FOR SALE: RCA 6KD6 Transmitting Tubes I have twelve of these available in boxes. QTY 3 new ones available for $19.00 each. QTY 9 used ones available for $12.00 each. Pair of new 6L6 metal octal tubes $35.00 Pair of RCA 1614 metal octal tubes, used Will sell the pair for $12.00 Shipping additional. More at: http://www.af4k.com/tubes.htm