Today's Message Index:
----------------------
1. 07:23 AM - Re: Power Generation without Battery (user9253)
2. 08:48 AM - Re: Re: Power Generation without Battery (Robert L. Nuckolls, III)
3. 05:27 PM - Frequency problem update (danielj.billingsley@yahoo.com)
4. 06:39 PM - Re: Re: Power Generation without Battery (Richard Girard)
5. 06:40 PM - Re: Frequency problem update (Kelly McMullen)
6. 08:04 PM - Re: Power Generation without Battery (user9253)
Message 1
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| Subject: | Re: Power Generation without Battery |
I read about the SILENT-HEKTIK rectifier/regulator after Google translated the
webpage to English. It seems that the SILENT-HEKTIK has the same mounting footprint
as the Ducati and the electrical connector is also the same. So installation
should be easy. The cooling fins look to be much higher to give better
cooling. The SILENT-HEKTIK claims to be rated for 47 amps, which is more than
twice the output of the Rotax dynamo. The voltage output of the SILENT-HEKTIK
is 14.2 volts which is also higher than the Ducati 13.8 volts. Although
the Ducati keeps my RV-12 battery charged just fine.
Heat is the enemy of electronics. So the mounting location of the regulator is
important. The fins should be exposed to moving air. The SILENT-HEKTIK is expensive,
but would be worth it if it does not fail.
I thought about cutting a rectangular hole in my RV-12 fuselage skin and mounting
the Ducati regulator with the fins protruding through the hole. The slipstream
should keep the regulator cool. But I am concerned with aesthetics.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=438183#438183
Message 2
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| Subject: | Re: Power Generation without Battery |
>Heat is the enemy of electronics. So the mounting location of the
>regulator is important. The fins should be exposed to moving air.
>The SILENT-HEKTIK is expensive, but would be worth it if it does not fail.
Yeah sorta . . . the early days of semiconductor products were pretty
tense with respect to potential for heat damage. There was a time
when we were cautioned to grip the leads of a transistor with
needle nose while soldering the puppies in lest milliBTUs run
up the leads and toast the critter.
A couple years ago I was working with a supplier of electronic
assemblies to the aviation industry. Don had just finished doing
some mods to the board of a rather complex actuator. He decided
to do a quick look-see for performance at hi temp.
He put the beast into the chamber at 100C and said, "let's get
some lunch." When we came back, he ran it through the paces
and deemed the thing healthy for continued service.
I was surprised at his assertion that (within limits) just
about any modern piece of electronics ought to shrug off
those kinds of temperatures.
The limits being established by how well internal energy
dissipations were managed. The point is that technology
and processes are in existence at this time to fabricate
PM alternator regulators that will live happily under the
cowl which, by the way, is not all that mean an environment.
Unless subjected to radiant heating from exhaust stacks
while deprived of any circulation, temperatures under the
cowl are subject only to transient spiking . . . like
long taxi ops on a hot day . . . or hot soaking at the
pumps after shutdown.
Few items of avionics need forced air cooling any more.
The newer MOSFET regulators run rather cool even at
20A . . . As far as we can tell, the Ducati product
has not be materially updated in 20 years.
The thrust of my studies in the near future will go to
discovery of why and how B&C's product offers can be
leveraged into the 21st century . . .
Bob . . .
Message 3
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| Subject: | Frequency problem update |
A little over a week ago I mentioned I recently purchased a Bose headset that would
not allow me to make a call to tower. I could talk to ground, yet , when
I switched over to tower I got nothing but a loud high-pitched squeal. I wanted
to give an up-date as I have the problem resolved. All it took was going to
Radio Shack and purchased a couple ferrite beads. I snapped one on the coax behind
my radio, started my engine and hit the PTT. It was almost gone but still
a chirp here and there. I shut down and snapped the second one on the coax just
in front of the antenna. Works perfect now. Hope this can help others with
similar problems.Dan B
Message 4
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| Subject: | Re: Power Generation without Battery |
Joe, Have you looked at the aftermarket regulators for Harley Davidson
motorcycles? They're available from Accel among others and the regulators
for the baggers handle 32 amps.
http://www.jpcycles.com/product/381-277
Rick Girard
On Mon, Feb 9, 2015 at 9:21 AM, user9253 <fransew@gmail.com> wrote:
>
> I read about the SILENT-HEKTIK rectifier/regulator after Google translated
> the webpage to English. It seems that the SILENT-HEKTIK has the same
> mounting footprint as the Ducati and the electrical connector is also the
> same. So installation should be easy. The cooling fins look to be much
> higher to give better cooling. The SILENT-HEKTIK claims to be rated for 47
> amps, which is more than twice the output of the Rotax dynamo. The voltage
> output of the SILENT-HEKTIK is 14.2 volts which is also higher than the
> Ducati 13.8 volts. Although the Ducati keeps my RV-12 battery charged just
> fine.
> Heat is the enemy of electronics. So the mounting location of the
> regulator is important. The fins should be exposed to moving air. The
> SILENT-HEKTIK is expensive, but would be worth it if it does not fail.
> I thought about cutting a rectangular hole in my RV-12 fuselage skin and
> mounting the Ducati regulator with the fins protruding through the hole.
> The slipstream should keep the regulator cool. But I am concerned with
> aesthetics.
> Joe
>
> --------
> Joe Gores
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=438183#438183
>
>
--
Believe those who are seeking the truth, doubt those who find it.
-Andre Gide
Message 5
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| Subject: | Re: Frequency problem update |
Sounds like your antenna coax has compromised shielding, that allows RF
leakage. Most likely the ferrite beads mask the problem. A new coax
would likely give same result.
On 2/9/2015 6:25 PM, danielj.billingsley@yahoo.com wrote:
> A little over a week ago I mentioned I recently purchased a Bose
> headset that would not allow me to make a call to tower. I could talk
> to ground, yet , when I switched over to tower I got nothing but a
> loud high-pitched squeal. I wanted to give an up-date as I have the
> problem resolved. All it took was going to Radio Shack and purchased a
> couple ferrite beads. I snapped one on the coax behind my radio,
> started my engine and hit the PTT. It was almost gone but still a
> chirp here and there. I shut down and snapped the second one on the
> coax just in front of the antenna. Works perfect now. Hope this can
> help others with similar problems.
> Dan B
> *
>
>
> *
Message 6
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| Subject: | Re: Power Generation without Battery |
Rick,
Thanks for the suggestion and link.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=438197#438197
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