[ICOM] IC-730 RIT

[D C Macdonald]

RIT Control from IC-730 Service Manual:

Ref No.:      R4
Description:  VR (RIT)
Part No.:     K121B
Value:        10 kOhm

I hope that helps, Randy.

Mac, K2GKK/5
Oklahoma City




----Original Message Follows----
From: "D C Macdonald" <k2gkk at hotmail.com>
Reply-To: ICOM Reflector <icom at mailman.qth.net>
To: icom at mailman.qth.net
Subject: Re: [ICOM] IC-730
Date: Sun, 03 Apr 2005 05:34:12 +0000

I'm away from home for the weekend, but have
a service manual for the IC-730 at home and will
look up the part number when I get home late
Sunday.

Mac, K2GKK/5


----Original Message Follows----
From: "Randall M. Payne" <payner1 at strato.net>
Reply-To: ICOM Reflector <icom at mailman.qth.net>
To: ICOM Reflector <icom at mailman.qth.net>
Subject: Re: [ICOM] IC-730
Date: Sat, 02 Apr 2005 15:59:59 -0500

Dave, thanks for the reply, esp. the info about tightening screws.  I'll 
check that while the rig is apart.  I know the pot is bad and does need 
replacement.  I've emailed Icom and am awaiting a reply.  Hopefully the part 
is available from them.
73,
Randy K4EZM

dave wrote:

>Randy -
>
>I would bet that it needs to be a linear taper pot, based on my tinkering 
>with CB to 10-meter conversion rigs.  Linear taper means that the 
>resistance change is even across the entire rotation of the pot, as opposed 
>to audio taper, where the resistance change is smaller for the first 1/4  
>or so of the pots rotation.
>
>Did you check with Icom America for the part?  I've been surprised that 
>they have had parts for my elderly Icoms.  Also snug down all the circuit 
>board mounting screws while you have the rig apart.  Loose PCB screws will 
>cause a 730 to do all manner of strange things, although probably not make 
>the RIT malfunction.
>
>Dave, N2EPV
>