Today's Message Index:
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1. 07:14 AM - Re: Re: Special type of charger? (Noel Loveys)
2. 05:45 PM - ISO Amp help ()
3. 07:24 PM - Re: ISO Amp help (Robert L. Nuckolls, III)
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Subject: | re: Special type of charger? |
Thanks Bob. I wasn't able to find anything on the web.
Noel
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Richard
Girard
Sent: December 11, 2010 12:39 AM
Subject: Re: AeroElectric-List: re: Special type of charger?
AGM, Absorbent Glass Mat, and I remember seeing SLA, Starved Lead Acid,
somewhere, too.
Merry Christmas Bob, you're better than Santa Claus. Gifts all year long,
and no reindeer poop on the roof.:-}
Rick Girard
On Fri, Dec 10, 2010 at 9:03 PM, Robert L. Nuckolls, III
<nuckolls.bob@aeroelectric.com> wrote:
<nuckolls.bob@aeroelectric.com>
At 05:24 PM 12/10/2010, you wrote:
Thanks Bob...
Now I have to look up SVLA ;-)
Sorry.
Sealed Vented Lead-Acid, same as: Recombinant
Gas (RG), starved electrolyte, and perhaps
some names I've not discovered yet.
They're often confused with and called "gell-cells"
which they are not. They are also distinct from
a class of "maintenance free" battery used in
the automotive industry which is in fact a flooded
and vented cell that you can't open up to replace
water.
But for the most part, any battery you pick up
that weighs like a brick of lead encased in plastic
is an SVLA/RG/SE battery.
Bob . . .
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Well, my first attempt at the Isolation amp has fizzled.
I've pretty well resigned myself to starting over from
scratch, but I want to make sure I don't repeat the same
mistakes again.
Here's what I get: A lot of distortion when the amp is
powered up. With no power, I can hear the radio softly
through the headset. Power on the amp, it's all
distortion. I removed all inputs from the amp -- radio,
intercom, nav, etc, same thing. All it needs is power.
The d-sub connector is mounted on the solder side, per
the illustrations, so power is pin 8.
I can't find any spots where solder might have jumped
terminals to create a short.
A mistake I did find was that I didn't understand the
polarity aspects of the capacitors, and some were
installed backwards. Once I figured that out, I removed
them and reinstalled them in the correct orientation, but
there has been no change to the distortion. Either the
damage had already been done, or that mistake wasn't the
problem.
Any input would be appreciated.
One bill of materials question: Parts 6 & 7, A24794, do
not appear anywhere in the plans aside from the bill of
materials. Is that the solder-in ic socket that was
replaced by the new machined-pin socket (revision H), or
have I missed something else here?
Brooks
RV-7 details details
Message 3
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Subject: | Re: ISO Amp help |
>One bill of materials question: Parts 6 & 7, A24794, do not appear
>anywhere in the plans aside from the bill of materials. Is that the
>solder-in ic socket that was replaced by the new machined-pin socket
>(revision H), or have I missed something else here?
No, those were optional and used under the amplifier
chips. They weren't on the boards I photographed and
as a result, did not get tied to the BOM tags.
This kind of trouble shooting is very difficult
to do by remote. If you're interested, mail the
assembly to me. I can probably figure out what's
going on in a few minutes. I'll share the process
by which the discovery was made.
Bob Nuckolls
Bob 130
Medicine Lodge, KS 67104-0130
Bob . . .
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