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[AMPS] Tuning of amps - 3cx800s,etc..

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Subject: [AMPS] Tuning of amps - 3cx800s,etc..
From: (Rich Measures)
Date: Sun, 15 Mar 98 16:06:04 -0800
>On Sun, 15 Mar 98 12:35:50 -0800 Rich Measures <> writes:
>>- Eimac publishes no maximum grid-current rating for high Mu triodes, 
>>nor recommends  specific grid currents. 
>The 3CX800A7 Eimac sheet recommends as "typical" 36ma  CW  and 16ma two
>tone grid currents at an Ep of 2200VDC. 
>Similar recommendations exist for numerous triodes; 3-500Z, 3-1000Z, etc.
"Typical" means neither "maximum" nor "recommended", except possibly 
within the Conyers city limits.  

>Maximum currents are not specified in the sheets but I have a copy of an
>Eimac letter to Amp Supply stating that 50ma is the absolute limit for
>the 3CX800A7. 

50mA is not even close to the rated 5w max.  grid dissipation, Carl.  How 
about e-mailing me the JPEG image of this Eimac letter?   

BTW, I need some kaput 3cx800A7s to autopsy.  If anyone has any, I will 
pay the cost of mailing as well any semi-reasonable gratuity.  


R. L. Measures, 805-386-3734, AG6K   

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