On Apr 5, 2005, at 8:21 AM, Joe Subich, K4IK wrote:
>
> K5PC writes:
>
>> It is obvious that suppressors on an 8877 amp are optional,
>> depending on the design and use requirements.
>
> In essence, if the 8877 is installed as designed - with the
> grid grounded directly all the way around with the proper
> "ring" of finger stock, the tube will not oscillate.
> If, the
> grid is grounded using the pins and long, thin grounding wires,
> it will take off.
Eimac part #135305 is an 8877 grid-grounding collet. Eimac's
development team reported that some 8877s failed from what was
apparently an "oscillation condition" during testing.
Joe -- Are you suggesting that Eimac's 8877 development team grounded
the grid through long thin wires?
>
>
> Proper construction technique is the key.
>
> 73,
>
> ... Joe, K4IK
>
>
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>
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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