Fellas, I recently bought one of these "CPX220-12" 220 MHz cavity filters from Fair Radio Sales: <https://www.fairradio.com/catalog.php?mode=viewitem&item=3886> just to see what it was. It is a true bandpass cavity, with identical coupling loops behind the two N connectors. The one I received could best be described as "Like new, pulled from equipment." It has decent selectivity, but I know that the loops need to be modified slightly (very easy to do) to optimize performance in the 222-225 MHz band. As delivered, it performs best above 225 MHz. It appears to have been set at the factory at 220 MHz, and the paint on the adjustment screws is intact, suggesting that it was never placed in service.
73, Eric Lemmon WB6FLY -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of de W5DK Sent: Saturday, February 13, 2010 4:59 PM To: [email protected] Subject: Re: [Repeater-Builder] WTB: 220 MHz pass cavity Bob I had replied and dropped the ball on checking my inventory. I just pulled down a two bp cavity series set from a combiner down from storage and swept one cavity. It's from sinclair and is part 4 of 5 model ctr28140. What spec do you need? Don W5DK Sent from my iPhone On Feb 13, 2010, at 4:57 PM, [email protected] <mailto:no6b%40no6b.com> wrote: > A while back I posted a WTB for the above. A few people responded but > unfortunately the e-mail chain on the one good prospect seems to have > gotten lost. > > So once again I'm looking for a used 220 MHz pass cavity (not pass- > notch, > not window filter a la DCI). Thanks. > > Bob NO6B > > > > ------------------------------------ > > > > Yahoo! Groups Links > > >
