The "7 Line" was the last amateur radio system by the R.L. Drake Company. The line included a transceiver, receiver, remote VFO's, tuners and other accessories. What was missing from the line was a signal display unit. So we created our own.

Rather than starting from scratch, we took the easy route. We took the venerable Heath SB-614 and repackaged it in a Drake TR-7 transceiver case to match the rest of the 7 Line.

Presented on the left is the result of these efforts. No schematic is included since no change to the original SB-614 circuit was required.

Click on any picture to enlarge it
Our "Drake" SD-7 signal display
The front of the SD-7
The left side
The right side
The rear panel
The main circuit board
The board hinges up for easy access