TSU-6 px for Kenwood TM-231A, TM-241A and TH-25AT
[TSU-6px]

Although the TSU-6 px tone board is no longer available from Kenwood, Piexx was able to supply it at a reasonable cost. The tone board also works with the Kenwood 731 A dual bander which is the rig I own. The instructions were clear & thorough. I was also very satisfied with the company's (Piexx) customer service.