Dave says:
> 1. select an appropriate circuit modeling program
>
> 2. construct a model of the tube in question, parametizing manufacturing
> variances
.
> 3. construct a model of an amplifier circuit in question, parametizing
>component tolerances
>
> 4. discover combinations of parameters, if any, under which VHF
>oscillation occurs
>
>5. construct models of alternative VHF oscillation-suppressing circuits,
>and evaluate their effectiveness and side-effects
The question is how long this will take - especially 1.
Modelling is a very good tool - if the model is right. 'Ay, there's the rub'.
At an international standards meeting, one American guy made a very profound
statement: ' Simulation is like masturbation - the more of it you do, the more
you prefer it to the real thing'. There is a lot of truth in the thought behind
that statement.
73
Peter G3RZP
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