4A
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This Amateur Radio Transmitter was introduced in the October 1933 issue of QST.
It is a crystal-controlled CW-only transmitter capable of 20 watts RF output.
The crystal and associated band-changing coils were plugged from the top of the unit.
The 4A was a kit, and you were responsible to purchase the tubes separately.
Like many home-assembled projects, this unit had no cover - top. sides or back.
