[Hallicrafters] Dummy antenna for S40 alignment

[Craig Roberts]

I agree with Ed. I painstakingly built an "official" dummy load to 
service a buddy's SX-28 a few years ago and the resulting alignment 
caused a mismatch between the receiver input and "modern" 50 ohm 
antennas. Re-tweaking the receiver straight from the signal generator 
yielded noticeably better reception. Theoretically, perhaps, the best 
thing to do would be to build the dummy load, align the receiver "by the 
book", and then feed it with an antique style 300 ohm (or whatever) 
antenna or run a 50-75 ohm antenna through a 6:1 matching transformer.

I was actually toying with the idea of building an old style open feeder 
line doublet, per Army instructions, for my Hammarlund SP-600 (which has 
a 100 ohm input impedance) and seeing if it would make any discernable 
difference.  Does anyone feed their antique receiver with an antique 
resonant antenna?  If so, how's it work?

73,

Craig
W3CRR