Eric, The 9182510Y17 filter is a Motorola product, made by Celwave. Call Motorola Parts ID at 800-422-4210, and have the clerk find what the Celwave part number is. Then call Celwave (RFS World) to get servicing data. It may be a long shot, but also ask the Parts ID clerk what Motorola manual covers this filter. You might luck out- if it's not out of print.
It may be a good idea to ship the unit back to Celwave for a factory conversion to your desired frequency. Such units seldom can be moved more than 10 or 15 MHz without loop adjustment. 73, Eric Lemmon WB6FLY -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of kk2ed Sent: Wednesday, May 21, 2008 10:20 PM To: [email protected] Subject: [Repeater-Builder] Need help IDing Celwave filter I have a Celwave filter PN 9182510Y17 MFG date of 2/4/00 It is about 10"x10" square and 1" high, and has SMA connectors, one on each side (left/right), and 9 flat-head tuning screws in the front (just like the ones on the small 50w duplexers). It was brand new in the wrapper when I found it. I swept it on my tracking generator, and it looked to be some sort of window filter, centered at 390MHz or so. I attempted to retune it to the 444MHz range, as I need a filter in front of a preamp at a repeater site to clean up some interference from a T-Band system. I was able to retune it to provide a nice curve at 444MHz with about 2db insertion loss, and about 50db down at 460MHz. It also looks like it has one or two notches to the high side, so I could notch out a particular 470 frequency if needed. The strange thing (why I'm posting) is the tuning behavior. Of the nine tuning screws, counting them 1-9 from left to right, screws 1, 5, and 9 all seem to adjust the passband center freq, screws 3 and 7 seem to adjust what appears to be two notches (or one if I "pull" them together), and screws 2,4,6, and 8 seem to do nothing at all. Anyone have any ideas as to exactly what kind of filter this thing is, and how to properly tune it? As it stands right now, based on how it plots on my 8920's tracking generator, it looks like it should make a halfway decent filter for in front of a preamp, but I'd like to tune it properly if I can figure out how and what kind of filter it was designed to be. Thanks Eric KE2D
