Mike Sawyer wrote:
Geoff said: So, John has Otis' 833 final in his possession and is going to
replace
the bias transformer, along with re-creating some low-voltage for
regular firing....Never fear, gentlemen(*), if -anyone- on this planet knows
that rig as
well as Otis does, it's a spunky, young, "Boraxo Kid", known as John/WA5BXO.
Do either you or John have schematics for said 833 rig? I'm entertaining the
notion of building a HB rig with an 833 modulated by a pair of 810's and
don't really feel like re-inventing the wheel if a tried and true creation
already exists.
can't go wrong with the tried and true methods that people have been
using for years.
No, I don't think there's a schematic for that rig... one thing to note
though... Otis wound his own link. Instead of the traditional two or
three turn link, he wound a piece of wire in a 'clock-spring' fashion...
starting in the middle and winding, on edge, around 4 or 5 turns through
a piece of phenolic. He claimed that the side-by-side turns kept
arc'ing over, so he wound it like that, instead, and the wire comes from
the middle out to the opposite side, to complete the link.
For neutralizing, he used a small value, high-voltage vacuum variable
capacitor he got from his childhood friend, Koby/K5MZH(sk),
Truly a unique individual, that Otis.
--
73
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