The HQ-150 is a glorified HQ-140. It has a Q multiplier (in addition to the
crystal filter) and a 100 kHz calibrator. It is single conversion. My
opinion is that the HQ-145 is better than the others for general coverage -
except the HQ-180 and the SP-600.

Hammarlund did make a couple of transmitters - the HX-50 and HX-500. They
were a different style and probably more suited to the HQ-170 or other
receiver that specialized in receiving sideband.

I have Johnson Adventurer and it is a good "no-frills" cw rig and would
match up with the 145 nicely.

73, Colin K7FM