Fred -
Both sound like switching problems. DeoxIT (or your preferred potion) on the various switch
contacts will almost certainly take care of the spot situation. If not, you may need to clean the
relay contacts as well. More DeoxIT on a piece of good paper pulled through the contacts with
pressure applied.
The Calibrator could well be the low voltage supply. There is a diode / electrolytic off of the
filament supply that is used to power the dividers used in the Calibrator, and you may need a new
cap. The 100 kHz oscillator is driven off the same supply as the PTO and BAND oscillators, so you
would still have 100 kHz points, possibly having to bring the receiver antenna lead close to the
oscillator. The Calibrator is located at the rear center of the chassis, and has the large crystal
can that is clipped to the chassis in a spring mount. NOT the crystal with the paint stripe on it!
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>
[email protected] wrote:
/Anyone know where to look to correct the spot function. My Drake B Line transmitter spot function
position works some time and at other times nothing. Sometime a gentle slap will bring it back to
life but I don't like to do that. Any ideas? /
//
/Also Crystal calibrator not working at all. If it is the crystal where is it
located? /
//
/Thanks /
//
/73 de Fred WD8ADG /
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