The BBG Was Originally called the BB2.
The BB2 fm transmitter Circuit was the same as the later BBG, however had
an additional pulse circuit added to the board ( As You Can See Below
Left ). The BB2 fm transmitter circuit was a dual-purpose device in that the microphone could
be removed, the pulse circuit added and then the device was used as a
tracking device. Later on I deleted the pulse circuit and turned it
into the BBG. As you can see below, little was changed regarding the
board design other than re-designing the board with the Protel
The Original software used to design the BB2 FM Transmitter Circuit board was a small drawing (DOS) program called Edraw that you will see in the "Circuit Board Software" Link below.
The modified BB2 Board to the new name "BBG" was identical other than removing the pulse circuit and leaving only the transmitter
circuitry. The Software used to design the modified BBG Board was a DOS
program called PROTEL EASYTRAX - which is freeware now - and again,
described in the "Circuit Board Software" Link Below.