Note
QST, Aug 1934, p. 83.
Radio, Nov 1934, p. 36.
QST, Jun 1936, p. 86. (Discontinued, see ad. Replaced by "The Compact.")
Review: Radio, Nov 1934, p. 13. (In the review, these are described as being made by "Jacobs."
Originally designed for 56 MHz (5 meters), it was made for a time for 28 and 56 MHz (QST, Feb 1935, p. 88), but by Feb 1936 (QST, p. 84) only the 56 MHz version was advertised.