Today's Message Index:
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1. 05:33 PM - Re: Re: Transponder troubles (William J Hamilton)
2. 05:53 PM - Re:Transponder troubles (Kelly McMullen)
3. 09:03 PM - Re: Re:Transponder troubles (William J Hamilton)
Message 1
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| Subject: | Re: Transponder troubles |
Kelly,
What kind of transponder?
Cheers,
Bill Hamilton
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> Pete Christensen <pchristensen10@austin.rr.com> wrote:
>
> <pchristensen10@austin.rr.com>
>
> Not saying this happened to you but my transponder transmitted the wrong
>
> code once. A tech told me to turn the knobs once in awhile because they
>
> can develop a dirty contact since I fly around on 1200 all the time.
>
>
> Pete
>
>
> On 9/10/2011 8:52 AM, Kelly McMullen wrote:
> > --> Avionics-List message posted by: Kelly
> McMullen<kellym@aviating.com>
> >
> > Had strange occurrence with Salt Lake Approach yesterday. Initially,
> > when they said they couldn't see my transponder, I had a reply light.
> > Then they said they could see a 1200 code from it, not the 0363
> > assigned that I had dialed in. A bit later they saw the correct code,
> > and it continued to be okay until out of their airspace. Now I
> > departed the Phoenix area the day before, communicating with 2 radar
> > equipped towers that had no complaints on my transponder and were
> > giving me radar traffic callouts, so I know it was working. Not sure
> > how a transponder could possibly put out a 1200 code when set to
> > something else, and then revert to sending the selected code. I could
> > see one or two digits being wrong, but the whole code? I could only
> > think they had a weak signal, but checked after I landed and antenna
> > was clean. I guess I can check the coax connection, and reseat the
> > unit in its tray, but would rather not have to spend for an
> > unnecessary bench check. It is an old model with cavity tube, but has
> > been rock solid since it was aligned 8 yrs ago, passing every biennial
> > check. Any other thoughts?
> >
> >
> >
> >
> >
>
Message 2
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| Subject: | re:Transponder troubles |
A Narco AT-50.
On 9/11/2011 6:29 PM, William J Hamilton wrote:
>
> Kelly,
> What kind of transponder?
> Cheers,
> Bill Hamilton
Message 3
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| Subject: | Re: re:Transponder troubles |
Kelly,
The reason I asked is that, down here in AU, we have seen some interesting problems
with early King transponders, including transmitting codes other than that
selected, and incorrect Mode C replies.
Some are now subject to to an AD, which effectively means replacement, but I have
not heard of any similar problems with Narco.
Cheers,
Bill Hamilton
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> Kelly McMullen <kellym@aviating.com> wrote:
>
A Narco AT-50.
On 9/11/2011 6:29 PM, William J Hamilton wrote:
>
> Kelly,
> What kind of transponder?
> Cheers,
> Bill Hamilton
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