Thanks to all who mentioned the encoder. Do any of you remember how
much it cost to have the encoder replaced?




Doug Vetter wrote:
Jimmy B. wrote:

I have a King KT76 transponder that has picked up a little problem.
It takes about 10 minutes before it starts transmitting the mode C
information. ATC is getting the transmission alright, there is just
no altitude information.

snip

I agree with everyone else. It's the encoder. Had the same thing
happen a year a couple years back.

I'll add the following recommendations:

1) buy a new encoder -- don't try to repair the existing one. It rarely
makes financial sense. The ACK is the least expensive. The Sandia the
most expensive. They differ in maximum approved altitude, number / type
of outputs (serial vs. gray code), and features (the Sandia has an
altitude monitor and 10' resolution).

2) if you have any plans to upgrade to a GPS or transponder that can
utilize it, buy an encoder that provides 10' resolution. They're a bit
more expensive, but they're worth it, IMHO.

-Doug

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Doug Vetter, CFIMEIA

http://www.dvcfi.com
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