Adjusting it would be a lot simpler with using an adequate frequency counter. Fortunately I have a couple of those. A good dual channel oscilloscope could also be useful.

 

A 1% pot adjustment gives ~7.5kHz frequency shift. 1% or less is almost impossible to achieve reliably with the pot value shown. You really need both coarse and fine adjustment pots, e.g by having a 1k pot in series with the 10k pot.

 

Probably it will be good to check that both oscillators are functioning. If you have a digital multimeter, use the AC mode and a small value capacitor, like 0.005 mfd, to probe the IC gate output pins to verify oscillation.
Trying to adjust the frequency of a dead oscillator is really frustrating. If it is oscillating you will read some steady AC voltage. Of course, probing the output will also change the frequency.

 

If it is oscillating you will read some steady AC voltage.

Would the average DMM have sufficient bandwidth capability to do that at 750kHz?

 

An average DVM should have the ability to get some reading. Not looking for an accurate voltage reading, merely the indication of an oscillating signal.

 

Probably not. The AC voltage accuracy of my Fluke 77 is rated to 500 Hz or 1 kHz, depending on the range.

ak

 

Is that for accurate readings?? How about for signal presence sensing?
Add a series diode and a shunt capacitor and then it can sense a high frequency square wave fairly well. The only purpose is to see if te oscillator is running. OR does the TS have a scope? or frequency counter? those would be better choices. But less likely.