Roofing Filter Yaesu Ft1000mp

The amplifier provides enough gain to overcome the filter insertion loss plus a db or two. For the ft 1000mp the mod is plug in with no soldering required and can be easily removed. Here is mod infor for the ft 1000mp from joe k1wpo.

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Roofing filter mods for yaesu ft 1000mp series and ft 1000 d icom ic 756pro 2 3 icom ic 765 775 781 ten tec omni vi kenwood ts 850 930 950 and other radios to improve close in dynamic range.

Roofing filter yaesu ft1000mp.

Inrad roofing filters can substantially reduce the third order intermod from multiple strong signals in the 2 20khz range on either side of the tuned frequency. The inrad ft 1000 roofing filter mod consists of a 6 pole 4 5 khz wide filter followed by a high dynamic range feedback amplifier. Ft 1000mp series filter selection the ft 1000mp receiver is triple conversion with ifs at 70 455 mhz 8 215 mhz and 455 khz. The yaesu and the inrad roofing filters mounted into the ft1000 mkv field rig.

Installing the inrad roofing filter the mp roofing filter mod consists of a 6 pole 4 khz wide filter followed by a high dynamic range feedback amplifier. Discontinued this roofing filter substantially reduces the third order intermodulation from multiple strong signals in the 2 to 20 khz region either side of the tuned frequency. The first if has a soldered in 12 khz monolithic 4 pole filter which is in line for all receiving modes. Initial results were promising and a mod board was designed before the dayton hamvention.

His corespondence is quoted below followed by pictures he sent. This mod works in all versions of the yaesu ft 1000mp line of radios. Earlier this year we located a source that can produce good filters at 70 455 mhz and other vhf frequencies. We procured some and ran numerous tests.

This mod applies to both the ft 1000 and the ft 1000d. Installing the inrad roofing filter mod. Yaesu ft 1000mp all versions roofing filter mod. His radio has an inrad roofing filter so the width is less than a stock mp which would be about 15khz.

Thanks joe for sharing this with the lp pan community. A run of 100 units was completed and we tested and documented each unit. The amplifier provides enough gain to override the filter insertion loss plus a db or two. The inrad roofing filter does not substitute the rig s original it is placed at the output of the original 12khz roofing filter 18 to be good.

Yaesu ft 1000mp mkv field roofing filters. When you purchase anyversion of the ft 1000mp it comes with three filters installed and six additional option slots. One thing is to be well known.