A matched pair of 2.7 kHZ K3/K3S SSB filters; $160 ($80 ea). Prefer not to break up. QSL: W5JV Doug W5JV K1, K2, K3S Visit https://www.qrz.com/db/W5JV for some great boat-anchor items. Looking for something special? Ask us. Wanted: Petersen Type PR-1 Crystal in FT-243 holder cut for 1770 kHZ (Used in IF Stage of a Mackay Receiver).