[Boatanchors] P&H LA-400 linear

[Ron VE8RT]

They're not tubes i have on hand, but I'm open to recommendations.  I
can see the four 807s wouldn't be that efficient, unless the point was
to heat the shack, at over thirty cents per kilowatt hour for our
electricity their are cheaper ways to do that.

    Ron VE8RT

On Fri, 16 Aug 2019 06:20:47 -0500
Rob Atkinson <ranchorobbo at gmail.com> wrote:

> 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.
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-- 
Ron VE8RT <ve8rt at yknwt.ca>