[Radioroslyn]

If you suspect the osc is not working you can use the SG-8 as the osc. Turn the modulation off and feed a small signal in the to first grid of the mixer tube. To tune in a station the dial on the radio will tune the rf and mixer the SG-8 will act as the osc . So the osc needs to be 455kc above the frequency of the incoming (the frequency shown on the dial) and the dial should be at the incoming frequency. You can use this method on any band you just have to keep the osc at the IF frequency + the frequency of the incoming signal.
Hope this helps
Terry