Hello, I have 2 Ten Tec filters for sale: Model 217 500 Hz and the Model 219 250 Hz. $ 70 each shipped. Also have a DB37-TT-OR cable for the MicroHam Micro keyer to Orion interface. $45 shipped. USPS money order, no Pay Pal, or overseas shipping. Thanks, Robb N0RU Woodland Park, CO rurie at mywdo.com