Hi All, I was wondering if anyone knew how I can acquire some EPROMS for the 4040 TNC. Heath Part numbers are 444-351 and 444-352. The ones on the unit that I have are programmed for WA8DED mode. I would like to swap or purchase the correct ones or buy an old tnc working or not. My number is 860-646-7177. Thank for your help. Bob KA1HVF