Contemplating building a tetrode linear from the accumulated treasures of
years.
Thinking back on the 30S-1 approach, and amateur as opposed to production
budgeting.
Thoughts:
If one is starting from scratch with things accumulated from junk sales
(with an aging ham population used equipment seems to be a buyer's market!)
then a power supply made by stacking a frinstance 400V @ 1A peak with say
3kV@ 1A peak is not such a bad concept : the screen load is trivial, one is
basically making a slightly unorthodox anode supply.
Again, tuned chokes are not such a big deal, and maybe plain choke input
with a generous reservoir capacity and generous bleed current might show
almost as good dynamic regulation. After all tetrode high fi audio amps run
low distortion (albeit with negative feedback) with typically simple power
supplies.
And if sensors were put in the screen feed line the same protective
circuitry that Ian uses could apply.
Admittedly this is a brute force approach, but seems quite attractive to
this crude colonial.
Will anyone talk me out of this possible folly?
73
end
Barry Kirkwood PhD ZL1DD
Signal Hill Homestay
66 Cory Road
Palm Beach
Waiheke Island 1240
NEW ZEALAND
www.waiheke.co.nz/signal.htm
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