The following article ``bbagvfo.ps'' is an annotated reprint of an article
from QST in 1947 for a small single tube vfo transmitter.  It is a nice
representation of a minimal low power rig for 80/40 meters.  By scaling
the coils appropriately, two bands may be covered by interchangeable coils.
It should be used with a fairly well regulated power supply to keep chirping
to a minimum.  

This work was presented as a construction project for the Homebrew SIG of the
Raleigh Amateur Radio Society, RARS, in 1993.  It is a typical example of a
late 1930's through 1940's electron coupled Colpits oscillator which can be
used as a stand-alone transmitter or as a VFO.  In the modern era, its use
is rather limited, but it does serve as a good historical example of a fairly
well built, simple electron coupled oscillator of the period.  The best use
of this rig is as a QRP rig for 80 meters, in the long winter nights.....

Permission to use this article was given, courtesy QST.

The original article was by F.R. Nichols, W6JJI, published in the June,
1947 issue of QST, pages 54-55.

The annotations are by Robert D. Keys, NA4G.

Have fun constructing this fine little rig, but be careful of the high
voltages present.  All vacuum tube transmitters will use voltages that
may be dangerous to your person.  So, exercise due care around such high
voltages.

73 TU SU SK DE NA4G
Boatanchor Bob