The 1.7MHz module is easy to remove from the chassis, but not so easy to refurbish,
owing to the cramped nature of it’s design. This is largely due to necessity. Although
it is generally referred to as the 1.7MHz module (because it contains the 1.7MHz
crystal oscillator), it also contains the second VFO amplifier as well as the third
and fourth mixers! I was fully expecting to find a few horrors inside due to heat
L300/301 sub assy.
1.7MHz Osc. Etc.
same screws which retain the second mixer tag-
L302 (in conjunction with C308A) forms a 1.6MHz rejection filter. This is explained in para. 26 of the alignment procedure in the RA117 manual.
The 0.1uF capacitor just above the screen in the final photograph is across the heater line and is a new addition.