Today's Message Index:
----------------------
1. 12:15 AM - Re: Rochester dual indicator (bouguy)
2. 06:57 AM - Re: No sidetone driving me insane! (rampil)
3. 07:35 AM - Re: No sidetone driving me insane! (keithmckinley)
4. 07:58 AM - Re: Re: No sidetone driving me insane! (Bruce Gray)
5. 08:03 AM - Re: Re: Rochester dual indicator (Robert L. Nuckolls, III)
6. 08:39 AM - Re: 30 Amp switch? (Ernest Christley)
7. 09:03 AM - Re: No sidetone driving me insane! (Joe Garner)
8. 09:06 AM - Re: Re: John Deere dynamo (Ernest Christley)
9. 09:31 AM - Re: 30 Amp switch? (Dale Rogers)
10. 11:30 AM - The accelerating impediments to data retrieval . . . (Robert L. Nuckolls, III)
11. 11:32 AM - COTS (commercial off the shelf) OAT indicator? (Robert L. Nuckolls, III)
12. 01:17 PM - Re: Re: John Deere dynamo (Robert L. Nuckolls, III)
13. 01:56 PM - The Word According to ISO (Off Topic) (Robert L. Nuckolls, III)
14. 06:16 PM - Re: 30 Amp switch? (Bob White)
15. 06:33 PM - Do you suppose this is why elephants are afraid of them? (Robert L. Nuckolls, III)
16. 09:56 PM - B&C alterator problem ()
17. 10:37 PM - LEDs for strobes and position lights (corvairkelso)
Message 1
INDEX | Back to Main INDEX |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Rochester dual indicator |
hi ,
i have a Rochester dual indicator , Oil temp and Oil Press ,
Cessna Part N S3279-1 coming from a 28volts Skyhawk .
i would like to use it but as i have no Parts catalog , am not
able to determine probe and sender references .
is somebody able to help me ?
thanks a lot ,
Guy , Barracuda builder .
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=198887#198887
Message 2
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: No sidetone driving me insane! |
Assuming that the hardware supports sidetone(and I think all intercoms
do), then lessee:
shoddy amateur wiring with obvious failed connectors vs. solid state
radio.....
In all of aircraft, it's not what you want to do, you do what needs to
be done.
Take your time, get it right, and if you can't replace the crappy
molex connectors, at least solder them after crimping
--------
Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=198914#198914
Message 3
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: No sidetone driving me insane! |
sidetone is supported by intercom and radio.
I think I'll pull the radio for a bench test....had enough
Keith
--------
Wizard
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=198920#198920
Message 4
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: No sidetone driving me insane! |
A good crimp with the proper tool is just as good as a solder joint. Now
when you solder a crimped joint you create a single stress joint at the
solder point. Unless you provide some stress/flex relief (shrink wrap tube),
you're asking for trouble down the road.
Bruce
www.Glasair.org
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of rampil
Sent: Saturday, August 16, 2008 9:54 AM
Subject: AeroElectric-List: Re: No sidetone driving me insane!
Assuming that the hardware supports sidetone(and I think all intercoms do),
then lessee:
shoddy amateur wiring with obvious failed connectors vs. solid state
radio.....
In all of aircraft, it's not what you want to do, you do what needs to be
done.
Take your time, get it right, and if you can't replace the crappy molex
connectors, at least solder them after crimping
--------
Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=198914#198914
Message 5
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Rochester dual indicator |
At 12:10 AM 8/16/2008 -0700, you wrote:
>
>hi ,
>
>i have a Rochester dual indicator , Oil temp and Oil Press ,
>Cessna Part N S3279-1 coming from a 28volts Skyhawk .
>
>i would like to use it but as i have no Parts catalog , am not
>able to determine probe and sender references .
>
>is somebody able to help me ?
>
>thanks a lot ,
The S-number is probably one you read off the cluster. That
a Cessna Standards number that I can go look up and tell you
what the specs are for the instrument and probably the Rochester
number it was supplied under to Cessna. It will probably
reference the companion sensors too and those can be
researched. However . . .
Can I try to talk you out of using these parts? You're assuming
that these are good parts in spite of their pedigree. If one
of them is bad now or in the future, where will you get a
replacement? There's a host of alternative gages in the automotive
and aviation worlds that are of equal quality but modern design
and production. Check out these devices:
http://aircraftspruce.com/catalog/inpages/mitchoilpress.php
http://aircraftspruce.com/catalog/inpages/mitchoiltemp.php
http://www.autometer.com/cat_gaugedetail.aspx?ref=search&gid=3723
http://www.autometer.com/cat_gaugedetail.aspx?ref=search&gid=3727
If you're building a 28v airplane, you can easily craft a 28v to
14v down-regulator to supply power to the modern automotive
instruments.
