Today's Message Index:
----------------------
1. 02:20 PM - GTR-200 garbeled reception (Marty Hill)
2. 05:05 PM - Does case of ignition switch need to be grounded on Rotax 94 (rparigoris)
3. 08:08 PM - SLICKSTART Current Draw ()
4. 08:30 PM - Re: SLICKSTART Current Draw (David Saylor)
5. 08:50 PM - Re: SLICKSTART Current Draw ()
Message 1
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| Subject: | GTR-200 garbeled reception |
I bought a project Pitts, went through the whole thing and have recently
started having radio issues. The basic problem is that reception
intermittently becomes "noisy" and garbled. There's never noise that
breaks through squelch; normal reception just gets loud, static-y and
unintelligible. (Just what you need immediately after takeoff or on a
go-around.) First problems didn't occur until there was about 10-15 hours
on the new electrical system and radio; the garbled reception seems to
happen more at high power than lower power, but again just not all the time.
Basic aircraft system:
IO-360 / Slick Magnetos
SD-8 PMG, B&C regulator and crowbar OVM
Earth-X battery
LW starter
KT-76A Xpnder and encoder
Headsets inc Noise-cancelling headset power supply
Combo clock/voltmeter/timer/G-meter
GTR-200
-Headset, Mic, Music inputs
GTR-200 troubleshooting:
-Re-seated radio (no effect)
-Tried multiple headsets (no effect)
Aircraft Systems troubleshooting:
-SD-8 - off (no effect) (fuse pulled/switch off) (no effect)
-Propeller RPM drastically reduced (most improvement)
-Transponder on/off (other than physical high-pitched tone from
transponder, no effect)
Airframe troubleshooting:
-Checked antenna connection at both ends (antenna cable made by local
avionics shop)
-checked P-leads and shielding connections at both ends
-Found ring terminal from starter ground-aircraft ground slightly loose,
new ring installed.
-Inspected ignition switch ground (left side of fuse), avionics ground
(right side of fuse, same station)
-Inspected jack connections and checked fiber washers installed
-Removed stereo input jack (non aviation) from panel, tucked away and
insulated it (no effect)
I talked to Garmin and based on the fact it was fine for the first few
hours, and it only tramples reception, never breaks through squelch that it
is probably a bad unit. Any other avenues of investigation are appreciated!
Thanks,
Marty Hill
Message 2
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| Subject: | Does case of ignition switch need to be grounded on |
Rotax 94
Hi Group I have a ACS keyed ignition switch with out starter contact for my Rotax
914. I will be wiring as per Z16 where shields are grounded to engine near
by the ignition modules, then the shields are connected to the ground tab at the
ignition switch. To short the ignition wires to ground, path will be through
the shields to ground at the engine. The body case of the ACS ignition switch
is not connected to the ground tab where the shields will be connected.
My question: Rotax calls for the body case of the ignition switches to be grounded.
In my case do I need to ground the body case of ACS ignition switch? If the
answer is yes, can I ground it to the field of tabs on the cockpit side? Thx.
Ron P.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=498850#498850
Message 3
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| Subject: | SLICKSTART Current Draw |
I have a Slickstart start unit. Manual calls for a 5 amp fuse but my fuse
blows at 5 and 7.5 amp, I have a 12V installation.
Have now installed a 10 amp fuse and all seems to be OK
What could cause the Slickstart to draw more current?
Should I be concerned?
Thanks
Mike
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Message 4
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| Subject: | Re: SLICKSTART Current Draw |
That seems odd. Mine runs off a 3 amp fuse, including the start relay.
There was a bulletin some time back to only run one mag with it. I think
it had to do with making sure the left and right systems were completely
separate, not really a current draw issue. Maybe though...are you running
both mags off a single SlickStart?
--Dave
On Thu, Oct 15, 2020 at 8:15 PM <mike@vision499.com> wrote:
> I have a Slickstart start unit. Manual calls for a 5 amp fuse but my fuse
> blows at 5 and 7.5 amp, I have a 12V installation.
>
>
> Have now installed a 10 amp fuse and all seems to be OK
>
>
> What could cause the Slickstart to draw more current?
>
>
> Should I be concerned?
>
>
> Thanks
>
>
> Mike
>
>
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Message 5
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| Subject: | SLICKSTART Current Draw |
No, I am only connected to the left mag. Right mag is switched off during e
ngine start.
Thanks
Mike
From: owner-aeroelectric-list-server@matronics.com <owner-aeroelectric-list
-server@matronics.com> On Behalf Of David Saylor
Sent: October 15, 2020 8:26 PM
Subject: Re: AeroElectric-List: SLICKSTART Current Draw
That seems odd. Mine runs off a 3 amp fuse, including the start relay.
There was a bulletin some time back to only run one mag with it. I think i
t had to do with making sure the left and right systems were completely sep
arate, not really a current draw issue. Maybe though...are you running bot
h mags off a single SlickStart?
--Dave
On Thu, Oct 15, 2020 at 8:15 PM <mike@vision499.com <mailto:mike@vision499.
com> > wrote:
I have a Slickstart start unit. Manual calls for a 5 amp fuse but my fuse b
lows at 5 and 7.5 amp, I have a 12V installation.
Have now installed a 10 amp fuse and all seems to be OK
What could cause the Slickstart to draw more current?
Should I be concerned?
Thanks
Mike
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