[R-390] R390-A questions

[Bob Young]

I just acquired an 390-A, which was done over by an expert, On the third 
time going through the bands I felt something happen to the feel of the the 
megacycle change knob, like something came loose. To make a long story short 
(after a few days) I found that one of the little springs that hold the two 
large gears together immediately inside the radio had come loose and had 
fallen out. I found it and reinstalled it but now the first two bands do not 
work correctly unless the megacycle change knob is tuned lower than the 
click stop (or whatever you call it). The feel of the knob is definitely not 
right especially when I go from 1 to 2 megacycles, there are two distinct 
clicks. A few of the other bands also sometimes need to be fooled with 
(megacycle change knob rocked back and forth etc.) to come in right. It 
seems to me that the space where the springs are in between the two gears 
comes too close together at a certain point and this is when the spring 
falls out. Does this indicate worn parts? Also is this a major undertaking 
like it seems it would be?
A few other questions, is it normal to have rezero the dial between bands 
with a newly aligned radio? And also is it normal to hear sideband artifacts 
on strong locals as far away as 10 khz on either side of the station with a 
400' antenna no matter which selectivity position is used or was this thing 
knocked back out of alignment? Thanks,

Bob
Millbury, Ma