Today's Message Index:
----------------------
1. 04:23 AM - Re: Re: Always on avionics (Trampas)
2. 06:21 AM - Re: Always on avionics (Glen Matejcek)
3. 08:41 AM - Re: Re: Always on avionics (John Rippengal)
4. 05:23 PM - Need crystals for Genave Alpha/10 (Hopperdhh@aol.com)
5. 09:18 PM - Re: Re: Always on avionics (Tom Brusehaver)
Message 1
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| Subject: | RE: Always on avionics |
--> Avionics-List message posted by: "Trampas" <tstern@nc.rr.com>
I think that is a hold over from the 60's... Look at it this way, they do
not turn off the computer when starting...
Regards,
Trampas
-----Original Message-----
From: owner-avionics-list-server@matronics.com
[mailto:owner-avionics-list-server@matronics.com] On Behalf Of John
Rippengal
Subject: Re: Avionics-List: RE: Always on avionics
--> Avionics-List message posted by: "John Rippengal"
<j.rippengal@cytanet.com.cy>
True enough but the only thing that slightly worries me is that I notice
that all modern autos
switch off the radios when starting. Are they being over-cautious?
John Rippengal
> --> Avionics-List message posted by: "Trampas" <tstern@nc.rr.com>
>
> You guys know that the electronics can be designed such that they operate
> while starting the engine.
>
> Regards,
> Trampas
> www.sterntech.com
Message 2
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| Subject: | RE: Always on avionics |
--> Avionics-List message posted by: "Glen Matejcek" <aerobubba@earthlink.net>
Hi All-
Without wanting to stir the pot too much, I'd like to offer a different
perspective on these issues. Altho avionics CAN be spikeproofed, and some
MAY be, and whatever the heck SHOULD be, I can tell you definitively that
both of my non-certified units and one certified unit recommend against
starting the engine with them turned on, one certified unit says nothing on
the subject, and three certified units say "warrantee void". Makes it
simple for me...
As to idiot proofing, my set up uses parallel busses. The gear on the bus
that DOESN'T carry the cranking loads is, of course, just fine. The bus
that DOES carry the cranking loads has 2 particularly susceptible units -
the stby EFIS and one EI unit. I have wired my starter switch through the
IGN and STBY EFIS toggle switches such that if the stby EFIS or IGN 1 are
on, there is no power to the starter switch. Simple, clean, and minimal
parts count. Meets the KISS requirement for operations, thereby
protecting me (and my avionics) from myself.
YMMV
Glen Matejcek
aerobubba@earthlink.net
> Isn't the admonishment, to never start the plane with the electronics
turned
> on, contrary to the threads that hold that the new electronics are pretty
> impervious to the spikes associated with startup, or did I miss something?
> Or just a difference of opinion?
>
>
> You should never start the plane with your electronics turned on. You
get a
> big inductive spike when ou do that.
>
> I idiotproofed (no guessing) my electronics by wiring a 30-40 amp ice cube
> relay in paralell with the starter relay. I used the NC contacts so that
> when I start the engine all the electronics are DISCONNECTED. If you
> accidentally hit the start switch with the engine running this will really
> save your wallet !
> Leo Corbalis
>
> --> Avionics-List message posted by: "Trampas" <tstern@nc.rr.com>
>
> You guys know that the electronics can be designed such that they operate
> while starting the engine.
>
Message 3
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| Subject: | Re: RE: Always on avionics |
--> Avionics-List message posted by: "John Rippengal" <j.rippengal@cytanet.com.cy>
Fair enough. I'm sure there is no likely transient that can't be contained
these days.
John
> --> Avionics-List message posted by: "Trampas" <tstern@nc.rr.com>
>
> I think that is a hold over from the 60's... Look at it this way, they do
> not turn off the computer when starting...
>
> Regards,
> Trampas
Message 4
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| Subject: | Need crystals for Genave Alpha/10 |
--> Avionics-List message posted by: Hopperdhh@aol.com
If anyone on the list has crystals (or the whole radio since the crystals are
soldered in) to put a Genave Alpha/10 on 122.9 please reply to me off list.
Yes, I know its obsolete, but a friend of mine would like to monitor the local
unicom frequency.
Do not archive.
Thanks,
Dan Hopper
RV-7A Flying since July
Message 5
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| Subject: | Re: RE: Always on avionics |
--> Avionics-List message posted by: Tom Brusehaver <cozytom@mn.rr.com>
All? I have a 2001 Saab 95, and the radios stay on
once you put the key in until you pull it out.
On Wed, 20 Oct 2004 08:53:02 +0300, John Rippengal
<j.rippengal@cytanet.com.cy> wrote:
> --> Avionics-List message posted by: "John Rippengal"
> <j.rippengal@cytanet.com.cy>
>
> True enough but the only thing that slightly worries me is that I notice
> that all modern autos
> switch off the radios when starting. Are they being over-cautious?
> John Rippengal
>
>
>> --> Avionics-List message posted by: "Trampas" <tstern@nc.rr.com>
>>
>> You guys know that the electronics can be designed such that they
>> operate
>> while starting the engine.
>>
>> Regards,
>> Trampas
>> www.sterntech.com
>
>
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