Today's Message Index:
----------------------
1. 11:32 AM - Merry Christmas (Robert McCallum)
2. 11:37 AM - Update: Matronics Internet Connection... (Matt Dralle)
3. 11:52 AM - Re: Update: Matronics Internet Connection... (Kurt A. Schumacher)
4. 11:57 AM - Re: Update: Matronics Internet Connection... (Kurt A. Schumacher)
5. 11:57 AM - Re: Re: Turbo pressure to mags? (Jerzy Krasinski)
Message 1
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--> AeroElectric-List message posted by: Robert McCallum <robert.mccallum2@sympatico.ca>
Wishing everyone a happy and safe holiday season.
Bob McC
DO NOT ARCHIVE
Message 2
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| Subject: | Update: Matronics Internet Connection... |
--> AeroElectric-List message posted by: Matt Dralle <dralle@matronics.com>
Dear Listers,
First let me apologize for the discontinuity of List service over the last
two days. There is a faulty transmit pair between here and the "B-Box" and
I have been having a heck of a time trying to get the phone company
motivated to fix it. I am now trying to get them to take one of the analog
phone circuits to temporary get the T1 line circuit up. They are
indicating that to repair the existing T1 circuit they must dig up a
cross-connect in the street which will require a Permit from the City! Who
knows how long that will take to complete.
For now, connectivity is intermittent, but working. Email should flow
fine, although web server access may be a little sporadic. I'm working as
hard as I can at getting the situation resolved, but with the holiday and
all, its just been a nightmare.
I will post more information as it becomes available... Again, my
apologies; I thought upgrading to a commercial-grade T1 would elevate my
connectivity issues once and for all...
Wish me luck!
Matt Dralle
Matronics Email List Admin.
Matt G Dralle | Matronics | PO Box 347 | Livermore | CA | 94551
925-606-1001 V | 925-606-6281 F | dralle@matronics.com Email
http://www.matronics.com/ WWW | Featuring Products For Aircraft
do not archive
Message 3
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| Subject: | Update: Matronics Internet Connection... |
--> AeroElectric-List message posted by: "Kurt A. Schumacher" <Kurt.Schumacher@schumi.ch>
In den USA ist wohl auch nicht alles besser...
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Matt Dralle
Subject: AeroElectric-List: Update: Matronics Internet Connection...
--> AeroElectric-List message posted by: Matt Dralle
--> <dralle@matronics.com>
Dear Listers,
First let me apologize for the discontinuity of List service over the last
two days. There is a faulty transmit pair between here and the "B-Box" and
I have been having a heck of a time trying to get the phone company
motivated to fix it. I am now trying to get them to take one of the analog
phone circuits to temporary get the T1 line circuit up. They are
indicating that to repair the existing T1 circuit they must dig up a
cross-connect in the street which will require a Permit from the City! Who
knows how long that will take to complete.
For now, connectivity is intermittent, but working. Email should flow
fine, although web server access may be a little sporadic. I'm working as
hard as I can at getting the situation resolved, but with the holiday and
all, its just been a nightmare.
I will post more information as it becomes available... Again, my
apologies; I thought upgrading to a commercial-grade T1 would elevate my
connectivity issues once and for all...
Wish me luck!
Matt Dralle
Matronics Email List Admin.
Matt G Dralle | Matronics | PO Box 347 | Livermore | CA | 94551 925-606-1001 V
| 925-606-6281 F | dralle@matronics.com Email
http://www.matronics.com/ WWW | Featuring Products For Aircraft
do not archive
Message 4
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| Subject: | Update: Matronics Internet Connection... |
--> AeroElectric-List message posted by: "Kurt A. Schumacher" <Kurt.Schumacher@schumi.ch>
Sorry, this was not intended to send to the list. We're just facing a similar problem
here in Switzerland ;-)
Seasonal greetings,
-Kurt.
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Kurt A.
Schumacher
Subject: RE: AeroElectric-List: Update: Matronics Internet Connection...
--> AeroElectric-List message posted by: "Kurt A. Schumacher"
--> <Kurt.Schumacher@schumi.ch>
In den USA ist wohl auch nicht alles besser...
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Matt Dralle
Subject: AeroElectric-List: Update: Matronics Internet Connection...
--> AeroElectric-List message posted by: Matt Dralle
--> <dralle@matronics.com>
Dear Listers,
First let me apologize for the discontinuity of List service over the last
two days. There is a faulty transmit pair between here and the "B-Box" and
I have been having a heck of a time trying to get the phone company
motivated to fix it. I am now trying to get them to take one of the analog
phone circuits to temporary get the T1 line circuit up. They are
indicating that to repair the existing T1 circuit they must dig up a
cross-connect in the street which will require a Permit from the City! Who
knows how long that will take to complete.
For now, connectivity is intermittent, but working. Email should flow
fine, although web server access may be a little sporadic. I'm working as
hard as I can at getting the situation resolved, but with the holiday and
all, its just been a nightmare.
I will post more information as it becomes available... Again, my
apologies; I thought upgrading to a commercial-grade T1 would elevate my
connectivity issues once and for all...
Wish me luck!
Matt Dralle
Matronics Email List Admin.
Matt G Dralle | Matronics | PO Box 347 | Livermore | CA | 94551 925-606-1001 V
| 925-606-6281 F | dralle@matronics.com Email
http://www.matronics.com/ WWW | Featuring Products For Aircraft
do not archive
Message 5
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| Subject: | Re: RE: Turbo pressure to mags? |
--> AeroElectric-List message posted by: Jerzy Krasinski <krasinski@direcway.com>
Gary Casey wrote:
".....I think a vacuum is a better insulator than air???....."
Gary,
For a practical distance between high voltage wires in the range of a
few mm, when you change pressure starting from the atmospheric pressure,
the breakdown voltage is proportional to the pressure. At around 5,000
m (~15,000ft) the pressure reduces by a factor of two, and the
breakdown voltage reduces by a factor of two. That proportional
dependence is valid for any practical aviation altitude until you reach
a pressure somewhere between 1 and 0.1 mmHg, which would correspond to
an altitude of sub orbital ionosphere. At this pressure the breakdown
voltage reaches its minimum of less than 100V in air, and this is the
pressure used in neon tubes. If you reduce the pressure further the
break down voltage starts increasing very fast with reduction of
pressure. Vacuum tubes operated at a pressure less than 0.001 mmHg.
The reason for that high breakdown voltage is that there are few atoms
there and electrons can travel the whole distance between electrods
without colliding with atoms and ionizing them.
So, you are right that vacuum is much better insulator than air. But it
is a LONG way to go from any aviation pressure at any realistic
altitude to vacuum.
Jerzy
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