KI-209 VOR/LOC/GS Indicator adjustment

Glad it was that easy.. If you actually fly it in hard IFR you may
want to check it on several vor frequencies across the nav band to be
sure the mixers in the 155 are all up to snuff...
denny

kontiki,
you never mentioned your quals to work on an aircraft as far as the FAA
is concerned. The very least an Airframe rating would be required or you
will need to have someone with the Rating sign off your work. Otherwise
the aircraft is not legal for Instrument flight.
The appropriate manual and test equipment would be required as well. You
already mentioned you had the equipment.
Michelle (A&P)

kontiki wrote:

Denny wrote:

This group is big on saving money by "do it yourself" and I am one of
the biggest proponents of that, HOWEVER this is an item where you are
way in over your head...


I don't think so.. I'm an electrical engineer and can explain the physics
of why and how a VOR actually works in minute detail. The calibration
adjustment
is not rocket science and does not require the magical powers of an
aviionics
tech. I just wanted to find out which screw was the VOR adjustment and
which
was the Localizer adjustment on the KI-209.

You all make similar calibration adjustments to your altimiter via the
Kolllsman
setting beroe and during every flight. Tweaks to the VOR calibration are
required from time to time especially if you have replaced a NAV
antenna as I have.

I called a friend who owns an avionics shop and he told me which screw
was the VOR adjustment and I've zerio's it now with a test set another
friend had.

Thanks

Michelle P wrote:
: kontiki,
: you never mentioned your quals to work on an aircraft as far as the FAA
: is concerned. The very least an Airframe rating would be required or you
: will need to have someone with the Rating sign off your work. Otherwise
: the aircraft is not legal for Instrument flight.
: The appropriate manual and test equipment would be required as well. You
: already mentioned you had the equipment.
: Michelle (A&P)

: kontiki wrote:

Remember... what's safe isn't necessarily legal, and what's legal isn't
necessarily save. I've seen *WAY* too much absolutely frightening **** pulled by
certified repair stations, certified mechanics, and certified, calibrated equipment.
Often, all that stuff does is cost a lot of money and leave a paper trail, but in the
end, Cooter the rookie mechanic does the adjustment with a crowbar.

I'm certainly not advocating self-adjustment of the myriad of knobs in the
guts of the radio without knowing what you're doing and having the appropriate
publications to do so, but there's a reason why the LOC/VOR adjustments are easily
accessible. Minor tweaks are just that... minor tweaks. Zero the needle, test fly it
over a few places in VFR, and call it good.

-Cory

--

************************************************** ***********************
* Cory Papenfuss *
* Electrical Engineering candidate Ph.D. graduate student *
* Virginia Polytechnic Institute and State University *
************************************************** ***********************

Hi,

Of course, you drew an arc from various folks. This is RAO, after all!

I'd be concerned about WHY the thing shifted 7 degrees. That's a lot,
given that it was probably once correct. What internal component is
shifting?
This is a modern indicator, not one full of old ratty parts.

So even if you tweek the adjustment to take out the 7 degrees, beware.
That adjustment affects ALL the bearings by the same amount. So what
the
shop would do is check every 30 degrees both to and from. Given
the history, they might check it at a couple of temperatures, too.

This indicator needs to be watched!! You should check it at more than
0 and 180. Would you trust it?

Bill Hale