Today's Message Index:
----------------------
1. 12:27 AM - Re: Re: led trim display (bob noffs)
2. 05:20 AM - Re: Re: led trim display (rparigor@suffolk.lib.ny.us)
3. 01:08 PM - Re: Re: led trim display (bob noffs)
4. 01:30 PM - How to lose both ignition systems? (Builder_Bill)
5. 07:09 PM - Re: How to lose both ignition systems? (Robert L. Nuckolls, III)
Message 1
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| Subject: | Re: led trim display |
thanks for the replys. all in all i guess it is good news compared to
improper wiring.
bob noffs
On Wed, Aug 28, 2013 at 10:29 AM, Eric M. Jones <emjones@charter.net> wrote:
> emjones@charter.net>
>
> I like Ray Allen stuff, but the RP3 indicator and the trim boxes have
> limitations. One of them is that the full-scale voltage returned from the
> trim box pot is 1.2V. This is an issue when the wiring is close to the
> transmitter because the voltages are way down in the RFI/EMI mud. The other
> is the nature of the LED bar graph, which is an old design that can only
> get so bright, and updates to the design, like an LCD aren't happening.
>
> See attached schematic.
>
> My approach was to eliminate the indicator and turn the "trim box" into a
> true servo. I designed the TSCMR, true servo control to do that.
> Alternatively, I designed a more advanced version, BUT DON'T SELL IT, that
> uses 12V full-scale voltage at the trim box potentiometer, the bar graph,
> an "In Transit" led, a "locked" led and a setting knob.
>
> --------
> Eric M. Jones
> www.PerihelionDesign.com
> 113 Brentwood Drive
> Southbridge, MA 01550
> (508) 764-2072
> emjones(at)charter.net
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=407633#407633
>
>
> Attachments:
>
> http://forums.matronics.com//files/tscmr_installation_manual_416.pdf
>
> http://forums.matronics.com//files/rac_trim_and_trim_indicator_schematics_433.pdf
>
>
Message 2
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| Subject: | Re: led trim display |
Hi Bob
The Europa that I am building uses a Ray Allen for pitch trimming. I have
read over the years that some folks have the same problem you are
experiencing when transmitting. It seems that the greatest success is
keeping the wire run as far from antenna and associated wires as you can.
I installed 5 conductor twisted with shielding from ACS:
http://www.europaowners.org/main.php?g2_itemId=30484
Ron Parigoris
Message 3
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| Subject: | Re: led trim display |
it is a very minor thing. if fact i saw it 6 months ago and it wasn't until
last week i keyed the mike and say the led display dance that i remembered
it happened before. guess i don't look at my trim while talking! there! i
am used to it already. now, it it changed the trim that would be something
else.
bob noffs
On Thu, Aug 29, 2013 at 7:18 AM, <rparigor@suffolk.lib.ny.us> wrote:
> Hi Bob
>
> The Europa that I am building uses a Ray Allen for pitch trimming. I have
> read over the years that some folks have the same problem you are
> experiencing when transmitting. It seems that the greatest success is
> keeping the wire run as far from antenna and associated wires as you can. I
> installed 5 conductor twisted with shielding from ACS:
>
> http://www.europaowners.org/main.php?g2_itemId=30484
>
> Ron Parigoris
>
> *
>
> *
>
>
Message 4
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| Subject: | How to lose both ignition systems? |
Bob, I was at your seminar at EAA431Brodhead, WI this Spring.
There was a discussion on an accident involving a Lancair Dual LSE Ignition failure.
I could not find it in a simple NSTB search assuming I even have enough
details right to do so.
The builder had supplied each LSE from an independent source, but failed to consider
something else. Something about fuse & CB's in series maybe?
Can you detail what happened to take down both LSE's? It's likely that sketch will
be necessary.
Thanks,
Bill Jones
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=407730#407730
Message 5
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| Subject: | Re: How to lose both ignition systems? |
At 03:29 PM 8/29/2013, you wrote:
><jonesw@mindspring.com>
>
>Bob, I was at your seminar at EAA431Brodhead, WI this Spring.
>
>There was a discussion on an accident involving a Lancair Dual LSE
>Ignition failure. I could not find it in a simple NSTB search
>assuming I even have enough details right to do so.
>
>The builder had supplied each LSE from an independent source, but
>failed to consider something else. Something about fuse & CB's in series maybe?
>
>Can you detail what happened to take down both LSE's? It's likely
>that sketch will be necessary.
Yes. That case settled a few weeks ago. I'm going to publish
my reports and demonstration videos that were produced in
support of the technical analysis. I need to 'sanitize' them
a little so as to avoid causing unwarranted discomfort on
the part of the participants.
In any case, it is unlikely that anyone here on the
List would repeat the error . . . an error that grew out
of a combination of 'redundancy' features stacked on top
of each other combined with a poor selection of components
wherein both systems shared hardware in the power path.
Run each ignition from a separate protective device on
the battery bus . . . or separate battery busses if there
are two batteries. Simple, direct, no shared hardware
and truly redundant.
Bob . . .
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