If you REALLY want to use the salvage parts, I'll see what
I can find out for you.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 6
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: 30 Amp switch? |
Dale Rogers wrote:
>
> Re:
>>
>> The header paragraph in the tinyurl.com front page
>> includes the following statement:
>>
>> "By entering in a URL in the text field below, we will
>> create a tiny URL that will not break in email postings
>> and never expires."
>>
>> Are you perhaps thinking of another service?
>>
>> Bob . . .
>>
>
>
> Nope. Just a non-optimal choice of words. After 28 years in the
> computer industry, I have less than full confidence that a free
> service like tinyurl will continue forever. Maybe they are well
> funded by a subsidy from one of Gilby Productions' other operations.
> Maybe ...
>
> Dale R.
He's right you know, Bob. You've got to be able to read computer
industry speak, which doesn't necessarily correspond with any known
language. Words like "never" and "forever" are loosely translated to
"for as long as we feel like it". You should plan accordingly.
On another completely unrelated note, mpja.com has some nice
panel-mounted temp guages for $3.95 that have a remote probe. The
supplied battery will cost that much at the corner drug store. One for
OAT, one for carb temp and half a dozen more for various temps that I'd
want to measure, and I'd still not be into serious money.
--
http://www.ernest.isa-geek.org
Message 7
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: No sidetone driving me insane! |
One thing you might check is where the headset is
wired to. Most radios have a headset AND a
speaker output, they are not the same. Speaker is
muted with transmit and headset has sidetone.
This bit me when I installed a SL30! Still have
to go under the panel and move that pin...
HTH, Joe
keithmckinley wrote:
> "keithmckinley" <keith.mckinley@townisp.com>
>
> Hi,
>
> I've got an Icom a200 radio connected through a
> pm 1200 intercom.
>
> When I got the plane it had no side tone at
> all. Pulled the radio and tried to adjust the
> sidetone pot to no avail. Turned off intercom
> and still no side tone.
>
> I've tried numerous different headsets. I did
> notice what seems to be a disconnected wire(s)
> at the molex connector but don't no if that's
> an issue. The wiring job is shoddy to begin
> with but I'd hate to rip it out and start new
> if it's actually a radio issue.
>
> radio transmits and receives just fine and the
> intercom is awesome at canceling out noise in
> my very loud warbird.
>
> Just hoping for some last chance advice before
> I send the radio out for a bench test.
>
> Thanks,
>
> Keith
>
> -------- Wizard
>
>
Message 8
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: John Deere dynamo |
Robert L. Nuckolls, III wrote:
>
> This critter is good for about 12-15A when turned
> fast enough and assuming that the companion regulator-
> rectifier isn't over-stressed by the higher input
> operating voltage. I've prayed a bit over the
> schematics for an exemplar device . . .
>
> http://aeroelectric.com/Pictures/Schematics/3-Phase_PM_Rectifier_Regulator.gif
>
>
Bob, this is a switching type regulator, isn't it?
I'm using a PM generator, and I'm unsure about the regulator that came
with the kit. From what I can gather, it appears that Harley-Davidson is
still using linear regulators. I'd rather avoid that extra heat and
wear if possible.
--
http://www.ernest.isa-geek.org
Message 9
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: 30 Amp switch? |
Ernest Christley wrote:
> <echristley@nc.rr.com>
>
> On another completely unrelated note, mpja.com has some nice
> panel-mounted temp guages for $3.95 that have a remote probe. The
> supplied battery will cost that much at the corner drug store. One
> for OAT, one for carb temp and half a dozen more for various temps
> that I'd want to measure, and I'd still not be into serious money.
Ernest, was that item # 16370 ME?
Dale R.
Message 10
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | The accelerating impediments to data retrieval . . |
.
>>
>>Nope. Just a non-optimal choice of words. After 28 years in the
>>computer industry, I have less than full confidence that a free service
>>like tinyurl will continue forever. Maybe they are well funded by a
>>subsidy from one of Gilby Productions' other operations. Maybe ...
>>
>>Dale R.
>
>He's right you know, Bob. You've got to be able to read computer industry
>speak, which doesn't necessarily correspond with any known
>language. Words like "never" and "forever" are loosely translated to "for
>as long as we feel like it". You should plan accordingly.
>
>On another completely unrelated note, mpja.com has some nice panel-mounted
>temp guages for $3.95 that have a remote probe. The supplied battery will
>cost that much at the corner drug store. One for OAT, one for carb temp
>and half a dozen more for various temps that I'd want to measure, and I'd
>still not be into serious money.
