This Technical Material Corp GSB-1 SSB Adapter is made for use with the GPR-90, GPR-90RX Communications Receivers, and all the variants.

It is in Collector Quality Condition with the original paint and finish and looks great.  Even the AC cord and plug are original and in great shape.

this version has the closed in rear panel rather than completely open.

The front Panel is free from marks and scratches and the cabinet is also super clean with no bad marks or scratches.

This GSB-1 Has been tested with a GRP-90 and it works great with no obvious problems.

You will be hard pressed to find a finer example of the GSB-1 SSB Adapter.

 A Copy of The Manual is also included.

Read about this SSB Adapter:

TMC Side Band Adapter was designed originally for use with the TMC GPR-90 Radio Receiver. 

Actually it can work with receivers with the 455 Khz IF and permits simple and accurate tuning of single sideband signals and can help in the reception of AM and CW signals. 

The 455 Khz IF signal from the receiver is sent to the GSB-1 for conversion via a shielded cable assembly with RCA type plugs.

  It has Upper and Lower side band selection.  The GSB-1 weighs about 27 pounds by itself.  The size is about 12 inches wide by 10 inches high by 15 inches deep. 

The speaker output is 6, 8, 16 ohms or just use the Line output 600 ohms.  There is a headset output as well.  It runs on 115 volts ac, 50/60 Hz at about 55 watts.  The Frequency range it tunes is about 452 to 458 Khz.

  I am very proficient at packing and shipping heavy vintage gear. I buy the proper shipping cartons and materials to assure safe shipment.