I know these are general coverage, but what sort of performance can one expect out of one of these receivers on the amateur bands when compared to something like a hallicrafters sx-110, assuming that both are properly restored? It would be interesting to see how top of the line in the 1930s compares with the middle end of the receivers available 30 years later, maybe even a comparison between the early super-pro series and the last of the hq series. Also, what sort of prices would one expect to pay for a local non-working super-pro with the power supply?

Since the external PS means a SP-400 or earlier that narrows it down a bit.

The SP-10 is very scarce and not without design flaws. Makes a good shelf queen.

The SP-100 is better, has an early version crystal filter in the X versions and has the infamous Hammarlund drift which can be somewhat corrected without hacking.

The SP-200 and all its WW2 clones has the same drift and the BC-1004 goes to 40mc The crystal filter is the best design of all brands and continued well into the HQ family.

The SP-400 has temperature compinsation which reduces the drift and also goes to 40mc.

I have a SP-100X, BC-1004, and SP-400 (filter was standard and X signifies a crystal controlled oscillator option)

They will all run circles around a SX-110 to a bit above 20M but then the noisy old tube limit sensitivity. There are cures for that also. With a digital readout the lack of calibrated bandspread is not a problem and they are nice radios to use, even in heavy QRM.

The HQ-120X/129X are nice radios but dont have the continuously variable IF and the great audio. They are also a bit deaf above 20M as built. The 140/150 are fairly decent on 15/10M but all of them with just a single RF stage and a 455kc IF do have image problems as frequency goes up.

Its not fair to compare with the double/triple conversion sets. I have most of the HQ series.

Carl