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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