Not sure...Could be filiaments (Hopefully!!)
The mentioned tubes are of different flavours....
Like the indirect heated GU74/GU84/GS35 and direct filiamented 4CX5000A.
I guess indirect heated tubes should have a more 'stiff' heater with
barium-dough around the real filiament...and therefore should NOT move
around like the direct heated ones!
Anyway both type both types 'dik-diks' ;o)
Of course with different 'pitch' etc.
Furthermore, tubes checks out (static-vise), Ie
1) no open filiament.
2) no shorts between elements inside..
3) capacitances as quoted, checks rather fine when measured with cap-mtr...
So I would really like to hear if anyone else can WITH A FULLY functioning
tube of any kind, check if 'dik-diks' and still works perfectly..
So, shake your tubes and tell me if it's same 'dik-diks' for you!!!
If so I will surely sleep well until I can test the tubes in practice..
/Joe
At 18:33 12/04/2002 +0000, you wrote:
>Are you hearing the filaments rattling when you do that?
>> Hi again!
>>
>> Making a repeat of previous question:
>>
>> Having done several 'tube-buys' during the years...
>> But haven't tried this tubes out yet.
>>
>> One thing that I have been observing is that certain tubes
>> makes a discrete 'dika-dika' sound when shaken vertically
>> (tube vertically held).
>>
>> Not the kind of sound that happens when large structures of
>> filiament has fallen down....Or loose matter rattling around.
>> Just something discrete.....soft..
>>
>> 3 out of four 5CX1500A's (so called 'good pulls') gives off a sound
>> when shaken vertically, nothing horizontally...
>>
>> Same story with
>> GU-74B's
>> GU-84B's
>> GS-35B's
>>
>> One big 4CX5000A (Brand new in transportation box).
>>
>> All of them seems to give off that discrete soft sound
>> when shaken VERTICALLY not horizontally!
>>
>> Don't feel like doing an autopsy if there's a normal explanation.
>>
>>
>> Plausible explanation, What do you say?
>>
>> Can anyone verify having a FULLY FUNCTIONING tube even though these
>> criterias are around???
>>
>> Shake your tubes and tell me!?!?
>>
>>
>> "Joe - collecing tubes for a rainy day"
>>
>>
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