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Old September 6th 04, 10:18 PM
Jay Masino
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wrote:
OK... question for those in the know. I've got a KNI-520 connected to a
KNS-80 RNAV. The DME, localizer, and RNAV *distance* work fine, but the VOR needle
doesn't deflect properly recently. If you try to center it, it won't stay in the
center, but rather will twitch from pegged on one side to pegged on the other with a
very small (5 degrees) change in the OBS ring. I'm thinking that since the head
doesn't have a NAV converter, but rather tells the KNS-80 where the OBS is with
encoder lines, that one of those lines might be broken/intermittent. That would mean
it would think the head is in 1 of 4 (2?) positions, rather than somewhere in between.
Thoughts on this? Anyone fixed such a thing? I haven't torn into the wiring
yet and suspect it's intermittent (read: difficult to find).



I have this exact setup. I'm trying to remember, but I think mine got
twitchy at one point. If I remember correctly, it was mostly twitchy in
RNAV mode (as opposed to VOR mode). I think that's when I replaced my VOR
antenna, and it got a lot better. You're correct about the KNI-520 not
being a NAV converter. The KNS-80 send left/right signals to the head,
not composite video. Some of your other assertions may be valid, but
you'll have do dig into it before you'll know for sure. Good luck.

--- Jay



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