CT-1 oscillator

[Noel Page]

- If the scope is sensitive enough, what about using a 1 or 10 meg
resistor on the scope probe input. This will reduce loading.
At a frequency 19 khz you should probably see something.
If you had an oscillator, you could test a scope and determine
what level of signal you could see. Using different input resistors.
- I tried this with a ancient Heathkit IO-18 tube scope.
With a 10meg input resistor, I could see that a 100mv signal at
19 khz.was present.

Jerry Rego wrote:

> I Have a CT-1 That I am trouble shooting and it does not not operate when it requires the oscillator (Hartley) Heath states that this oscillator is tightly coupled and if loaded, every so slightly - like a grid dip meter, the oscillations will stop.   How is one to check the oscillator ?  If you use a loosey coupled counter it will not drive the counter, say if you use a scope, that will measure fown in the mV Range but will cease operation.  I can not determine if I have loaded the oscillator or the oscillator is inoperative.  Thanks in advance   KE7YG  Jerry Rego
>
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