At 02:38 PM 5/7/97 EDT, you wrote:
>Hi gang...
>
>I actually read Tom's response and laughed so hard that I accidentally
>deleted his message.
>Blown filaments are absolutely possible due to an internal tube failure.
>Consider the failure a parasitic, gas, lousy assembly, etc. Any one of
>those can do it.
Far more filaments have been blown from the above than with inrush current.
>A case in point is the huge number of Svetlana 572B's with blown filament
>failures....I had a least 2 dozen happen to me and my customers. Put them
>in a known stable amp such as a SB-200, turn it on and everything looked
>fine. Key the relay with NO DRIVE and "Bang". Svetlana has acknowledged
>the stability problem and has redesigned the tube. It was an acknowledged
>parasitic problem based upon internal geometry, not gas or poor
>construction.
>
>I feel that Tom's response is irresponsible and is strictly a
>MFJ/Ameritron CYA smoke screen.
More than one of us would like to know a description of the parasitic
suppressors installed on the AL-811 amp!
>My congratulations to Svetlana for not only quickly responding to the
>problem but also admitting the reason. Eimac, etc could learn a lesson
>about customer relations.
Here Here!....well said, Carl!
(((73)))
Phil, K5PC
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