[Amps] TV sweep tubes and 6146s

[Will Matney]

Tom,

There's been a few built with them, just not any legal ones that I know of. The reason being is that some of the sweep tubes have greater power out than the 6146B did. Four M-2057's or 8908's would yield about 1000-1200 watts PEP out running grid driven. A 6LF6 or 6KD6 would do a little more too but not as much as the M-2057. The 8950 was just a 6LF6 with a 12 volt heater. If you do build one, with 6146's let me know how it goes. I'm curious myself what you would get out of four of them. Those are still being made out of China and I think they're a good bit of surplus left.

Best,

Will

*********** REPLY SEPARATOR  ***********

On 8/10/05 at 6:54 AM Tom Bowman wrote:

>What is the reason amplifiers never seem to be designed using  four 
>6146s instead of TV sweep tubes like for example, four 6KD6s?
>I must be missing something obvious here.
>
>I'm asking because I'm thinking of building a 400W or so PEP amplifier 
>for 75 and 40 meters.
>
>Keeping cost really low is one of my goals here and I have several good 
>6146s in the junk box.
>
>
>73,
>
>Tom, WA3REY
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