To produce a reasonable power level as a grid-driven linear, a triode
needs a Mu of c. 3 max. To do this in g-g, Mu needs to be 100 min. This
is why tetrodes are usually more suitable for grid-driven linear service.
>
>this tube will need 3000 volts with 70 volts bias to get 1600 watts in
>class B.
** Class B is not linear.
>how about a 304TL...cool looking tube, and more power..3000 volts..290
>volts bias, gives you 1800 out
> 2 <2@vc.net> wrote:
>
>>I am new to the list so maybe this is a subject that has been heavily
>>covered, if so please direct me to the resources.
>>
>>I am trying to come up with a project to interest my grandson in ham
>>radio so that I will have someone to leave my S-Line to when I am gone.
>> It will take something pretty "cool", to use his words, to impress him.
>> I think a big linear amp for the S-Line would be a relatively easy
>>project (at least in complication of circuitry) and if I use some bog
>>old tubes it will have the "cool" aspect.
>>
>>I have an 833A that I would like to make into a Kw linear amplifier.
>>Probably a grounded grid circuit to make it as simple as possible.
>>
>>Does anyone have any sources for schematics for such an amplifier?
>
>** The sticky wicket is that the Mu of an 833 is a bit low. Thus, to
>drive one takes a bunch.
>>
>>I am not stuck on the 833A however and have been looking at a 4-1000A
>>(for which there are MANY schematics) or a bank of 5@ 813's lying on
>>their sides in an S-Line type cabinet.
>
>** 5-813s sounds good.
>
>>I am open to any suggestions,
>>projects for sale, projects to resurrect, etc. But the main criteria is
>>"Cool", not "efficient"
>>
>>Any suggestions will be greatly appreciated and considered.
- R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K,
www.vcnet.com/measures.
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