[month-index] [thread-index] [prev] [next] [thread-prev]

I agree with the previous poster regarding cooling. A method of satisfying
yourself that you need cooling is to purchase a couple of the temperature
indicating stickers.
Then place one on the top of the 430 at about the mid point of the unit.
Place another one underneath the glareshield and a third on the bottom of
the lowest radio. I think you will be surprised at how hot it really is. The
greenhouse effect can kill radios in no time even up here in Canada.

Gary Watson
Avionics AME


"MACKLIN" wrote in message
news:BXMz5.132242$d9.733927@typhoon.kc.rr.com...
> Radio stacks need cooling, usually by a chimney with or without forced air
> flow. The TSO requires a temperature range for reliable operation, if you
> are not exceeding that temperature the unit has a problem, if you are
> exceeding the temperature you have a problem that needs some money to fix.
> Your problem could also be in the audio panel.
>
> $300 sounds very reasonable for a full radio stack cooling system, be sure
> to have each piece connected. Just like your PC, be sure they are clean,
> too. The lower temperatures will extend the life and will not harm
> anything. If it is a temperature problem, a technician can use a heatgun
to
> test different components on the bench to find the bad area. With luck
> there may be warranty coverage.
>
>
> --
> Jim Macklin
> ATP, CFI-ASMEI, A&P
> "Joel R Williams" wrote in message
> news:39CED497.DF4D1D8E@emlinux.com...
> > The COM radio in my GNS-430 has become thermal. It appears
> > that the transmit audio section dies out after about 3/4 hour flying,
> > when the unit is warm. (Ie: cabin temp is over 75 degree F and
> > the temp behind the firewall is well below the spec (55 degrees C)).
> > The unit transmits, but there is weak or no audio.
> > On other occasions, the com receive has been garbled.
> >
> > The unit runs farily warm to the touch, and uses only the internal fan
> > for
> > cooling. It has been recommended that I supply additional air via the
> > 5/8" hole in the back. However, the unit does not seem any hotter than
> > units in to two other planes that I have seen, so I am reluctant to
> > spend
> > $300 to "try" this solution.
> >
> > The unit is about 4 months out of warranty, and Garman wants
> > $600 to do a repair/return on it. Buyer beware!
> >
> > ( I suspect a design problem, so unless they have made design changes,
> > the unit may well fail again. It would be more prudent to put back my
> > old
> > COM radio, and not use the one in the GNS-430. Yuck! )
> >
> > It would be useful to know if others are seeing similar problems.
> > I am collecting info on GNS-430 reliablity problems, particularly
> > experiences on cooling. Please respond to me with your experience.
> > If responses warrant, I will correlate and summarize them on the net.
> >
> > Thank you,
> > Joel Williams
> > joel@emlinux.com
> >
> > PS, Other than this com problem and the $600 flat fee to look at this
> > problem, I love the unit.
> >
>
>

View index by [date] [author] [subject]
Previous Message:: Re: Turbine-powered single
Next Message:: Re: best flight planning software?
Previous message in thread:: Re: GNS-430 thermal reliablility problems???