>
>
>> >The Henry amplifiers using 3-500 tubes are quite mature and stable,
>>
>> ? To the best of my knowledge, the World Record for grid-fil. shorting
>> brand-new 3-500Zs in under one day is currently shared by two 3K-A Henry
>> Radio amplifiers. Both amplifiers reportedly shorted four 3-500Zs -
>> accompanied by stentorian big-bangs. . . I attribute this feat to:
>> 1. no peak fault current limiting resistance [glitch resistor] in
>> series with the high voltage positive lead.
>
>I didn't know you were the "Guinness book" keeper of these things in
>amplifiers.
>Good to know........
>
>My guess is that the amplifier lived through this disaster.
>Defective tubes caused this problem, NOT the amplifier!
>
? Four defective 3-500Z tubes with grid-fil. shorts from Eimac seems
doubtful. If the tubes came with grid/fil shorts, where did the big-bang
and fireworks come from?
- - Always blame the other guy.
(see photo of grid-fil. short on page 15 of Sept., 1990 *QST*).
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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