[Vlad95]

Bob, this is the wrong sequence to look for problems and setup circuits.
Always start checking the signal path from the end of the circuit.
1) Connect the audio signal 400-1000 Hz to the first grid of the power amplifier - 3S4. Normal sound level in the speaker should be with an input signal level of 0.1-0.5 V
2) Connect the audio signal to the first grid of the amplifier of the first tube - 1S5. Normal sound level in the speaker should be with a signal level of 0.01-0.1 V
(Make the connection through a capacitor 0.1-0.01 nF)
If the audio part works correctly, go to the IF. Connect the signal generator to the radio through a capacitor 100-1000 pF
3) Connect the IF signal 455 (or other according to the specification of your radio) to the IF plate of the tube - 3U4. The normal sound level in the speaker should be with a signal level of 0.01-0.1 V
4) Connect the IF signal to the grid of the IF tube - 1U4. The normal sound level in the speaker should be with a signal level of 0.5 mV-5 mV (or better)
Try to adjust the IF filter T2 to the maximum signal
5) Connect the IF signal to the plate of the first tube - 1R5. The normal sound level in the speaker should be with a signal level of 0.5 mV-5 mV
Try to adjust the IF filter T1 to the maximum signal
6) Connect the IF signal to the grid of the first tube - 1R5. The normal sound level in the speaker should be with a signal level of 0.1 mV-1 mV (or better)
Try to re-adjust the IF filter T1 and T2 to the maximum signal.

And only after these 6 steps you can try to check the correct operation of the RF, adjust the RF settings and check the correct operation of the oscillator.