I used one for many years on Ham RTTY along with a HAL ST-6000 TU. It made a very nice RTTY station. I also used it in conjunction with a Model 15 Teletype machine. I did my typing on the HAL with its nice and easy to use keyboard and received on the Model 15. The type ahead buffer in the HAL also was a nice feature to have. Although a bit dated now, it is definitely worth keeping. Regards -- Roy, K4EEG