[Hallicrafters] SX-117 engineering changes

[Jim Liles]

Luis:

This may be of interest to you:
If you are interested in the EC level of your SX-117, go to www.k9axn.com and go to SCHEMATICS. Near the bottom, you will find schematics that represent the five EC levels (A thru E) of the SX-117.

You can update your radio if you feel it important or even remove some changes.
I prefer the removal of one change. If you have an SX-117 that is the "C" level or better, you will find that the S-meter sees things that are not audible. The AGC band width is much wider that the signal bandwidth. 

The "C" to "D" change significantly improves the strong signal adjacent frequency de-sensing. Does the radio need this change? I have never experienced De-sensing so I remove just the "B" to "C" AVC sense change. With that the S-meter functions as I am accustomed, it moves when there is something that is audible. 

This is simply my personal preference. All of the other changes that represent the "E" level are worth installing.

A super day to you ---- Kindest regards Jim K9AXN