[R-390] MC/KC knob dancing

Wed, 4 Jun 2003 14:06:19 -0400

Todd,
there is a stainless steel "leaf" springy thing in the front of the RF deck
which presses into the notches on the differential gear plate (I think),
thus holding it in place when the KC knob is tuned.

If the tension is insufficient it will allow slippage; the tension is an
easy thing to adjust. On the other hand the spring could be cracked; I had
this problem in my EAC and replaced it.

Not a big problem, but if the MC knob turns it means the cams are moving too
which will affect the RF alignment.

John
KA1XC

----- Original Message ----- 
From: "Todd Bigelow - PS" <[email protected]>
To: <[email protected]>
Sent: Wednesday, June 04, 2003 1:11 PM
Subject: [R-390] MC/KC knob dancing

> Okay, now for something completely different....
>
> Can someone tell me what the correct term is for the phenomenon
> exhibited when the MC knob slowly turns when the KC tuning knob is
> turned? I noticed this the other day on my Teledyne which has been
> sitting for a while unused. Also, what causes it? I know the gears are
> obviously crudded up since I've not yet done the complete tear-down, but
> specificially is seems like a type of clutching taking place?
>
> Yep, I know - it's been mentioned before. I've just forgotten. They say
> the mind is the second thing to go, can't remember what the first one
> is.....
>
> de Todd/'Boomer',  KA1KAQ