>
>
>> I have a Heathkit Warrior, so are you saying it is safe to remove the
>> neutralization cap?
>
>If you do that, the amp will be like a Collins 811 amp and oscillate
>on 21 and 28 MHz
>
>It would be my advice to leave well enough alone, and NOT take
>misguided advice.
>
> And if so what kind of provision should be made
>> in its place? I have a Warrior that burns up parasitic suppressers
>> and makes loud crackling sound when HV is turned on and biased by a
>> terminal being grounded during tx/rec. I replace the parasitic
>> suppressers, checked the neutralizing gap, and replaced tubes and it
>> still does it. Needless to say its been sitting on the bench for a
>> few months because of frustration.
>
>The oscillation, depending on the frequency, may not be at a
>frequency where tube characteristics change greatly, up above 100
>MHz. If that is the case the neutralization will not affect stability,
>because the grid is effectively not grounded. That mode operates
>the tube as a TPTG oscillator, so the filament (cathode) is not
>involved to any large extent in the problem.
>
>When you changed suppressors, did you use actual carbon
>composition resistors or did you just use regular carbons? How do
>you know the resistors are non-inductive? ..
There is no such thing. All resistors have inductance. The 100-ohm
resistor we use in our parasitic suppressor retrofit kits has c. 11nH.
end
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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