Absolutely! If Matt were to meet an untimely demise,
what would the future of the Lists and their archives
hold? Same goes for me and aeroelectric.com
In fact, I'm already wrestling with a reorganization plan
for the website and cursing decisions that drove some of
the present configuration. A recent search on yahoo for
"aeroelectric.com" preoduced 42,000 hits. If I alter it
for the sake of 'improvements', no doubt a large number
of archived links will be broken.
I'm resigned to living within the present organizational
structure . . . or creating a new one that mirrors the
old one while improvements will be added to the new
one only.
Ultimately, we're probably best off by anchoring our
short term (5-10 years?) in the functionality of
search engines that update continuously. After a
few years of co-existence, the 'old' section
of the website could be taken down after mirrored
'new' section is adequately scanned and cataloged
by the search engines. But all archived links will
be trashed.
Like the cylinder, 78, 33, 45, wire, tape, cassette
and no doubt the CD . . . staying agile and useful in
the recording, storage, search and retrieval of
information is a never ending effort. Worse yet,
the rate at which things are being replaced is
accelerating.
Hold on to your hats!
Bob . . .
Message 11
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | COTS (commercial off the shelf) OAT indicator? |
At 09:29 AM 8/16/2008 -0700, you wrote:
>
>Ernest Christley wrote:
>><echristley@nc.rr.com>
>>
>>On another completely unrelated note, mpja.com has some nice
>>panel-mounted temp guages for $3.95 that have a remote probe. The
>>supplied battery will cost that much at the corner drug store. One for
>>OAT, one for carb temp and half a dozen more for various temps that I'd
>>want to measure, and I'd still not be into serious money.
>
>Ernest, was that item # 16370 ME?
>Dale R.
Yeah, those critters have been around for awhile. I bought
one a number of years ago to evaluate. That version used
a forward biased diode as a temperature sensor. It was pretty
good for non-industrial/aviation use. There are some new,
more sensitive, VERY linear temperature sensors that could
be applied to products like this. In fact, the would push
suitability of the device's operating range up high enough
to use for oil temperature measurement too.
Next time a put in an order to MPJA, I'll pick one up
and check it out.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 12
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: John Deere dynamo |
At 12:05 PM 8/16/2008 -0400, you wrote:
><echristley@nc.rr.com>
>
>Robert L. Nuckolls, III wrote:
>>
>> This critter is good for about 12-15A when turned
>> fast enough and assuming that the companion regulator-
>> rectifier isn't over-stressed by the higher input
>> operating voltage. I've prayed a bit over the
>> schematics for an exemplar device . . .
>>
>>http://aeroelectric.com/Pictures/Schematics/3-Phase_PM_Rectifier_Regulator.gif
>>
>Bob, this is a switching type regulator, isn't it?
Uhhh . . . I guess you could call it that. It's not the
legacy switch-mode regulator where duty-cycle controlled
switches, inductors, capacitors and catch diodes do high
efficiency voltage shifting.
These are simple series switches that either reduce
throughput by delaying the time between waveform zero-
crossing and the firing of an SCR at the optimum later
time to throttle throughput. It's exceedingly simple
and adequate to the task if not terribly efficient.
These regulators use single junction diodes AND
4-layer SCRs. Total voltage drop in the on-state,
especially in a 14v system chews up quite a chunk
of system efficiency. They're better at the higher
voltages so a 28v version is not quite so bad.
I've often thought about rewinding one of these
things for say 60-80 volts of 3-phase AC output
that would then be rectified and conditioned by
a REAL switch-mode supply. But pencilling the numbers
wasn't a BIG improvement in efficiency and a BIG
increase in parts-count.
>I'm using a PM generator, and I'm unsure about the regulator that came
>with the kit. From what I can gather, it appears that Harley-Davidson is
>still using linear regulators. I'd rather avoid that extra heat and wear
>if possible.
I doubt that any one does a true linear regulator
at these power levels. They HAVE moved from the
pure shunt (waste what you don't need) type of
regulator common to 1970 designs) to a series
configuration that does not waste as much energy
overall. The only heat issue is in keeping the
regulator itself cool . . . and as you can see
in pictures of the various products offered, the
BIG guys are in cast housings with fins. There
are no significant wear advantages between the
various offerings as long as things stay cool
enough.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 13
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | The Word According to ISO (Off Topic) |
At 07:45 AM 8/11/2008 -0700, you wrote:
>
>Bob et al.,
>
>I too had a thousand similar experiences in industry. Recently in the
>Worcester Business Journal I published a rebuttal to a "Business Leader"
>who believed the solution to all our problems is to hire more foreign
>H-1B's. (For anyone interested I will email you my flame job).
