[R-390] 390 RF Deck Replacing After Removal

[Bob kb8tq]

Hi

You do *not* want to know what the line workers at Motorola thought
about adjusting the PTO linearity. Twenty years later, if you brought up
the R390, you got an earful (and then some) from those gals about just
what a horrible job it was ….

Bob

> On Jan 28, 2022, at 12:42 PM, Tisha Hayes <tisha.hayes at gmail.com> wrote:
> 
> Fiddling with that switch on the bottom of the RF deck is the biggest PITA!
> 
> I had problems with one of my receivers where I had intermittent
> performance on only some of the bands; The radio would go mostly deaf in 1
> MHz positions and it was intermittently happening. The problem boiled down
> to imperfect connections on that switch.
> 
> It was frustrating because you need to do a major disassembly to get to it
> each time you make an adjustment and whatever adjustment you made was not
> always certain to fix the issue. You could get it to disappear on one band;
> only to have it now crop up in a different band.
> 
> It took a couple of days to resolve and I had to just step away from the
> radio a half-dozen times out of frustration; I wanted to toss the entire
> receiver out of the second story window and down in to the yard, where I
> could dig a deep hole and bury the radio.
> 
> I guess that the next level of frustration I could ever possibly get would
> be in trying to adjust the compensator disk on the PTO. Thank goodness I
> had good PTO's with linearity!
> 
> ------------------------
> 
> Tuning racks, stagger tuning the IF, finding the right tube for each
> socket... child's play when compared to that switch.
> 
> Years of therapy have gotten me over the trauma, but I will not even lift
> up one of the spare RF decks and look at the underside... That would give
> me flashbacks.
> 
> *Ms. Tisha Hayes, AA4HA*
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