[NJARC] Post manufacturing mods

[Edward Otte]

Hello group,

So I made a complete chassis buzz out and I did find there was some variance
with the original schematic. I have a few question, the first is the
obvious. How often do these chassis deviate from the original design with
secondary modifications? How do I know they are good, bad, or indifferent? 

The specific changes are an additional capacitor in parallel across the
output of the audio class B push pull amplifier. According to the schematic,
a 0.003 mF cap was present and it appears someone wanted more capacitance
and placed a 0.007 mF across it making for a neat 0.01 mF total. Was this to
cut down on noise? Is this OK? 

Another change was the addition of a capacitor (0.02 mF) in between the two
inputs to the class B output audio stage. I mean it goes right across the
secondary of the transformer of the driver stage. What would this be for?
Wouldn't this cut down on frequency response? 

Also in an unrelated question, I see I have an open coil coming from the RF
amp and an open coil (secondary) going to the 1st detector stage. Any input
on how to fix this? I see someone before me did a blob job on it. Should I
just re-flow it? Or may I cause more damage than good?

Thanks as always.

Edward