Jim -
The neon bulb behind the R-4B Main Tuning knob is old, and it's "firing"
voltage has gone up. You have three choices.
1. Remove the Main Tuning knob, and then remove the little tin shield
over the bulb and fiducial that's behind it. Find a replacement NE-2H,
which is the little tubular bulb with wire leads, make sure the glass
bulb is short enough to fit inside the shield. Then pull out the bulb
far enough to get to the wire that is soldered to the bulb leads, remove
the heat shrink insulation and then unsolder the leads. You'll probably
find that the leads are not long enough to pull out, so that you have to
remove the front panel to get to them. Once the new bulb is soldered to
the old leads, shrink tubing applied and shrunk, replace the front
panel, and using your third hand put all the pieces back together again!
- or -
2. Find R150, 100k ohm, 1/2W resistor on the small vertical board under
the chassis just under the PTO. Cut that resistor out. (This is the
'almost official' Drake repair.)
- or -
3. Learn to live with not having the light!
Your choice......
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
<www.k4oah.com>
Jim Gerke wrote:
I have the T-4XB and R-4B set up to transceive with each other, but
have one minor problem that is keeping them from being perfect
operationally and don't know where to begin.......
Assume that both units are powered off and that the Transceive control
on the transmitter to RCVR so that the receiver PTO would control both
units, then power on both units.
The RX PTO indicator light will be on, the TX PTO indicator will be off.
Change the Transceive switch to XMTR and the RX PTO indicator turns
off and the TX PTO indicator turns on.
So far so good.
Turn the Transceive switch back to RCVR and the TX PTO indicator goes
off, but the RX PTO indicator stays off.
The Transceive switch can be toggled between RCVR and XMTR to no
avail. The TX indicator works in the appropriate position, but the RX
indicator stays off regardless.
Note that if the pair is powered up with the Transceive switch in the
XMTR position, switching to the RCVR position will not cause the RX
indicator to turn on, ever.
In a word, HELP!
Thanks.
73, Jim K5JG
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