Yes, I'd like to read it . . .
<snip>
>My advise to young engineers/designers: Don't work for ANY company for
>more than five years unless you own a serious piece of it. Period. Don't
>even think about it. And as soon as you can, start your OWN company. You
>might not make a fortune, but you won't have to work for jerks and you'll
>wake up in the morning with a contented soul, happy to start the day.
My approach has not been so direct . . . but in the same
spirit. In my capacity as subject matter lead I was tasked
several times by the chief scientist at RAC/H-B to take new
hire EE's on a familiarization tour of the facilities.
I would take them to places that their hire-on job might
never go. They needed to be aware of every activity/opportunity
on the square-mile . . . ESPECIALLY those opportunities to
get their hands dirty working on a real life project!
At lunch, I would inquire as to the vision they have for
their own future, "What would you like to be doing 5 years
from now?"
These discussions would go into quite a bit of detail and
I would let them know where things on the square-mile might
support their goals . . . as well as any inability of the
current organization to support those goals.
Several times during our encounter I would re-enforce the
notion that everything they'd done up to now was but
the beginning of their education. If at any time they
found themselves stagnant in the acquisition of new
knowledge/skills, it was time to re-assess the relationship.
I told them to call me at any time and I'd arrange lunch
with the chief scientist to discuss how we (the company)
and the disenchanted engineer might set things back on
track. If it could not be done, they were given to understand
that the chief scientist, myself, and perhaps a dozen others
within the organization would help them make a useful
transition to another situation, even if outside the company.
>"THE VERY BIG STUPID" is a thing which breeds by eating
>The Future. Have you seen it? It sometimes disguises itself as a
>good-looking quarterly bottom line, derived by closing the R&D
>Department.
>--Frank Zappa
We sorta avoided looking like a financial albatross by
placing contract testing facilities under the auspices
of engineering. It was gratifying to see that we always
showed a positive cash flow at the end of the year . . .
We also got "credit" for stopping the bleed when a
field failures problem was resolved through the efforts
of our in-house talents.
Bob . . .
Message 14
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: 30 Amp switch? |
On Sat, 16 Aug 2008 11:39:08 -0400
Ernest Christley <echristley@nc.rr.com> wrote:
>
> On another completely unrelated note, mpja.com has some nice
> panel-mounted temp guages for $3.95 that have a remote probe. The
> supplied battery will cost that much at the corner drug store. One for
> OAT, one for carb temp and half a dozen more for various temps that I'd
> want to measure, and I'd still not be into serious money.
>
>
Not so fast Ernest. I found that item, at least I guess it's the right
one. "Requires 1 "LR1130" button cell. (Not included)", so you've
probably doubled your cost. :)
Bob W.
--
N93BD - Rotary Powered BD-4 - http://www.bob-white.com
3.8 Hours Total Time and holding
Cables for your rotary installation - http://roblinstores.com/cables/
Message 15
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Do you suppose this is why elephants are afraid of |
them?
As if bird's nests weren't bad enough, now we have . . .
http://tinyurl.com/5vmasm
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 16
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | B&C alterator problem |
Bob and others -
I have a newly purchased RV8 with a B&C 40 amp alternator and automotive style
blade fuses. Good grounding with a firewall mounted ground bus which is then
routed to the engine. The digital ammeter indicates a running load of 6-7 amps.
The battery is a Concorde dry cell mounted on the firewall. On two separate
occasions the 15 amp alternator field fuse has blown without any additional
or noted transient loads being placed on the alternator. The builder had this
happen to him also and he thought it was the battery so he replaced it. The
new, year old Concorde battery has great cranking power so I am not looking at
this as a potential problem. The only other problem I have noted is when using
all of the lights, strobes, fuel pump and electric flaps the main 40 amp C/B
popped once. Ignoring this as an overload my real problem appears to be the
field fuse. Why does the 15 amp field fuse blow and what's the smartest way
to diagnose this problem? Thank you. JBB
Message 17
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | LEDs for strobes and position lights |
In response to a previous question about using LED for position lights and strobe, check www.luxeonstar.com. I have used their rebel stars in the white tri-emitter powered by their power supply, called a buck puck successfully. The buck pucks imput 12 volts fine and output a fixed current, 700ma in my case. I am using a group of five stars, for about 1400 lumens per side. Luneon III stars are available in both red and green for position lights. Mounting was a challenge, finally using NAPA 549SWD surface mount dome light as a container for them. I used the lambertain style, which is 140 degree of coverage . This is my first posting so please forgive any errors and for being unable to provide an actual link to the referenced web site.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=199040#199040
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|