[Drake] TR4: Slop in tuning

[Garey Barrell]

Hi Jim -

Simple fix.  There is a short piece of tubing behind the MAIN TUNING knob and plate. The fix may be 
as simple as loosening the MAIN TUNING knob set screw, pressing 'IN' on the knob and re-tighten the 
set screw.  If it still slips, it may be possible to remove the tubing and sand the ends to remove 
the 'sheen'.  Still slips??  There are several choices for replacement.

Automotive 'heater' hose, which is a black rubber, fabric reinforced tubing available at auto supply 
stores.  They'll often cut off a piece, or sell you a foot cheaply.

Hardware stores also have poly tubing, the clear stuff on reels.  Again, you need a foot or less!

ALL of the above are 3/8" id x 5/8" od.  You need to cut a piece about a half inch long.  More than 
the absolute length, the ends must be cut square and flat.  I use an X-Acto razor saw in the little 
aluminum 'miter' box.  Various types of scissors and cutters will cut the tubing, but usually leave 
a poor end surface due to the tubing collapsing when cut.  But you've got a foot or so to experiment 
with, right?!?!

When you replace the MAIN TUNING knob, push in on it slightly to engage the clutch surfaces and then 
tighten the set screws.

73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>


Jim Lowman wrote:
> I have a TR-4C that hasn't seen a lot of action.  Lately, in spinning
> the VFO dial, I've noticed that it goes quite a distance in either
> direction before it "catches" and the frequency dial moves.
> I assume that this is the age-old dial-cord problem.
>
> I'm thinking of selling this radio, but not sure how much I could get
> with this defect, or if it's a simple problem to fix.
>
> All suggestions are appreciated.
>
> 73 de Jim - AD6CW
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