[R-390] 390a - Switch Wafer Alignment

[Bryce Ringwood]

Hi all,

Pulled the RF section and crystal oscillator last weekend to try and
cure one or two irritating faults, particularly that of having to rock
the wavechange switch on the bands 11 to 17 MHz to get reception. On
close inspection of the switch wafers in the crystal oscillator, I
noticed that they are out of alignment, with the front wafer being
displaced sideways just enough to make contact unreliable. The contacts
on the low range and high range are good. The question is, how easy is
it to realign the wafer ? It needs to ne moved about 0,5 to 1 mm sidways
- is there enough play on the mounting screws ? and has anyone else had
this problem ? Amazingly, the switches and contacts all look bright and
shiny and new.  Once this is fixed, the only remaining problem will be
intermittent low sensitivity on the 0,5-8 MHz range which almost always
presents itself after switching to the 0,5 to 1 MHz range. (Doesn't make
sense to me, but it might to one of you.)

73s - Bryce

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