Early Yaesu Musen Co. SSB Ham Radio Equipment in Australia

Shown below are Block Diagrams of the FT-100B and the FTDX100, 5 band SSB/CW/AM mainly solid state transceivers.

Note that the block diagrams of the FT-100B and the FTDX100 are almost identical. Both germanium and silicon transistors were used in almost equal quantities, unlike the original FT-100 which used nearly all germanium devices, and the later FT-101 which used nearly all silicon devices. By the time Yaesu released the FT-100B they had refined their solid state transceiver design considerably, having used the model's FT-100 Mark 1 and 2 to iron out problem areas. Being at the forefront of technology when it was first released, the original Mark 1 FT-100 did have a few teething problems, to the extent that Bail's published their own three page Trouble Shooting Guide for it.

	Shown at left are Fred Bail, VK3YS and Jim Bail, VK3ABA. At right are depicted various Bail logos.

Fred Bail passed away in the late 1970's, Jim Bail passed away in the early 1980's. Following Fred's passing their company was sold to Stan Roberts of Teletramel, who continued to run Bail Electronic Services into the early 1990's from the Victorian country town of Wangaratta.

The author would be happy to hear from anybody who has very early Yaesu equipment, such as FL-20 Mark's 1 and 2, or FL-100B Mark's 1 and 2. By way of some background information on the author, Greg Whiter was employed by Bail Electronic Services (see 1974 staff photo) from the late 1960's through to 1977. Following this period he formed the company GFS Electronic Imports, of which he is still a director today.

Other web articles by the same author   The Chronological History of the Development of Radio
Origins Of The Handie Talkie

Copyright © Greg D. Whiter 2011 - All rights Reserved

This page was last updated 01-07-2011