>
>On Fri, 4 Sep 98 11:00:39 -0800, Rich Measures wrote:
>
>> A dipmeter is useful for making this determination.
>>- later
>
>Hi Rich,
>
>I am curious about the way you would couple the GDO to the screen under
>this situation. I think that this test
>would be very useful. Both with the inductance and without, as in the
>case under discussion.
>
Indeed. ... For an 8281 or 8171, from the bottom of the SK-300A tube
socket one may be able couple a dipmeter coil to one of the (typically 8)
screen collet grounding straps that traverse the airway. . . It is my
opinion that operating a tetrode near or above its grounded-screen
resonance is an open invitation to parasitic oscillation.
- later, Shawn
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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