Re: IIgs to arcade monitor experiment

["Ferdinan Meyer-hermann" <ferdinan.meyer-hermann@a2central.com.remove-yvy-this>]

  To: MdntTrain
MdntTrain wrote:

> 
> Very generous of you to provide a diagram.   Are you using some kind
> of software to make these designs and drawings, like a SPICE
> variant?    I think I'd better get something like it.
> 

I use kicad which is an open-source program. You can get it here:
http://kicad.sourceforge.net/wiki/index.php/Main_Page
It is a full-featured EDA, which means it can also be used to design PCBs. 
I designed the VGA adapter PCB with it.
> Curious about two things:
> 
>  1) is this common base amplifier an inverting amp?
It is non-inverting. To find out, how it works, assume 1 volt at the input
and see what happens. Then assume 0V.
>  2) is there an analog to this voltage amplifier common base
> configuration using tubes instead?
That's called common-grid configuration. It's nearly only used with triodes,
as am amp for VHF/UHF and above. Nearly every non-solid-state-TV-set has a
common-cathode stage followed by a common-grid stage (called "cascode
configuration") as the VHF input stage, and a single common-grid stage as
the UHF input stage. 
In color TVs and monitors, the picture tube is always run in common-grid
configuration. 


Ferdinand
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