[Amps] QEX Innovative Tube Linear?

[Will Matney]

Tom,

Only for the 8950 and M-2057 (or Y-2057) as they were the only ones that GE said were for RF amplifier service. The M-2057 was a custom tube that was manufactured by GE. They took an 8908's guts and placed them in a 12 pin compactron base which was what a GE engineer told me. The only specs I have on the 8908 is in a GE tube applications book. I have the GE application sheets on the 8950 and M-2057. All the other sweep tubes were based around TV horizontal output service, however the maximum DC anode voltages still apply. The M-2057 matches several other sweep tubes at 990 Vdc. The 8950 was 800 Vdc. If I recall, the curves on these didn't drop off from a flat line until around 100 Vdc anode voltage. Above this, the line was pretty flat (gradually increasing) up to the maximum anode voltage that was shown on the graph. I think you can download the 8950 PDF from Richardsons along with a few other sweep tubes. The M-2057 sheet I've had for years. These are the same application sheets from the 3 ring binder book from GE.

Best,

Will

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On 7/7/06 at 5:52 PM Tom W8JI wrote:

>>I just looked at the curves for several sweep tubes 
>>including the ones I mentioned, and they didn't start to 
>>bend until around 250 Vdc and below. They were flat from 
>>there on up in voltage until the maximum permissable anode 
>>voltage rating. Running them just at or below the maximum 
>>permissable anode voltage would be recommended. Some 
>>designers of the past tried to run them at a much greater 
>>anode voltage than what the spec sheets say is permissable. 
>>I'll try to post the different maximum anode voltages later 
>>this evening.
>
>Do you actually have an application sheet for these tubes in 
>linear amplifier service Will?
>
>73 Tom