Allen -
There are several choices. The original is surgical rubber tubing, which is a translucent amber
colored rubber tubing. It's very soft and flexible, and makes a great 'clutch' material.
Unfortunately after 30-40 years it gets hard and darkens in color. It is difficult to find unless
you have a friend who works in a hospital. If you have a surgical supply store they will often cut
off a foot or so for you, which is a lifetime supply.
Another possibility is automotive 'heater' hose, which is a black rubber, fabric reinforced tubing
available at auto supply stores. Again 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>
Allen Bush wrote:
Does anyone have a recommendation for the little rubber piece that goes behind the dial skirt and
allows the dial/knob to be slipped to calibrate the skirt? Mine have turned hard and are cracking
and turning to dust.... Allen, W0OUU
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