. Folks who build devices
for airplanes are or at least should be aware
of potential hazards to proper functioning of
their system.
DO-160 and other certification protocols were
crafted for the purpose of raising awareness of
potential risks and proving that the system
designer adequately compensates for those
risks.
In short, if any manufacturer specifically
states that you should maintain "certain
separation" from the wires of other systems,
there is good reason to question their due
diligence in designing the product. It is not
difficult to craft products 99.99% immune from
all expected risks.
Bob . . .
Message 6
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Subject: | Re: Schematic Drawings |
At 10:11 AM 11/25/2011, you wrote:
>Bob, drawing Z-12 shows the conductor from the
>battery contactor to the battery bus as being a
>12 AWG conductor of 6 inches length or less
>(rev. K 04/20/05). I understand the reason
>for the short conductor is for crash safety for
>the always on buss. However, Im using panel
>mounted circuit breakers for my three power
>busses (main, essential, battery) and so
>adhering to the 6 inch specification isnt
>possible. What are your thoughts of the
>addition of a properly rated circuit breaker or
>fusible link on the engine side of the firewall
>to protect the remaining conductor the length of
>which I estimate will be 36 to 48 inches
>depending on location of the electrical
>conductor firewall penetration? By the way, my
>Ebus will have one PMAG (one PMAG, and one
>conventional mag installation), clock, cabin
>lights, fuel boost, and switched Ebus alternate feed on the battery buss.
If your "battery" bus is on the panel, then it's not a battery
bus but yet another bus tasked with different loads. Its
long feeder would be fitted with another battery contactor.
A battery bus is always hot, drives wires that are always
hot but protected with fast devices rated below the legacy
crash safety design rules . . . and located AT the battery.
Once you depart from this convention, it's some other kind of bus
that gets treated like other fat-wire fed busses in the
airplane.
Bob . . .
Message 7
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Subject: | KX170/175 Installation Manual |
A coule years ago, somebody here on the List offered
me a .pdf copy of the King KX170 installation manual.
In the Matronics archives, there's a note where I posted
availability of that document in the installation data
feature of my website.
Now, for some reason unbeknownst to me, I don't it it
either on my website or on my hard-drive.
If somebody has access to this document (or any
other vintage installation manuals) in .pdf, I'd
be pleased to have copies for sharing.
Bob . . .
Message 8
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Subject: | Re: KX170/175 Installation Manual |
Bob,
I have a kx 145 manual, but it's in paper and would take a while to
scan. If you're interested, let me know and I'll try to get it scanned
over the winter.
Raymond Julian
Kettle River, MN
"And you know that I could have me a million more friends,
and all I'd have to lose is my point of view." - John Prine
On 11/25/2011 10:31 PM, Robert L. Nuckolls, III wrote:
> <nuckolls.bob@aeroelectric.com>
>
> A coule years ago, somebody here on the List offered
> me a .pdf copy of the King KX170 installation manual.
>
> In the Matronics archives, there's a note where I posted
> availability of that document in the installation data
> feature of my website.
>
> Now, for some reason unbeknownst to me, I don't it it
> either on my website or on my hard-drive.
>
> If somebody has access to this document (or any
> other vintage installation manuals) in .pdf, I'd
> be pleased to have copies for sharing.
>
>
> Bob . . .
>
>
Message 9
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Subject: | Re: PTT Y adapter for RST intercom |
Dan,
How about a circuit like this dwg attached?
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=359284#359284
Attachments:
http://forums.matronics.com//files/ptt_relays_239.pdf
Message 10
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Subject: | Re: KX170/175 Installation Manual |
I have the pinout diagram, but not the install manual.
On 11/25/2011 9:52 PM, rayj wrote:
>
> Bob,
>
> I have a kx 145 manual, but it's in paper and would take a while to
> scan. If you're interested, let me know and I'll try to get it
> scanned over the winter.
>
> Raymond Julian
>
>> <nuckolls.bob@aeroelectric.com>
>>
>> A coule years ago, somebody here on the List offered
>> me a .pdf copy of the King KX170 installation manual.
>>
>> In the Matronics archives, there's a note where I posted
>> availability of that document in the installation data
>> feature of my website.
>>
>> Now, for some reason unbeknownst to me, I don't it it
>> either on my website or on my hard-drive.
>>
>> If somebody has access to this document (or any
>> other vintage installation manuals) in .pdf, I'd
>> be pleased to have copies for sharing.
>>
>>
>> Bob . . .
>>
>>
>>
>>
>
>
Message 11
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Subject: | Re: KX170/175 Installation Manual |
At 10:52 PM 11/25/2011, you wrote:
>
>Bob,
>
>I have a kx 145 manual, but it's in paper and would take a while to
>scan. If you're interested, let me know and I'll try to get it
>scanned over the winter.
Yeah, that's a big job. I used to have access to
an automatic scanner that would take a stack of paper
and make a big .pdf of two sided paper copies.
Sure was handy.
If you'd like to see the work added to the body
of data offered, it would be appreciated but
don't let it get in the way of anything important.
Bob . . .
Message 12
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Subject: | Re: KX170/175 Installation Manual |
do not archive
I'll try to get it done, a little at a time.
Raymond Julian
Kettle River, MN
"And you know that I could have me a million more friends,
and all I'd have to lose is my point of view." - John Prine
On 11/25/2011 11:16 PM, Robert L. Nuckolls, III wrote:
> <nuckolls.bob@aeroelectric.com>
>
> At 10:52 PM 11/25/2011, you wrote:
>>
>> Bob,
>>
>> I have a kx 145 manual, but it's in paper and would take a while to
>> scan. If you're interested, let me know and I'll try to get it scanned
>> over the winter.
>
> Yeah, that's a big job. I used to have access to
> an automatic scanner that would take a stack of paper
> and make a big .pdf of two sided paper copies.
> Sure was handy.
>
> If you'd like to see the work added to the body
> of data offered, it would be appreciated but
> don't let it get in the way of anything important.
>
>
> Bob . . .
>
>
Message 13
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Subject: | Re: PTT Y adapter for RST intercom |
Nice :-)
Hadn't thought about this before, but I think the PTT relay grounds would go to
a/c ground, and the other 4 would go to the radio jack sleeve, right?
I also looked around Digikey.com for the relays. It was hard to match the relays
with sockets that are sold separately. I'm browsing through Ebay, which may
have something.
--------
Dan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=359290#359290
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