[Hallicrafters] SX28 sensitivity

[Jim Brannigan]

If all the resistors aged at the same rate, your theory would hold.  Since
they don't, the various voltages will be out of Spec.
If higher line voltage is a concern, it would be better practice to drop the
voltage at the power supply and replace out of tolerance resistors as
required.

Jim

>
> I guess it depends on your point of view.  Of course, if performance
suffers
> from original specs and a resistor is the problem then by all means change
> it.  However, if the performance of the radio is where it should be, leave
> them alone even if out of spec.
>
> In addition, (you may think I'm crazy with this statement), when a
resistor
> goes bad, its value usually increases.  Since the dates of manufacture of
> these radios was during a time of lower line voltages, I figure, the
higher
> resistances are a good thing (within reason) to keep DC supply voltages
> fairly close to original design specs.  In other words, with today's
higher
> line voltages, the increase in resistor values might just be OK.  Changing
> high value resistors to lower values with today's higher line voltages may
> just be the wrong thing to do.  Am I crazy?
>
> K2WH