[Amps] Grid driven Multi-band amp using 4-1000

[R.Measures]

On Jan 19, 2005, at 8:05 AM, Steven J Fraasch wrote:

> Rich:
>
> SPICE is very useful (or almost as good, linear 2 port models) for
> predicting behavior in HF as well as at VHF.  The components, such as
> sockets, chokes, suppressors, large caps and inductors can be quite 
> well
> characterized by performing open/short circuited tests and equating to
> linear n-ports using a decent bridge such as the Autek.  A gain/phase 
> or
> 2 port analyzer is better, but unnecessary.  Once the tank is built, 
> the
> modeling effort is even more accurate, and simpler, because it is now 
> a 4
> black boxes: input stage, tube, output stage and feedback.
>
> I don't have a 200w transceiver; that's not enough gain.

A 100w transceiver feeding the 4-1000A grid through a 1:4 / 50 to 200 
ohm transformer develops 140v-pk across the 200-ohm grid termination.  
This is max drive for AB1.
>
> Steve
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>

Richard L. Measures, AG6K, 805.386.3734.  www.somis.org