[Boatanchors] P&H LA-400 linear

[Rob Atkinson]

GG usually takes more drive power for a given output power.  The
schematic someone posted was 807s grid driven.  It was a complicated
looking design compared to a cathode driven g.g. triode, but I assumed
the point to it was to have a high gain 100 w. amp that could be
driven by a dinky QRP rig.  If I were doing this and wanted such an
amp I'd go with a single 4-65A or 4D32 and forget about a lot of 807s.
If I were looking at cathode driven I'd try a single 812 or maybe
572B.

Rob
K5UJ

On Fri, Aug 16, 2019 at 2:35 AM <hwhall at compuserve.com> wrote:
>
> Advantages of grounded grid, if I recall correctly, included not needing neutralization, and driver power not needed for drive was passed thru to the output.  IIRC.