The DD-101H Digital Dial installs in all Hammarlund
models that have an opening for a clock, and provides
digital readout to either 1KHz or 100Hz resolution. A
TCXO is used for the reference frequency which makes the
dial highly accurate and stable. The DD-101H is
potentiometer programmable for any Hammarlund model.
Operation is automatic, there are no controls or operating
instructions. The dial can be calibrated to compensate
for receiver misalignment or crystals that have aged.
Installation is possible