Today I placed the scope at the SPEAKER OUT jack to see what is happening closer to the listeners ears
- generated a 400 Hz 100 mV SINE wave (as before, checked that the wave took about 2 divisions of the scope's screen when set at 50 mV/div)
- connected a 4 Ohm Dummy load
- probe connected to the SPK OUT tip and ground connected to chassis
This is what I've seen:
1) The following settings show a SINE wave similar to the one at the input
VIBRATO CHANNEL VOLUME @ 2
TREB, MID, BASS indistinct
MASTER VOLUME @ 5
2) Now, this is what happens if the BRIGHT SWITCH is turned on (this effect is independent of the presence of V1 or V3 in the circuit or the REVERB IN connector plugged or unplugged). All other settings as before
3) Turning the BRIGHT SWITCH OFF and with all settings as in point 1, I increased the VIBRATO CHANNEL VOLUME from 2 to 10
4) Keeping the VIBRATO CHANNEL at 2 and all other settings as in the first point, changed the MASTER VOLUME from 5 to 10
- generated a 400 Hz 100 mV SINE wave (as before, checked that the wave took about 2 divisions of the scope's screen when set at 50 mV/div)
- connected a 4 Ohm Dummy load
- probe connected to the SPK OUT tip and ground connected to chassis
This is what I've seen:
1) The following settings show a SINE wave similar to the one at the input
VIBRATO CHANNEL VOLUME @ 2
TREB, MID, BASS indistinct
MASTER VOLUME @ 5
2) Now, this is what happens if the BRIGHT SWITCH is turned on (this effect is independent of the presence of V1 or V3 in the circuit or the REVERB IN connector plugged or unplugged). All other settings as before
3) Turning the BRIGHT SWITCH OFF and with all settings as in point 1, I increased the VIBRATO CHANNEL VOLUME from 2 to 10
4) Keeping the VIBRATO CHANNEL at 2 and all other settings as in the first point, changed the MASTER VOLUME from 5 to 10
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