02-03-2006, 07:08 PM
You'll want to connect to the RF output as I described earlier. For now, disregard the EXT MOD (this is for external modulation, which for this purpose you won't be needing).
The RF signal level (millivolts) should be set at midrange to start - you can vary it as you need to, but that's a good starting point. I don't have one of these generators, so I'm going to assume CW is for "carrier wave" and MCW is for "modulated carrier wave". Anyone here, feel free to chime in to correct me.
To make sure it works the way you want, use a known good radio and set the frequenct to 1400 Khz with internal modulation (which should have a 1 Khz tone), and tune the radio to that frequency. If all is well, you should get an audible tone through the radio, good and strong. Then try setting for 455 Khz and tune the radio to the far high end of the dial. This is your method of confirming the IF frequency. In practice, when aligning the set, you'd do the IF alignment as the first adjustment.
I don't remember what the IF is for the 37-650 off the top of my head, but it's printed right there on the schematic - obviously, that's the frequency you'd use. For your starting point, set it for that frequency, tune to the high end (tuning cap plates open full), and you should hopefully have tone. If not, we'll talk you through the next step.
Best of luck!
Bill
The RF signal level (millivolts) should be set at midrange to start - you can vary it as you need to, but that's a good starting point. I don't have one of these generators, so I'm going to assume CW is for "carrier wave" and MCW is for "modulated carrier wave". Anyone here, feel free to chime in to correct me.
To make sure it works the way you want, use a known good radio and set the frequenct to 1400 Khz with internal modulation (which should have a 1 Khz tone), and tune the radio to that frequency. If all is well, you should get an audible tone through the radio, good and strong. Then try setting for 455 Khz and tune the radio to the far high end of the dial. This is your method of confirming the IF frequency. In practice, when aligning the set, you'd do the IF alignment as the first adjustment.
I don't remember what the IF is for the 37-650 off the top of my head, but it's printed right there on the schematic - obviously, that's the frequency you'd use. For your starting point, set it for that frequency, tune to the high end (tuning cap plates open full), and you should hopefully have tone. If not, we'll talk you through the next step.
Best of luck!
Bill
Sent from my Pentium II on the AT&T Dial Network
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