[NLRS] [Fwd: Re: Fwd: 4CX250 Series Conditioning]

Mon, 26 Aug 2002 17:38:00 -0500

The official word from Eimac. Who ya gonna beleive?

73, CJ K0CJ

-------- Original Message --------
Subject: Re: Fwd: 4CX250 Series Conditioning
Date: Mon, 26 Aug 2002 14:03:54 -0700
From: Reid Brandon <[email protected]>
To: [email protected]

The only thing one can do is to operate the heater voltage only (no
plate 
voltage applied) for approx. an hour or longer.
This helps remove some of any residual gas molecules that might be
present 
in a tube that has been in storage for a long time.
You should blow a little air on the base of the tube during this
procedure 
to assure that the temperature does not get too high.
Otherwise there is no special treatment necessary for the tubes before 
operating them in the circuit.
Regards and 73,
Reid Brandon   W6MTF
Applications Engineer
CPI Eimac division
301 Industrial Rd
San Carlos CA  94070

>>Date: Sun, 25 Aug 2002 20:47:10 -0500
>>From: CJ <[email protected]>
>>X-Mailer: Mozilla 4.61 [en] (Win98; I)
>>X-Accept-Language: en
>>To: [email protected]
>>Subject: 4CX250 Series Conditioning
>>
>>I have been told that there is an Eimac recommended protocol for
>>conditioning 4CX250 series tetrodes before attempting to put them in
>>service. Particularly NOS tubes that are often in the hands of amateur
>>radio ops. Can you provide me with this protocol or point me to it
>>somewhere on the web?
>>
>>Thank you very much in advance.
>>
>>Clair J. Robinson, K0CJ
>>3308 Skyview Drive
>>Burnsville, MN 55337
>>
>>[email protected]
>>
>>952 707-9174